Linksys Network Router Etherfast User Manual

Instant EtherFast^®Series

EtherFast Managed 24-Port

with Dual Gigabit Switch

Use this guide to install:

Linksys EtherFast^®Managed 24-Port

with Dual Gigabit Switch (EF24G2M)

User Guide

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Table of Contents

Introduction

The Linksys EtherFast Managed 24-Port

Package Contents

with Dual Gigabit Switch

Getting to Know the Switch

LEDs

The RJ-45 Ports

The Gigabit Ports

The Console Port

Migrate your network to Gigabit speed with the EtherFast^®Managed 24-Port with

Dual Gigabit Switch. Perfect for today’s network computing demands, this new

Managed 24-Port Switch from Linksys delivers Layer 3 switching and blazing

transfer speeds for your network applications with integrated Gigabit over cop-

per connectivity.

Installing the Switch

Pre-Installation Considerations

Rack-Mounting the Switch

Powering on the Switch

The Managed 24-Port Switch’s “intelligent” Layer 3 switching and design provide

maximum network control, regulating traffic and eliminating server bottlenecks.

Integrate the Managed 24-Port Switch into your current Ethernet network, and

your data traffic efficiency will improve several times over. Connect your worksta-

tions to the managed 10/100 ports, and speed up access time for all your users in

just one move. Connect your servers through the Gigabit ports for dedicated band-

width of up to 1000Mbps—and you’ve maximized your network potential. Plus,

configuration’s a snap using the Web management interface.

Uplinking the Switch

Switch Management

Overview

Configuring the Switch

Overview

Logging On to the Switch

Main Menu

System Information Menu

Management Setup Menu

Device Control Menu

Network Monitor Menu

System Restart Menu

Exit

Save money and time with this all-in-one managed solution for Gigabit connectiv-

ity to your servers or Gigabit backbone.

Troubleshooting

Common Problems and Solutions

Glossary

Upgrading Firmware via the Serial Port

Glossary

Specifications

104

Environmental

104

Warranty Information

Contact Information

105

106

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Getting to Know the Switch

LEDs

Power

(Green) The LED will illuminate when the switch is

powered on.

SNMP

Console

(Green) The LED will illuminate when the switch is

being managed via SNMP.

Package Contents

(Green) The LED will illuminate when the switch is

being managed via the local console.

• One EtherFast^®Managed 24-Port with Dual Gigabit Switch

• One Power Cord

• Mounting Brackets (not shown)

• One Serial/Console Cable (not shown)

• User Guide

Fan Failure

OverHeat

(Green) The LED will illuminate when a fan has failed.

(Green) The LED will illuminate when the switch is

overheating.

• Registration Card (not shown)

PER PORT

LNK

(Green) The LED will illuminate when the port is

connected.

Mode

(Green) The LED will illuminate when the port is

operating in full-duplex mode.

GIGABIT PER PORT (G1/G2)

LNK

(Green) The LED will illuminate when the port

is successfully connected to a network.

ACT

(Green) The LED will illuminate when the port is

actively operating.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

MODE

COL

The RJ-45 Ports

(Amber) The LED will illuminate when collisions are

The EtherFast^®Managed 24-Port with Dual Gigabit Switch is equipped with

twenty-four 10/100 RJ-45 ports. These RJ-45 ports support network speeds of

either 10-100Mbps in half-duplex mode, or 20-200Mbps in full-duplex mode.

Auto-sensing technology enables each port to automatically detect the speed

of the device connected to it (10Mbps or 100Mbps), and adjust its speed and

duplex accordingly.

detected.

ACT

(Amber) The LED will illuminate when there are active

ports.

(Amber) The LED will illuminate when there are ports

operating in full-duplex mode.

(Amber) The LED will illuminate when there are ports

transmitting data at 100Mbps.

FDX

100M

To connect a device to a port, you will need to use a network cable. If you are

using 100BaseTX devices you will need to use UTP Category 5 (or better)

cable. The two Gigabit ports require UTP Category 5e cable (or better).

The Reset Button

If your Switch is having problems with network connections, press the Reset

button for five seconds. This clears up any jammed connections, and is simi-

lar to pressing the Reset button on your PC to reboot it.

The Gigabit Ports

The EtherFast^®Managed 24-Port with Dual Gigabit Switch is equipped with

two Gigabit ports. These ports provide links to high-speed network segments

or individual workstations at speeds of up to 1000Mbps (Gigabit Ethernet).

The two Gigabit ports require UTP Category 5e cable (or better).

The Console Port

The EtherFast^®Managed 24-Port with Dual Gigabit Switch is equipped with

a serial port (located on the rear of the switch) that allows you to connect to a

computer (for configuration purposes) using the provided serial cable.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Rack-Mounting the Switch

Installing the Switch

The EtherFast^®Managed 24-Port with Dual Gigabit Switch can be used as a

free-standing unit, or installed in any standard 19-inch rack.

Pre-Installation Considerations

Fast Ethernet Considerations

Use the following instructions to rack-mount the Switch:

Before you begin, disconnect all cables from the Switch.

1. Place the Switch right side up, with the front panel facing you.

If you will be using the Switch for Fast Ethernet (100Mbps) or Gigabit

(1000Mbps) applications, you must observe this guideline:

The maximum UTP cabling length using Category 5 cable is 328 feet (100m).

2. Position a mounting bracket over the screw holes on one side of the

Switch.

Full-Duplex Considerations

As previously mentioned, the Switch provides full-duplex support for its RJ-

45 ports. Full-duplex operation allows data to be sent and received simultane-

ously, doubling a port’s potential data throughput.

3. Secure the mounting bracket by inserting three screws into the screw

holes. Use a screwdriver to tighten the screws, ensuring that they are

fastened firmly in place.

If you will be using the Switch in full-duplex mode, the maximum UTP cable

length using Category 5e (or better) cable is 328 feet (100 meters).

4. Repeat steps 2 and 3 to install the other mounting bracket on the opposite

side of the Switch.

Positioning the Switch

5. Insert the Switch into the 19-inch rack and secure it with suitable

screws (not provided). Ensure that the ventilation holes are not obstructed.

Before you choose a location for the Switch, observe the following guide-

lines:

The rack-mount installation is complete.

You can now re-connect the cables to the Switch.

• Keep cabling away from sources of electrical noise, power lines, and

fluorescent lighting fixtures.

Powering on the Switch

To power on the Switch, simply connect the AC power cord to the back of the

Switch, and then plug the power cord into an electrical outlet. The Switch

will boot up within approximately 30 seconds.

• Position the Switch away from water and moisture sources.

• To ensure adequate air flow around the Switch, be sure to provide a

minimum of one inch (25mm) clearance.

Uplinking the Switch

Any of the 26 ports on the EtherFast^®Managed 24-Port with Dual Gigabit

Switch can act as an uplink port, allowing you to uplink to other switches or

hubs using a standard Ethernet connection. UTP Category 5e (or better)

cable is recommended when using the Gigabit ports.

• Do not stack free-standing Switches more than four units high.

To uplink the switch, connect one end of a network cable into the Switch,

then connect the other end of the cable into the desired network device’s

uplink port.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

2. The following screen will appear. Enter a Name for this connection. In

the example below, the name of the connection is EF24G2M. Click the

OK button.

Switch Management

Overview

The Linksys EtherFast^®Managed 24-Port with Dual Gigabit Switch offers an

easy-to-use, menu-driven configuration program. This program can be

accessed by a console interface, a Web browser, a telnet connection, or

SNMP/RMON. Using this configuration program, you can perform various

switch configuration and management activities, including:

• Enable/disable any port

• Set the communication mode for any port

• Configure SNMP parameters

• Add ports to network VLANs

Local Console Management

You can manage the Switch locally by connecting the switch to a PC or work-

station with terminal emulation software using the serial port.

3. The following screen will appear. In the bottom drop down box labeled

Connect using:, click the arrow and choose the COM port that the

Switch will be connected to. In the example below, COM1 is the port

selected. Click the OK button.

The serial port settings need to be configured before connecting to the

Switch. In order to change the settings of your port, run the Hyperterminal

program. This program comes packaged with Windows, but it may not be

installed on your computer. It should be located as is shown below (varies

according to operating system). If it is not, consult your Windows documenta-

tion for instructions on installing Hyperterminal.

1. Click the Start button. Select Accessories and then Communications.

Hyperterminal should be one of the options listed in this menu. Select

Hyperterminal.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

4. When the following screen appears, make sure that the Switch’s serial port

settings are as follows:

Telnet Management

Telnet management is available after the Switch has been configured with a

valid IP address, subnet mask, and default gateway (for Layer 2 mode) via the

console interface. Use telnet from any computer attached to the network.

BAUD RATE:

DATA BITS:

PARITY:

STOP BITS:

FLOW CONTROL: None

19200

None

SNMP/RMON Management

SNMP/RMON management is available after the Switch has been configured

with a valid IP address, subnet mask, and default gateway (for Layer 2 mode)

via the console interface. Manage the Switch from any network computer

using network management software.

Note: The Switch’s configuration program only provides

access to basic configuration functions. To access the

full range of SNMP management functions, you must use

SNMP-based network management software.

Click the OK button.

Web Management

Web management is available after the Switch has been configured with a

valid IP address, subnet mask, and default gateway (for Layer 2 mode) via the

console interface. Use a standard Web browser (Internet Explorer 4.0 or

above, or Netscape Navigator 4.0 or above is suggested) from any computer

attached to the network. The Switch has a default IP address of 192.168.1.254

and a default subnet address of 255.255.255.0.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Main Menu

Configuring the Switch

After you log on to the Switch, the Main Menu screen will appear.

Overview

The Switch’s menu-driven configuration program may be configured using

the local console, a Web browser, telnet, or SNMP/RMON. The remote man-

agement methods can be used once the IP parameters have been set via the

local console.

Logging On to the Switch

When logging on to the Switch, you will receive the following screen prompt:

User Name:

Password:

Enter the default User Name (“admin”), and press Enter. Do not enter any-

thing for the Password, and press Enter.

The Main Menu screen consists of a series of options. Each option leads you

to the screen for that management setting. Highlighting any option selects it;

pressing the Enter key takes you to that screen.

To navigate through the Console Interface, use the Tab or arrow keys to

move, the Enter key to select, and the Esc key to return to the previous selec-

tion. Scroll through choices using the spacebar. Options for the currently

selected item are displayed in the highlighted area at the bottom of the inter-

face screen.

The text string in the top right corner of the screen shows if the Switch is

operating as a Layer 2 switch or as a multilayer routing switch.

• System Information Menu - Displays a basic description of the switch,

including contact information and hardware and firmware versions.

• Management Setup Menu - Adjust the communication parameters, ensur-

ing a reliable connection.

When you select User Configuration from the Management Setup Menu

(discussed later in this User Guide), you will be allowed to define a new

administrator password.

• Device Control Menu - Controls a broad range of functions, including

port mode, port mirroring, port trunking, spanning tree, VLANs, IP sub-

nets, multicast filtering, and routing protocols.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

• Network Monitor Menu - Provides access to port statistics, RMON statis-

tics, address tables, VLAN registration and forwarding information, multi-

cast groups, and subnet addresses.

System Information

The System Information screen displays descriptive information about the

Switch or system.

• System Restart Menu - Resets the management agent.

• Exit - Exits the program and terminates communications with the Switch

for the current session.

System Information Menu

The System Information Menu displays a basic description of the Switch,

including contact information and hardware and firmware versions.

• System Description - System hardware description.

• System Object ID - MIB II object identifier for the Switch’s network

management subsystem.

• System Up Time - Length of time the current management agent has been

running. Note that the first value is in centiseconds.

• System Name* - Name assigned to the switch system.

• System Information - Provides basic system descriptions, including con-

tact information.

• System Contact* - Contact person for the system.

• System Location* - Specifies the area or location where the system

resides.

• Switch Information - Shows hardware and firmware version numbers,

power status, and Gigabit port usage of the Switch.

* The maximum string length is 99, but the screen only displays 45 charac-

ters. You can use the arrow keys to browse the entire string.

Select OK to return to the previous panel.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Switch Information

Management Setup Menu

The Switch Information screen displays hardware and firmware version num-

bers for the main board, as well as the power status.

The Management Setup Menu screen allows you to adjust the communication

parameters, ensuring a reliable connection. The new administrator password is

set through this menu. The IP parameters for Web, telnet, or SNMP/RMON

management are set here as well.

• Hardware Version - Hardware version of the main board.

• Firmware Version - System firmware version in ROM.

• Serial Number - Serial number of the main board.

• Number of Ports - Number of ports available on this Switch.

• Power Status - Shows if power is active or inactive.

• Fan Power Status - Shows if power to fan is active or inactive.

• G1 Information - Speed of the first Gigabit port.

• G2 Information - Speed of the second Gigabit port.

Select OK to return to the previous panel.

• Network Configuration - Includes IP setup, ping facility, and HTTP

setup for the on-board Web agent.

• Serial Port Configuration - Sets communication parameters for the serial

port, including baud rate, console time-out, and screen data refresh inter-

val.

• SNMP Configuration - Activates authentication failure traps and config-

ures communities and trap managers.

• User Configuration - Sets the user names and passwords for system

access.

• TFTP Download - Downloads new version of firmware to update your

system.

• Configuration File - Allows downloading of a configuration file.

Select OK to return to the previous panel.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Network Configuration

IP Configuration

The Network Configuration menu allows you to set the Switch’s IP address,

configure the IP parameters, or enable the on-board Web management.

The IP Configuration menu allows you to configure the IP parameters.

(Only displayed in Layer 2 mode)

• Interface Type - Indicates IP over Ethernet.

• IP Configuration* - Sets the bootup option or configure the Switch’s IP

parameters.

• IP Address - IP address of the Switch you are managing. The system

supports SNMP over UDP/IP transport protocol. In this environment, all

systems on the Internet, such as network interconnection devices, must

have an IP address.

• IP Connectivity Test (Ping) - Tests IP connectivity to a specified device.

• HTTP Configuration - Allows the admin to enable or disable the Web

administration.

• Subnet Mask - Subnet mask of the Switch. This mask identifies the host

address bits used for routing to specific subnets.

* This menu does not appear if the Switch is set to multilayer mode. In this

case, you need to configure an IP interface for each VLAN that needs to con-

nect to any device outside of its own VLAN group.

• Gateway IP - Gateway used to pass trap messages from the system to

the management station. Note: The gateway must be defined (when oper-

ating at Layer 2) if the management station is located in a different IP

segment.

Select OK to return to the previous panel.

• IP State - Specifics whether IP functionality is enabled via manual con-

figuration (default setting), or set by Boot Protocol (BOOTP).

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

IP Connectivity Test (Ping)

HTTP Configuration

The HTTP Configuration screen allows you to enable or disable Web man-

agement.

The IP Connectivity Test is used to see if another site or node on the net-

work can be reached.

Note: Port 80 is used for HTTP service.

• IP Address - IP address of the device you want to ping.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

• Test Times - The number of ICMP echo requests to send to the specified

site. Range varies from 1 to 1000.

• Success/Failure - The number of times the specified site has responded—

or not—to a ping request.

Note: There is a 10-second interval between pings.

Select Start to begin the test. Select Cancel to cancel the test.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Serial Port Configuration

SNMP Configuration

The Serial Port Configuration screen allows you to access the communication

parameters for the Switch’s serial port.

The SNMP Configuration screen displays parameters for the Simple Network

Management Protocol (SNMP).

• Baud Rate - The rate at which data is sent between devices. Default is

19200. Options are 9600, 19200, and 38400 baud.

• Send Authentication Fail Traps - Issue a trap message to specified IP

trap managers whenever authentication of an SNMP request fails. Default

is enabled.

• Data Bits - Sets the data bits of the RS-232 port. Options are 7 and 8.

• Stop Bits - Sets the stop bits of the RS-232 port. Options are 1 and 2.

• SNMP Communities - Assigns SNMP access based on specified strings.

• Parity - Sets the parity of the RS-232 port. Default is None. Options are

• IP Trap Managers - Specifies management stations that will receive

none, odd, and even.

authentication failure messages or other trap messages from the Switch.

• Time-Out - If no input is received from the attached device after this

interval, the current session is automatically closed. Default is 10 minutes.

The range is 0 to 100 minutes, where 0 indicates disabled.

Select OK to return to the previous panel.

• Auto Refresh - Sets the interval before a console session will auto refresh

the console information, such as Spanning Tree Information, Port

Configuration, Port Statistics, and RMON Statistics. Default is 1 second.

The range is 0, or 5 to 255 seconds, where 0 indicates disabled.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

SNMP Communities

IP Trap Managers

The SNMP Communities screen allows you to configure the community

strings authorized for management access. Up to five community names

may be entered.

The IP Trap Managers screen specifies management stations that will

receive authentication failure messages or other trap messages from the

Switch. Up to five trap managers may be entered.

• Community Name - A community entry authorized for management

• IP Address - IP address of the trap manager.

access. Maximum string length is 19 characters.

• Community Name - A community specified for trap management

• Access - Management access is restricted to Read Only or Read/Write.

access.

• Status - Sets administrative status of entry to enabled or disabled.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

User Configuration

Add User

The User Configuration screen to restrict management access based on speci-

fied user names and passwords. There are two user types, Administrator and

Guest. Only the Administrator has write access for parameters governing the

SNMP agent.

The Add User screen allows you to add a user.

• User Name - Specifies user authorized management access to the

Switch via the console, telnet, or the Web.

• User Name - Specifies user authorized management access to the

• Password - Sets up the password for the new user.

Switch via the console, telnet, or the Web.

• Access Right - ADMIN: Read/Write for all screens.

GUEST: Read Only for all screens.

• Console Access - Authorizes management via the console.

• Telnet Access - Authorizes management via a telnet connection.

• HTTP Access - Authorizes management via HTTP, e.g., a Web browser.

Select OK to confirm the changes. Select Cancel to cancel any changes.

• Console - Authorizes management via the console.

• Telnet - Authorizes management via a telnet connection.

• HTTP - Authorizes management via HTTP, e.g., a Web browser.

Select Add to add a user. Select OK to return to the previous panel.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

TFTP Download

Configuration File

The TFTP Download screen lets you load software updates to permanent

flash ROM in the Switch. After downloading the new software, the agent will

automatically restart itself.

The Configuration File screen allows you to load a configuration file on any

Switch on the network.

• Station IP - IP address of the Switch you want the configuration file to

• Download Server IP - IP address of a TFTP server.

be sent to.

• Download Filename - The binary file to download.

• Operation - Gives you the choice of downloading the configuration file

from your Switch.

• Download Option - You may choose either Runtime Code or Post

Code.

Download from switch - Downloads the current switch configura-

tion to a file on the client PC.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

Upload to switch - Uploads a configuration file to the Switch from

the client PC.

Select Start to begin the download. Select Cancel to cancel the download.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Device Control Menu

The Device Control Menu is used to control a broad range of functions,

including port mode, port mirroring, port trunking, Spanning Tree, VLANs,

IP subnets, multicast filtering, and routing protocols.

Note: This screen shots shows the Device Control Menu displayed by a Layer

2 switch.

• IGMP Snooping Configuration - Configures IGMP multicast filtering.

(Only displayed for Layer 2 mode. When the Switch is in multilayer mode,

IGMP Snooping Configuration is available through the IP Menu.)

Note: This screen shots shows the Device Control Menu displayed by a mul-

tilayer switch.

Select OK to return to the previous panel.

• System Mode - Sets the Switch to operate as a Layer 2 switch or as a mul-

tilayer routing switch.

• Layer 2 Menu - Configures port communication mode, mirror ports, and

port trunking.

• Bridge Menu - Configures the Spanning Tree Protocol for the bridge or

for specific ports, GMRP and GVRP for automatic registration of multi-

cast and VLAN groups, traffic class priority threshold, and address aging

time.

• VLAN Menu - Configures VLAN settings for specific ports, and defines

the port membership for VLAN groups.

• IP Menu - Configures the subnets for each VLAN group, global configu-

ration for unicast and multicast routing protocols, and IGMP snooping.

(Only displayed for multilayer mode)

• Security Menu - Configures security settings here.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

System Mode

Layer 2 Menu

The System Mode screen lets you set the Switch to operate as a Layer 2

switch or as a multilayer routing switch. As a Layer 2 switch, the Switch

makes all filtering and forwarding decisions based strictly on MAC address-

es. As a multilayer routing switch, it switches packets for all non-IP protocols

based on MAC addresses, and routes all IP packets based on the specified

routing protocol.

The Layer 2 Menu contains options for port configuration, port mirroring,

and port trunking.

• Port Configuration - Enables any port, enables/disables flow control,

and sets communication mode to auto-negotiation, full duplex, or half

duplex.

• Layer 2 - Filtering and forwarding decisions will be based on MAC

• Mirror Port Configuration - Sets the source and target ports for mir-

addresses for all protocol traffic.

roring.

• Multilayer - Switching based on MAC addresses will be used for all

non-IP protocol traffic, and routing will be used for all IP protocol

traffic.

• Port Trunking Configuration - Specifies ports to group into aggregate

trunks.

• Static Unicast Address Configuration - Used to manually configure

Select OK to return to the previous panel.

host MAC addresses in the unicast table.

• Static Multicast Address Configuration - Used to manually configure

host MAC addresses in the multicast table.

Select OK to return to the previous panel.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Port Configuration

connected directly to the Switch when its buffers fill. When enabled,

back pressure is used for half duplex and IEEE 802.3x for full duplex.

The Port Configuration screen lets you display or set communication

parameters for any port or module on the Switch, including administrative

status, auto-negotiation, default communication speed and duplex mode,

as well as flow control in use.

Note: Flow control should not be used if a port is connected to a hub.

• Jack Type - Shows the jack type for each port. Ports 1-26 are RJ-45.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes. Select Prev Page to view the previous

page. Select Next Page to view the next page.

Mirror Port Configuration

The Mirror Port Configuration screen allows you to mirror traffic from

any source port to a target port for real-time analysis. You can then attach

a logic analyzer or RMON probe to the target port and study the traffic

crossing the source port in a completely unobtrusive manner. When mir-

roring port traffic, the target port must be included in the same VLAN as

the source port.

• Link Status - Indicates if the port has a valid connection to an

external device.

• Admin Status - Allows you to disable a port due to abnormal behavior

(e.g., excessive collisions), and then re-enable it after the problem has

been resolved.

• Auto Negotiate - Enables or disables auto-negotiation for port speed,

duplex mode, and flow control.

• Default Type - If auto-negotiation is disabled, the port will be set to the

indicated speed and duplex mode.

• Current Type - Indicates the current speed and duplex mode.

• Enable Port Mirror - Enables or disables the mirror function.

• Flow Control - Used to enable or disable flow control. Flow control can

• Mirrored Ports (Tx/Rx) - The port whose transmitted or received traffic

eliminate frame loss by “blocking” traffic from end stations or segments

will be mirrored. Press Add to specify mirrored ports.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

• Monitor Port - The port that will duplicate the transmitted or received

Static Unicast Address Configuration

traffic appearing on the mirrored port.

The Static Unicast Address Table can be used to assign the MAC address

for a host device to a specific port on this Switch. Static unicast addresses

are never aged out, and cannot be learned on another port.

Note: You can mirror multiple ports to a single port to view traffic such as

that crossing a port trunk. However, note that some packets may be

dropped for moderate to heavy loading.

Select Apply to make changes. Select OK to return to the previous panel.

Select Add to add a port.

Port Trunking Configuration

Ports can be combined into an aggregate link to increase the bandwidth of

a network connection or ensure fault recovery. You can configure trunks

between any two switches. The RJ-45 ports on this Switch can be grouped

into a trunk consisting of two, four, or eight ports, creating an aggregate

bandwidth up to 400, 800, or 1600Mbps when operating at full duplex.

• Address - The MAC address of a host device attached to this Switch.

• Port - The switch port the host device is attached to.

To assign a destination MAC address to one or more ports, use Add. To

delete or modify an address, highlight it with the cursor and press Enter.

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply.

• Index - The trunk identifier.

• Port Count - Trunks can contain 2, 4, or 8 ports.

• Port Number - The ports assigned to each trunk.

Select OK to return to the previous panel. Select Add to add a trunk.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Add Static Address Entry

Static Multicast Address Configuration

The Add Static Address Entry screen allows you to add static

addresses for unicasting.

The Static Multicast Address Table can be used to assign a destination

MAC address (and the corresponding ports) to the VLAN group used for a

specific multicast service. Static multicast addresses are never aged out,

and traffic with these addresses can only be forwarded to ports specified

in this table.

• Address - The MAC address of a host device attached to this

Switch.

• VLAN - The VLAN corresponding to this multicast service.

• Port - The switch port the host device is attached to.

• Address - The destination MAC address for a multicast service.

Select OK to confirm the changes. Select Cancel to cancel any changes.

• Port - The ports to which this multicast traffic can be forwarded. Read

the numbers vertically; they range from 1-26. For each port number,

there are two choices:

If the letter “M” is present, it indicates that the VLAN has access to

messages transmitted by that particular port.

If there is no letter “M,” then there is no access to messages trans

mitted by that particular port.

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Add Multicast Address Entry

Bridge Menu

The Add Static Address Entry screen allows you to add static

addresses for multicasting.

The Bridge Menu is used to configure settings for the Spanning Tree

Algorithm, as well as the global bridge settings for GMRP (GARP Multicast

Registration Protocol) and GVRP (GARP VLAN Registration Protocol), traf-

fic classes priority threshold, and address aging time.

• VLAN - The VLAN corresponding to this multicast service.

• Address - The destination MAC address for a multicast service.

• Port - The ports to which this multicast traffic can be forwarded.

• Bridge Configuration - Contains global bridge settings for STA (includ-

ing bridge priority, hello time, forward delay, maximum message age),

GMRP, GVRP, traffic class priority threshold, and address aging time.

Read the numbers vertically; they range from 1-26. For each port

number, there are two choices: “M” or nothing. Use the spacebar to

scroll through the choices.

• Spanning Tree Port Configuration - Contains STA settings for individual

ports, including port priority, path cost, and fast forwarding.

Select the letter “M” to indicate that the VLAN has access to mes-

sages transmitted by that particular port.

Select OK to return to the previous panel.

Select a blank space to indicate that there is no access to messages

transmitted by that particular port.

Select OK to confirm the changes. Select Cancel to cancel any changes.

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EtherFast^®Managed 24-Port with Dual Gigabit Switch

Bridge Configuration

• GVRP - GVRP defines a way for switches to exchange VLAN informa-

tion in order to register VLAN members on ports across the network.

This function should be enabled to permit automatic VLAN registration,

and to support VLANs which extend beyond the local switch.

The Bridge Configuration screen allows you to configure global bridge

settings.

• Priority Threshold - This Switch supports Quality of Service (QoS) by

using two priority queues, with Weighted Fair Queuing for each port.

• Aging Time - Time-out period in seconds for aging out dynamically

learned forwarding information. Range varies from 10-415 seconds.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

Spanning Tree Port Configuration

The Spanning Tree Port Configuration allows you to configure spanning

tree port settings.

• Spanning Tree - Enable this parameter to participate in a STA compliant

network.

• Bridge Priority - Bridge priority is used in selecting the root device,

root port, and designated port. The device with the highest priority

becomes the STA root device. However, if all devices have the same pri-

ority, the device with the lowest MAC address will then become the root

device. Enter a value from 0-65535. The lower the numeric value, the

higher the priority.

• Hello Time - Time interval (in seconds) at which the root device trans-

mits a configuration message.

• Forward Delay - The maximum time (in seconds the root device will

wait before changing states.

• Type - Shows port type as 100TX for 10Base-T/100Base-TX, or

1000T for 1000Base-T.

• Max Age - The maximum time (in seconds) a device can wait without

receiving a configuration message before attempting to reconfigure.

• Priority - Defines the priority for the use of a port in the STA algorithm.

If the path cost for all ports on a switch are the same, the port with the

highest priority (that is, lowest value) will be configured as an active link

in the Spanning Tree. When more than one port is assigned the highest

• GMRP - GMRP allows network devices to register endstations with

multicast groups.

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EtherFast^®Managed 24-Port with Dual Gigabit Switch

priority, the port with the lowest numeric identifier will be enabled. The

range is 0-255.

GMRP status, and filtering of incoming frames for VLAN groups a spe-

cific port does not belong to.

• Cost - This parameter is used by the STA algorithm to determine the best

path between devices. Therefore, lower values should be assigned to

ports attached to faster media, and higher values assigned to ports with

slower media. (This takes precedence over port priority.)

• VLAN Table Configuration - Use this screen to create a new VLAN or

modify the settings for an existing VLAN.

Select OK to return to the previous panel.

• Fast Forwarding - This parameter is used to enable/disable the Fast

VLAN Port Configuration

Spanning Tree mode for the selected port.

The VLAN Port Configuration screen allows you to configure GARP, the

default VLAN identifier, default port priority, VLAN tagging on the

attached link, GVRP and GMRP status, and filtering of incoming frames

for VLAN groups a specific port does not belong to.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes. Select Prev Page to view the previous

page. Select Next Page to view the next page.

VLAN Menu

The VLAN Menu is used to assign any port on the Switch to any of up to 256

VLAN groups. By using IEEE 802.1Q compliant VLANs, you can organize

any group of network nodes into separate broadcast domains, confining

broadcast traffic to the originating group. This also provides a more secure

and cleaner network environment.

GARP

Group Address Registration Protocol is used by GVRP and GMRP to reg-

ister or deregister client attributes for client services within a bridged

LAN.

• Join Time - The interval (centiseconds) between transmitting

requests/queries to participate in a group.

• VLAN Port Configuration - Configure GARP, the default VLAN identi-

• Leave Time - The interval (centiseconds) a port waits before leaving a

fier, default port priority, VLAN tagging on the attached link, GVRP and

group. This time should be set to more than twice the Join Time. This

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EtherFast^®Managed 24-Port with Dual Gigabit Switch

ensures that after a Leave or Leave All message has been issued, the

VLAN Table Configuration

applicants can re-join before the port actually leaves the group.

The VLAN Table Configuration screen is used to create a new VLAN or

modify the settings for an existing VLAN.

• Leave All Time - The interval (centiseconds) between sending out a

Leave All query message for group participants and the port leaving the

group. This interval should be considerably larger than the Leave Time to

minimize the amount of traffic generated by nodes rejoining the group.

VLAN and Priority

These fields set the default values for VLANs, port priority, GVRP, and

GMRP.

• Port VID - The VLAN ID assigned to untagged frames received on this

port.

• Port Default Priority - Sets the default ingress priority to any value

beneath the priority threshold to specify the low priority queue, or to any

value equal to or above this threshold to specify the high priority queue.

• VLAN Tagging - Indicates whether or not VLAN tags will be included

on frames passing through this port.

• GVRP - Enables or disables GVRP for this port. When disabled, any

GVRP packets received on this port will be discarded and no GVRP reg-

istrations will be propagated from other ports. Note: GMVP must be

enabled for the Switch before this setting can take effect.

• VLAN - The ID for the VLAN currently displayed. The range is 1-2048.

• Port - Port entries may be marked as:

–

(Normal) Uses GVRP to determine port membership.

(Static) Adds port as a static entry. GVRP protocol

is disabled.

• GMRP - Enables or disables GMRP for this port. When enabled, this

port will allow endstations to register with multicast groups. Note:

GMRP must be enabled for the Switch before this setting can take effect.

(Registration Fixed) Adds port as a static entry. GVRP

protocol messages are still forwarded through this port.

(Forbidden) Disables GVRP for this VLAN on the

specified port.

• Ingress Filtering - If enabled, incoming frames for VLANs that do not

include this ingress port in their member set will be discarded at the

ingress port.

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply. Select Add to add a VLAN.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes. Select Prev Port to view the previous

port. Select Next Port to view the next port. To display a specific port, set the

port number in the Page field and then press Apply.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

IP Menu

Subnet Configuration

The IP Menu is used to configure the IP subnets for each VLAN on your

Switch, the unicast and multicast routing protocols, and IGMP. This menu is

only available for a Switch in multilayer mode.

The Subnet Configuration screen allows you to specify an IP interface for

any VLAN configured on this Switch that needs to communicate with a

device outside of its own group (that is, another network segment).

• IP Address - The IP address associated with the specified VLAN inter-

face. By convention, the last three digits should be set to “254” to readily

distinguish this device as a router port.

• Subnet Configuration - Specifies the IP interface for VLANs configured

on this Switch, including the subnet address and routing protocols.

• Protocol Configuration - Enables the unicast and multicast routing pro-

tocols globally for this Switch.

• Subnet Mask - A template that identifies the address bits in the host

address used for routing to specific subnets. Each bit that corresponds

to a “1” is part of the network/subnet number, and each bit that

corresponds to “0” is part of the host number.

• Static ARP Configuration - Specifies the static Address Resolution

Protocol.

• VLAN - The VLAN associated with this IP interface.

• RIP - Routing Information Protocol for unicast routing.

• DVMRP - Distance-Vector Multicast Routing Protocol.

Select Apply to make changes. Select OK to return to the previous panel.

• Static Route - Configures a static route.

• Default Route - Defines the router to which this Switch will forward all

traffic for unknown networks.

Select OK to return to the previous panel.

Select Cancel to cancel any changes. Select Prev Page to view the previous

page. Select Next Page to view the next page. To display a specific page, set

the page number in the Page field and then press Apply. Select Add to add

an IP interface.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Add Subnet

Protocol Configuration

The Add Subnet screen allows you to add an IP interface.

The Protocol Configuration screen is used to globally enable or disable

unicast or multicast routing protocols for the Switch.

• VLAN - The VLAN associated with this IP interface.

• ARP - Address Resolution Protocol. Select Advanced for additional

• Select - Use this option to create or modify a VLAN.

configuration.

• IP Address - The IP address associated with the specified VLAN

• Proxy ARP - Proxy Address Resolution Protocol.

interface.

• RIP - Routing Information Protocol for unicast routing. Select

• Subnet Mask - A template that identifies the address bits in the

Advanced for additional configuration.

host address used for routing to specific subnets.

• DHCP Relay - Dynamic Host Configuration Protocol relay. Select

Advanced for additional configuration.

• Proxy ARP - Proxy Address Resolution Protocol.

• RIP - Routing Information Protocol for unicast routing.

• DVMRP - Distance-Vector Multicast Routing Protocol.

Select OK to confirm the changes. Select Cancel to cancel any changes.

• IGMP Snooping - IGMP multicast filtering. Select Advanced for add-

tional configuration. (See page 64.)

• DVMRP - Distance-Vector Multicast Routing Protocol.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

ARP Configuration

RIP Configuration

The ARP Configuration screen allows you to specify the timeout

duration.

The RIP Configuration screen allows you to specify the how

routers exchange routing table information.

• ARP Timeout - Duration of timeout (in minutes).

• RIP Update Time - Duration of timeout (in seconds).

• Default Route Advertisement - Default route messages.

• Static Route Advertisement - Static route messages.

• Ignore Host Route - Does not use host routes.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

BOOTP Relay Database Configuration

Static ARP Table

The BOOTP Relay Database Configuration screen allows you to

specify the IP address for a BOOTP relay server.

The Static ARP Table screen is used to specify the static Address

Resolution Protocol.

• Index Server Address - Used to define any preferred DHCP

servers or the outbound subnetwork for relaying a DHCP request

broadcast. (Up to five entries are permitted.)

Select OK to return to the previous panel. Select Add to add another entry.

Add BOOTP Relay Server

• IP Address - IP address statically mapped to a physical MAC address.

• MAC Address - MAC address statically mapped to the corresponding

IP address.

The Add BOOTP Relay Server screen allows you to add an entry.

• Interface - The index number of the IP interface that will use this static

ARP entry. (Port “0” refers to the CPU.)

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply. Select Add to add a static ARP entry.

• IP Address - IP address of server.

Select OK to return to the previous panel. Select Cancel to cancel any

changes.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Add Static ARP Entry

Static Route Table

The Add Static ARP Entry screen is used to add a static ARP entry.

The Static Route Table screen is used to configure a static route.

• Destination Network - A destination network, subnet, or host.

• IP Address - IP address statically mapped to a physical MAC

address.

• Destination Mask - The subnet mask that specifies the bits to match.

A routing entry will be used for a packet if the bits in the address set by

the destination mask match the destination network.

• MAC Address - MAC address statically mapped to the correspon-

ding IP address.

• VLAN - The VLAN within which the gateway or destination address

• Interface - The index number of the IP interface that will use

resides.

this static ARP entry. (Port “0” refers to the CPU.)

• Next Hop - The IP address of the router at the next hop.

Select OK to return to the previous panel. Select Cancel to cancel any

changes.

• Type - The IP route type for the destination network.

Direct - A directly connected subnetwork

Indirect - A remote IP subnetwork or host address

Myself - A switch IP address on a specific IP subnetwork

Bcast - A subnetwork broadcast address

Mcast - An IP multicast address

Invalid - An illegal IP address to be filtered

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply. Select Add to add a routing entry.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Add Routing Entry

Default Route Menu

The Add Routing Entry screen is used to add a routing entry.

The Default Route Menu screen is used to define a route to which this

Switch will forward all traffic for unknown networks.

• IP Address - IP address of static ARP entry.

• VLAN - The VLAN which has the IP interface to the default router.

• Next Hop Address - The IP address of the default router.

• MAC Address - MAC address of static ARP entry.

• Interface - Identification number for interface of static ARP entry.

• Metric - The number of hops required to reach the default router.

• Routing Metric - Indicate the number of hopes to the destination

network.

Select Delete to delete the route. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

Select OK to return to the previous panel. Select Cancel to cancel any

changes.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Security Menu

MAC Filtering Configuration

The Security Menu is used to configure security options.

The MAC Filtering Configuration screen allows you to filter out specified

MAC addresses. Any node that presents a security risk or is malfunction-

ing can be filtered from this Switch. Security filtering can be used to drop

all the traffic from a host device based on a specified MAC address.

• MAC Filtering Configuration - Security filtering can be used to drop all

the traffic from a host device based on a specified MAC address. Traffic

with either a source or destination address listed in the MAC Filtering

Configuration table will be filtered.

To add a MAC address, use Add. To delete an address, highlight it with the

cursor and press Enter. Select Apply to make changes. Select OK to return

to the previous panel. Select Prev Page to view the previous page. Select

Next Page to view the next page. To display a specific page, set the page

number in the Page field and then press Apply.

• Security Mode - Enable/disable the Learning mode here.

• IP Filtering Configuration - Configures IP filtering settings. (Only avail-

able when the Switch is in multilayer mode)

Select OK to return to the previous panel.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Add MAC Address Filter

IP Security Filtering Configuration

The Add MAC Address Filter screen allows you to add MAC

addresses.

Security filtering can be used to drop all the traffic from a specified IP

address. (Only available when the Switch is in multilayer mode)

• MAC Address - The MAC address of a host device attached to this

Switch.

To add an IP address, use Add. To delete an address, highlight it with the cur-

sor and press Enter. Select Apply to make changes. Select OK to return to

the previous panel. Select Prev Page to view the previous page. Select Next

Page to view the next page. To display a specific page, set the page number

in the Page field and then press Apply.

Select OK to confirm the changes. Select Cancel to cancel any changes.

Security Mode

Add IP Address Filter

The Security Mode menu is used to enable/disable the Learning function.

The Add IP Address Filter screen allows you to add IP

addresses.

• Learning Function - Enables/disables Learning function for security

filtering.

• IP Address - The IP address to be filtered.

Select Apply to make a change. Select OK to return to the previous panel.

Select Cancel to cancel any change.

Select OK to confirm the changes. Select Cancel to cancel any changes.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

IGMP Snooping Configuration

Network Monitor Menu

The IGMP Snooping Configuration allows you to set up IGMP snooping.

IGMP snooping is used to monitor for any attached hosts who want to receive

a specific multicast service. It looks up the IP Multicast Group used for this

service and adds any port that received a similar request to that group.

The Network Monitor Menu provides access to port statistics, RMON statis-

tics, address tables, VLAN registration and forwarding information, multicast

groups, and subnet addresses.

Note: This screenshot shows the Network Monitor Menu displayed by a

Layer 2 switch.

• IGMP Status* - If enabled, the Switch will monitor network traffic to

determine which hosts want to receive multicast traffic.

• Port Statistics/Statistics Menu - Displays statistics on network traffic

passing through the selected port. You have a choice of viewing port or

RMON statistics.

• IGMP Router Timeout - A switch port that stops receiving multicast pro-

tocol packets for this interval will be removed from the IGMP forwarding

list. The range is 3-5 minutes.

• Layer 2 Address Table - Displays detailed statistical information for the

selected port such as packet type and frame size counters.

• IGMP Group Timeout - The time between last spotting an IGMP Report

message for an IP multicast address on a specific port and the Switch

removing that entry from its list. The range is 3-5 minutes.

• Bridge Menu - The Bridge menu displays settings for the Spanning Tree

Algorithm, as well as the global bridge settings for GMRP (GARP

Multicast Registration Protocol) and GVRP (GARP VLAN Registration

Protocol), traffic classes priority threshold, and address aging time.

• Act as IGMP Querier* - If enabled, the Switch will query other devices

in regards to IGMP.

• VLAN Menu - Includes learned ports in the VLAN Dynamic Registration

Information table, and the ports that are currently forwarding VLAN traf-

fic in the VLAN Forwarding Information table.

* These options are not available when the Switch is in multilayer mode.

Select Apply to make changes. Select OK to return to the previous panel.

Select Cancel to cancel any changes.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

• IP Multicast Registration Table - Displays all the multicast groups active

on this Switch, including the multicast IP address and the corresponding

VLANs. (Only displayed for Layer 2 mode. When the Switch is in multi-

layer mode, IP Multicast Registration Table is available through the IP

Menu.)

Port Statistics

Port Statistics display key statistics from the Interfaces Group and

Ethernet-like MIBs for each port. Error statistics on the traffic passing

through each port are displayed. This information can be used to identify

potential problems with the Switch (such as a faulty port or unusually

heavy loading). The values displayed have been accumulated since the last

system reboot.

• IP Menu - Displays information regarding a variety of IP settings, includ-

ing subnets, ARP table, routing table, and multicast groups. (Not shown in

screenshot. Only available in multilayer mode)

Select the required port.

Select OK to return to the previous panel.

Port Statistics/Statistics Menu

The Port Statistics/Statistics Menu allows you to view the port or RMON sta-

tistics.

Interfaces Group

• In Octets - The total number of octets received on the interface, includ-

ing framing characters.

• In Non-Unicast Pkts - The number of non-unicast (that is, subnetwork-

broadcast or subnetwork-multicast) packets delivered to a higher-layer

protocol.

• Port Statistics - Displays statistics on network traffic passing through the

selected port. You have a choice of viewing port or RMON statistics.

• In Discards - The number of inbound packets which were chosen to be

discarded even though no errors had been detected to prevent their being

deliverable to a higher-layer protocol. One possible reason for discarding

such a packet could be to free up buffer space.

• RMON Statistics - Displays statistics for each port from RMON group 1

(RMON groups 2, 3, and 9 can only be accessed using SNMP manage-

ment software).

Select OK to return to the previous panel.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

• In Errors - The number of inbound packets that contained errors pre-

• Drop Events - The total number of events in which packets were

venting them from being deliverable to a higher-layer protocol.

dropped due to lack of resources.

• Alignment Errors - The number of alignment errors (mis-synchronized

• Octets - Number of octets passing through this port.

data packets).

• Multiple Collisions - A count of successfully transmitted frames for

• Out Octets - The total number of octets transmitted out of the interface,

which transmission is inhibited by more than one collision.

including framing characters.

• Late Collisions - The number of times that a collision is detected later

• Out Unicast Pkts - The total number of packets that higher-level proto-

cols requested be transmitted to a subnetwork-unicast address, including

those that were discarded or not sent.

than 512 bit-times into the transmission of a packet.

• Carrier Sense Errors - The number of times that the carrier sense con-

dition was lost or never asserted when attempting to transmit a frame.

• Out Non-Unicast Pkts - The total number of packets that higher-level

protocols requested be transmitted to a non-unicast (that is, a subnet-

work-broadcast or subnetwork-multicast) address, including those that

were discarded or not sent.

• Fragments - The total number of frames received that were less than 64

octets in length (excluding framing bits, but including FCS octets) and

had either an FCS or alignment error.

• Out Discards - The number of outbound packets which were chosen to

be discarded even though no errors had been detected to prevent their

being transmitted. One possible reason for discarding such a packet

could be to free up buffer space.

• Jabbers - The total number of frames received that were longer than

1518 octets (excluding framing bits, but including FCS octets), and had

either an FCS or alignment error.

Select Apply to make changes. Select Refresh to refresh the statistics. Select

• Out Errors - The number of outbound packets that could not be trans-

mitted because of errors.

OK to return to the previous panel. Select Reset to reset a specific statistic.

Select Reset All to reset the all statistics. Select Prev Port to view the previ-

ous port. Select Next Port to view the next port. To display a specific port,

set the port number in the Port field and then press Apply.

• CRC Errors - Number of Ethernet Cyclic Redundancy Check errors

detected by this device.

Ethernet-Like

• Single Collisions - The number of successfully transmitted frames for

which transmission is inhibited by exactly one collision.

• Deferred Transmissions - A count of frames for which the first trans-

mission attempt on a particular interface is delayed because the medium

was busy.

• Excessive Collisions - The number of frames for which transmission

failed due to excessive collisions.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

RMON Statistics

• Undersize Frames - The total number of frames received that were less

than 64 octets long (excluding framing bits, but including FCS octets)

and were otherwise well formed.

The RMON Statistics screen provides access to a broad range of statistics,

including a total count of different frame types and sizes passing through

each port. The values displayed have been accumulated since the last sys-

tem reboot.

• Oversize Frames - The total number of frames received that were longer

than 1518 octets long (excluding framing bits, but including FCS octets)

and were otherwise well formed.

Select the required port.

• Fragments - The number of outbound packets that could not be trans-

mitted because of errors.

• CRC Errors - The total number of frames received that were less than

64 octets long (excluding framing bits, but including FCS octets) and had

either an FCS or alignment error.

• Jabbers - The total number of frames received that were longer than

1518 octets long (excluding framing bits, but including FCS octets) and

had either an RCS or alignment error.

• Collisions- The best estimate of the total number of collisions on this

Ethernet segment.

• 64 Byte Frames - The total number of frames (including bad packets)

received and transmitted that were 64 octets in length (excluding framing

bits, but including FCS octets).

• Drop Events - The total number of events in which packets were

dropped due to lack of resources.

• 65-127 Byte Frames - The total number of frames (including bad pack-

ets) received and transmitted where the number of octets fall within the

specified range (excluding framing bits, but including FCS octets).

• Received Bytes - Total number of bytes of data received on the network.

This statistic can be used as a reasonable indication of Ethernet utiliza-

tion.

• 128-255 Byte Frames - The total number of frames (including bad pac-

ets) received and transmitted where the number of octets fall within the

specified range (excluding framing bits, but including FCS octets).

• Received Frames - The total number of frames (bad, broadcast, and mul-

ticast) received.

• 256-511 Byte Frames - The total number of frames (including bad pack-

ets) received and transmitted where the number of octets fall within the

specified range (excluding framing bits, but including FCS octets).

• Broadcast Frames - The total number of good frames received that were

directed to the broadcast address. This does not include multicast packets.

• 512-1023 Byte Frames - The total number of frames (including bad

packets) received and transmitted where the number of octets fall within

the specified range (excluding framing bits, but including FCS octets).

• CRC/Alignment Errors - The number of CRC/alignment errors (FCS or

alignment errors).

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

• 1024-1518 Byte Frames - The total number of frames (including bad

Bridge Menu

packets) received and transmitted where the number of octets fall within

the specified range (excluding framing bits, but including FCS octets).

The Bridge Menu is used to display settings for the Spanning Tree Algorithm,

as well as the global bridge settings for GMRP (GARP Multicast Registration

Protocol) and GVRP (GARP VLAN Registration Protocol), traffic classes

priority threshold, and address aging time.

• 1519-1536 Byte Frames - The total number of frames (including bad

packets) received and transmitted where the number of octets fall within

the specified range (excluding framing bits, but including FCS octets).

Select Apply to make changes. Select Refresh to refresh the statistics. Select

OK to return to the previous panel. Select Reset to reset a specific statistic.

Select Reset All to reset the all statistics. Select Prev Port to view the previ-

ous port. Select Next Port to view the next port. To display a specific port,

set the port number in the Port field and then press Apply.

Layer 2 Address Table

The Unicast Address Table contains the MAC addresses associated with each

port (that is, the source port associated with the address).

• Spanning Tree Bridge Information - Displays a full list of STA values

used for the bridge.

• Spanning Tree Port Information - Displays a list of STA values used for

each port, including status, designated cost, designated bridge, and desig-

nated port.

Select OK to return to the previous panel.

• Address - The MAC address of a node seen on this Switch.

• Port - The port whose address table includes this MAC address.

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Spanning Tree Bridge Information

• Root Cost - The path cost from the root port on this Switch to the root

device.

The STA Bridge Information screen displays a summary of STA informa-

tion for the overall bridge.

• Root Port - The number of the port on this Switch that is closest to the

root. This Switch communicates with the root device through this port. If

there is not root port, then this Switch has been accepted as the root

device of the Spanning Tree network.

• Configuration Changes - The number of times the Spanning Tree has

been reconfigured.

• Topology Up Time - The time since the Spanning Tree was last recon-

figured.

Select OK to return to the previous panel.

Spanning Tree Port Information

The STA Port Information screen displays a summary of STA information

for the various ports.

• Priority - Device priority is used in selecting the root device, root port,

and designated port. The device with the highest priority becomes the

STA root device. However, if all devices have the same priority, the

device with the lowest MAC address will then become the root device.

• Hello Time - The time interval (in seconds) at which the root device

transmits a configuration message.

• Max Age - The maximum time (in seconds) a device can wait without

receiving a configuration message before attempting to reconfigure.

• Forward Delay - The maximum time (in seconds) the root device will

wait before changing states (i.e., listening to learning to forwarding).

• Hold Time - The minimum interval between the transmission of consec-

utive Configuration BPDUs.

• Type - Shows port type as:

• Designated Root - The priority and MAC address of the device in the

Spanning Tree that this switch has accepted as the root device.

100TX 10BaseT/100Base-TX

1000T 1000Base-T

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

• Status - Displays current state of this port within the Spanning Tree:

VLAN Information

Disabled

No link has been established on this port.

Otherwise, the port has been disabled by the user

or has failed diagnostics.

The VLAN Information screen offers access to information on the ports that

have been automatically learned via GVRP and all the ports that have been

configured by dynamic or static means to forward VLAN traffic.

Blocking

Listening

Port received STA configuration messages, but

does not forward packets.

Port will leave blocking state due to a topology

change, starts transmitting configuration messages,

but does not yet forward packets.

Learning

Port has transmitted configuration messages for an

interval set by the Forward Delay parameter with

out receiving contradictory information. Port

address is cleared, and the port begins learning

addresses.

Forwarding

The port forwards packets, and continues learning

addresses.

• Designated Cost - The cost for a packet to travel from this port to the

root in the current Spanning Tree configuration. The slower the media,

the higher the cost.

• VLAN Dynamic Registration Information - Shows the ports that have

been automatically learned via GVRP.

• Designated Bridge (ID) - The priority and MAC address of the device

through which this port must communicate to reach the root of the

Spanning Tree.

• VLAN Forwarding Information - Shows all the ports that have been con-

figured by either dynamic or static means to forward VLAN traffic.

Select OK to return to the previous panel.

• Designated Port (ID) - The priority and number of the port on the des-

ignated bridging device through which this Switch must communicate

with the root of the Spanning Tree.

• Root Cost - The path cost from the root port on this Switch to the root

device.

Select OK to return to the previous panel.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

VLAN Dynamic Registration Information

VLAN Forwarding Information

The VLAN Dynamic Registration Information screen shows the ports that

have been automatically learned via GVRP.

The VLAN Forwarding Information screen shows all the ports that have

been configured by either dynamic or static means to forward VLAN traf-

fic.

• VLAN - The ID for the VLAN.

• Port - The ports on the Switch. Read the numbers vertically; they range

from 1-26. For each port number, there are two choices:

• Port - The ports on the Switch. Read the numbers vertically; they range

from 1-26. For each port number, there are two choices:

If the letter “D” is present, it indicates that the port has been auto-

matically learned via GVRP.

If the letter “D” is present, it indicates that the port has been con-

figured by dynamic means.

If there is no letter “D,” it indicates that the port has not been

automatically learned via GVRP.

If the letter “S” is present, it indicates that the port has been con-

figured by static means.

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply.

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

IP Multicast Registration Table

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply.

The IP Multicast Registration Table displays all the multicast groups active on

the Switch, including the multicast IP address and the corresponding VLANs.

IP Menu

The IP Menu displays information regarding a variety of IP settings, includ-

ing subnets, ARP table, routing table, and multicast groups. (Only available in

multilayer mode).

• VLAN - A VLAN with host members that have asked to receive the indi-

cated multicast service.

• Multicast IP - A source IP address that represents a specific multicast

service.

• Subnet Information - Displays settings for the IP interface of VLANs.

• (Multicast Group Port Lists) - The ports that belong to the indicated

VLAN group. Read the numbers vertically; they range from 1-26. For

each port number, there are two choices:

• ARP Table - Shows the IP-to-MAC addresses discovered by ARP.

• Routing Table - Shows the routes through which all recognized Ethernet

If the letter “M” is present, it indicates that the VLAN has access to

messages transmitted by that particular port.

networks (and the corresponding VLAN) can be reached.

• Multicast Table - Displays all the multicast groups active on this Switch,

including the multicast IP address and the corresponding VLANs. (See

page 80.)

If there is no letter “M,” then there is no access to messages trans

mitted by that particular port.

• Learned by - Shows if this entry was learned dynamically or via IGMP

Snooping. An entry is learned dynamically if a multicast packet was seen

crossing the port, or via IGMP Snooping if an IGMP registration packet

was seen crossing the port.

Select OK to return to the previous panel.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Subnet Information

ARP Table

The Subnet Information screen displays information about the IP interface

for VLANs configured on this Switch.

The ARP Table shows the IP-to-MAC addresses discovered by ARP.

• IP Address - The IP address associated with the specified VLAN inter-

• IP Address - IP addresses for which ARP has resolved the physical

face.

address through a broadcast message.

• Subnet Mask - A template that identifies the address bits in the host

• MAC Address - MAC address that maps to the corresponding IP

address used for routing to specific subnets.

address.

• VLAN - The VLAN associated with this IP interface.

• VLAN - The VLAN group this host has been assigned to.

• (Ports) - The ports on the Switch.

• Port - The port this host device is attached to.

Read the numbers vertically; they range from 1-26. For each port

number, there are two choices: “S” or “P.” Use the spacebar to

scroll through the choices.

Select OK to return to the previous panel. Select First Page to view the first

page. Select Next Page to view the next page.

The letter “S” indicates a static entry.

The letter “P” indicates the port is a static entry, and the port’s PVID

is set to this VLAN ID.

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Routing Table

• Protocol - How the route was learned.

The Routing Table lists the routes through which all recognized Ethernet

networks (and corresponding VLAN) can be reached.

Local: Manually configured

Mgmt: Set via SNMP

ICMP: Obtained via ICMP redirect

RIP: Learned via RIP protocol

Other: Learned by some other method

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply. Select Flush RIP to flush the RIP protocol.

Multicast Table Menu

The Multicast Table Menu offers a variety of multicasting settings.

• Destination Network - A destination network, subnet, or host.

• Destination Mask - The subnet mask that specifies the bits to match.

• VLAN - The VLAN within which the gateway or destination address

resides.

• Next Hop - The IP address of the router at the next hop.

• Type - The IP route type for the destination network.

Direct: A directly connected subnetwork

Indirect: A remote IP subnetwork or host address

Myself: A switch IP address on a specific IP subnetwork

Bcast: A subnetwork broadcast address

• Multicast Registration Table - Displays all the multicast groups active

on the Switch, including the multicast IP address and the corresponding

VLANs. (See page 80.)

Mcast: An IP multicast address

Invalid: An illegal IP address to be filtered

• IGMP Cache - Cache for IGMP.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

• Multicast Forwarding Cache Table - Cache for multicast forwarding.

• Expire - The time remaining before this entry will be aged out.

(The default is 260 seconds.)

• DVMRP Routing Table - Routing table for Distance-Vector Multicast

Routing Protocol.

• V1 Timer - The time remaining until the Switch assumes that there

are no longer any IGMP Version 1 members on the IP subnet

attached to this interface. (The default is 400 seconds.) If the

Switch receives an IGMP Version 1 Membership Report, it sets a

timer to note that there are Version 1 hosts present which are mem-

bers of the group for which it heard the report. If there are Version

1 hosts present for a particular group, the Switch will ignore any

Leave Group messages that it receives for that group.

• DVMRP Neighbor Table - Table of neighbors for Distance-Vector

Multicast Routing Protocol.

Select OK to return to the previous panel.

IGMP Cache

The IGMP Cache screen shows the settings for the IGMP cache.

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply.

• Group Address - An IP multicast group address with subscribers

directly attached or downstream from this Switch.

• Intf - The IP interface on this Switch that has received traffic

directed to the IP multicast group address.

• Reporter - IP address of the source of the last membership report

received for this multicast group on this interface. If no member-

ship report has been received, this object has the value 0.0.0.0.

• Up Time - The time elapsed since this entry was created.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Multicast Forwarding Cache

DVMRP Routing Table

The Multicast Forwarding Cache displays the settings for the

cache.

The DVMRP Routing Table shows the routes for the Distance-

Vector Multicast Routing Protocol.

• Group Address - An IP multicast group address with subscribers

• Source Address - The IP subnetwork at the root of the multicast

directly attached or downstream from this Switch.

delivery tree. This subnetwork contains a known multicast source.

• Source Address - The IP subnetwork at the root of the multicast

• Mask - Subnet mask that is used for the source address. This mask

delivery tree. This subnetwork contains a known multicast source.

identifies the host address bits used for routing to specific subnets.

• Mask - Subnet mask that is used for the source address. This mask

• Upstream Nbr - The IP address of the network device immediately

identifies the host address bits used for routing to specific subnets.

upstream for this multicast delivery tree.

• Upstream Nbr - The IP address of the network device immediately

• Interface - The IP interface on this Switch that connects to the

upstream for this group.

upstream neighbor.

• Protocol - The multicast routing protocol associated with this

• Metric - The metric for this interface used to calculate distance

entry.

vectors.

• Up Time - The time elapsed since this entry was created.

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply.

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

DVMRP Neighbor Table

System Restart Menu

The DVMRP Neighbor Table shows information about the neighbors

used for the Distance-Vector Multicast Routing Protocol.

The System Restart Menu resets the management agent.

• Interface - The IP interface on this Switch that connects to the

upstream neighbor.

• Reload Factory Defaults- Reloads the factory defaults.

• Neighbor Address - The IP address of the network device

• [Restart] - Restarts the Switch.

immediately upstream for this multicast delivery tree.

Note: When restarting the system, it will always run the Power-On Self-

Test. It will also retain all system information, unless you select to reload

the factory defaults.

• UpTime- The time since this device last became a DVMRP neigh-

bor to this Switch.

• ExpireTime - The time remaining before this entry will be aged

Select Restart to restart the Switch. Select Cancel to cancel the system

out.

restart.

• Ver - The neighboring router’s DVMRP version number.

• RcvRoute - The total number of routes received in valid DVMRP

packets from this neighbor. This can be used to diagnose problems

such as unicast route injection, as well as giving an indication of

the level of DVMRP route exchange activity.

Select Apply to make changes. Select OK to return to the previous panel.

Select Prev Page to view the previous page. Select Next Page to view the

next page. To display a specific page, set the page number in the Page field

and then press Apply.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Exit

Troubleshooting

The Exit command under the Main Menu is used to exit the configuration

program and terminate communications with the Switch for the current ses-

sion.

Common Problems and Solutions

This section provides possible solutions to problems regarding the installation

and operation of the Managed 24-Port with Dual Gigabit Switch. If your situ-

ation is described here, the problem should be solved by applying the corre-

sponding solution. If you can’t find an answer here, check the Linksys web-

site at www.linksys.com.

If you need to return to the program, press Enter repeatedly.

1. I can’t connect to the Managed 24-Port with Dual Gigabit Switch using the

telnet, Web browser, or SNMP software.

• Be sure you have configured the agent with a valid IP address, subnet

mask, and default gateway (Layer 2).

• Check that you have a valid network connection to the Switch and that

the port you are using has not been disabled.

• Check the network cabling between the management station and the

Switch.

• If you cannot connect using telnet, there may already be four active

sessions. Try connecting again at a later time.

2. I forgot or lost the password.

• Reinstall the switch firmware as described in the Appendix. Otherwise,

contact Linksys Technical Support for help.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Console Port to 25-Pin DTE Port on PC

3. I can’t access the on-board configuration program via a serial port configura-

tion.

• Be sure you have set the terminal emulator program to VT100 compati-

ble, 8 data bits, 1 stop bit, no parity, and 19200 bps.

• Check that the null-modem serial cable conforms to the pin-out con-

nections provided below.

DB-9 Port Pin Assignments

Console Port to 9-Pin COM Port on PC

Console Port to 25-Pin DCE Port on Modem

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

3. Change your baud rate to the selected value, and press Enter to enable

download. From the terminal emulation program, select the file you want

to download, set the protocol to XModem, and then initialize download-

ing.

Appendix

Upgrading Firmware via the Serial Port

You can upgrade system firmware by connecting your computer to the serial

port on the Switch and using a console interface package that supports the

XModem protocol.

Note: If you use Windows Hyperterminal, disconnect it. Set the baud

rate, and reconnect it.

Note: The download file should be a binary file or an image file; other-

wise, the agent will not accept it.

1. Restart the system by using the Restart System command, or by pulling

out the power cord to reset the power, waiting five seconds, and plugging

it back in.

4. After the file has been downloaded, the console screen will display infor-

mation similar to that shown below. Press Enter to download to perma-

nent memory, and change the baud rate back to 19200. Press Enter to

start decompressing the new firmware, and then press Enter to open the

Logon screen.

2. When the system initialization screen appears as shown below, press “D”

to download system firmware, and then indicate the code type (<r>

Runtime image or <d> Diagnostic image).

XModem Download to 0x00400020: ... SUCCESS !

(P)ermanent or (T)emporary Download: [P]

Update RunTime Image at 0x03040000 ... ... SUCCESS !

Change to original Baud Rate and Press <ENTER> to Run

Application !!!

POST Version V2.55.A03 8/18/2000

------ Power-On SElf Test (POST) ------

Int. Loopback Testing SCC2 UART Channel...PASS

Testing the System SDRAM

...PASS

Decompress now...... !!!

Int. Loopback Testing _____UART Channel ...PASS

run-time code starting now. !!! Starting System ...

MAINBOARD OCTOPUS0 RAMBIST TEST ...... PASS!

MAINBOARD OCTOPUS1 RAMBIST TEST ...... PASS!

MAINBOARD OCTOPUS2 RAMBIST TEST ...... PASS!

MAINBOARD OCTOPUS3 RAMBIST TEST ...... PASS!

MAINBOARD DOLPHIN RAMBIST TEST ...... PASS!

MAINBOARD STARFISH RAMBIST TEST ...... PASS!

CPU Self Test

FlashROM CheckSum Test

...PASS

!!! If you want to download image file, Please press <D>

to download:

!!!

Download Runtime image, press <r>

Download Diagnostic image, press <d>

Clear the system parameter block, press <c>r

Press <Enter> to start UI

Please input the Baud Rate as following:

Press 1: Baud Rate = 9600

Press 2: Baud Rate = 19200

Your firmware has now been updated.

Press 3: Baud Rate = 38400

Press 4: Baud Rate = 57600

Press 5: Baud Rate = 115200

Select a number and then press <ENTER> !!! 5

Please change local console BaudRate to exact rate and

press <ENTER>!!!

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

“categories” (the singular is commonly referred to as “CAT”) of twisted pair

cabling systems (wires, junctions, and connectors) in terms of the data rates

that they can sustain. CAT 3 cable has a maximum throughput of 16Mbps and

is usually utilized for 10BaseT networks.

Glossary

10BaseT - An Ethernet standard that uses twisted wire pairs.

CAT 5 - ANSI/EIA (American National Standards Institute/Electronic

Industries Association) Standard 568 is one of several standards that specify

“categories” (the singular is commonly referred to as “CAT”) of twisted pair

cabling systems (wires, junctions, and connectors) in terms of the data rates

that they can sustain. CAT 5 cable has a maximum throughput of 100Mbps and

is usually utilized for 100BaseTX networks.

100BaseTX - IEEE physical layer specification for 100Mbps over two pairs of

Category 5 UTP wire.

1000BASE-T - Provides half-duplex (CSMA/CD) and full-duplex 1000Mbps

Ethernet service over Category 5e links as defined by ANSI/TIA/EIA-568-A.

Topology rules for 1000Base-T are the same as those used for 100Base-TX.

Category 5e link lengths are limited to 100 meters by the ANSI/TIA/EIA-568-

A cabling standard. Only one CSMA/CD repeater will be allowed in a collision

domain.

CAT 5e - The additional cabling performance parameters of return loss and far-

end crosstalk (FEXT) specified for 1000Base-T and not specified for 10Base-T

and 100Base-TX are related to differences in the signaling implementation.

10Base-T and 100Base-TX signaling is unidirectional—signals are transmitted

in one direction on a single wire pair. In contrast, Gigabit Ethernet is bi-direc-

tional—signals are transmitted simultaneously in both directions on the same

wire pair; that is, both the transmit and receive pair occupy the same wire pair.

Adapter - Printed circuit board that plugs into a PC to add capabilities or con-

nectivity to a PC. In a networked environment, a network interface card (NIC)

is the typical adapter that allows the PC or server to connect to the intranet

and/or Internet.

Data Packet - One frame in a packet-switched message. Most data communi-

cations is based on dividing the transmitted message into packets. For example,

an Ethernet packet can be from 64 to 1518 bytes in length.

ARP (Address Resolution Protocol) - A TCP/IP protocol used to figure out a

host’s Ethernet address from its Internet address.

DHCP (Dynamic Host Configuration Protocol) - A protocol that lets network

administrators manage centrally and automate the assignment of Internet

Protocol (IP) addresses in an organization’s network. Using the Internet’s set of

protocol (TCP/IP), each machine that can connect to the Internet needs a

unique IP address. When an organization sets up its computer users with a con-

nection to the Internet, an IP address must be assigned to each machine.

Without DHCP, the IP address must be entered manually at each computer, and,

if computers move to another location in another part of the network, a new IP

address must be entered. DHCP lets a network administrator supervise and dis-

tribute IP addresses from a central point and automatically sends a new IP

address when a computer is plugged into a different place in the network.

DHCP uses the concept of a “lease” or amount of time that a given IP address

will be valid for a computer. The lease time can vary depending on how long a

user is likely to require the Internet connection at a particular location. It’s

especially useful in education and other environments where users change fre-

quently. Using very short leases, DHCP can dynamically reconfigure networks

in which there are more computers than there are available IP addresses.

Auto-negotiate - To automatically determine the correct settings. The term is

often used with communications and networking. For example, Ethernet

10/100 cards, hubs, and switches can determine the highest speed of the node

they are connected to and adjust their transmission rate accordingly.

Backbone - The part of a network that connects most of the systems and net-

works together and handles the most data.

Bandwidth - The transmission capacity of a given facility, in terms of how

much data the facility can transmit in a fixed amount of time; expressed in bits

per second (bps).

BOOTP (BOOTstrap Protocol) - A TCP/IP protocol that lets a device connect-

ed to the network be automatically configured and booted up. An IP address is

automatically assigned for a specific length of time.

DHCP supports static addresses for computers containing Web servers that

need a permanent IP address.

CAT 3 - ANSI/EIA (American National Standards Institute/Electronic

Industries Association) Standard 568 is one of several standards that specify

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

DVMRP (Distance-Vector Multicast Routing Protocol) - Used for routing multi-

cast messages through the Internet.

IEEE - The Institute of Electrical and Electronics Engineers. The IEEE

describes itself as “the world’s largest technical professional society—promot-

ing the development and application of electrotechnology and allied sciences

for the benefit of humanity, the advancement of the profession, and the well-

being of our members.”

Dynamic Routing - The ability for a router to forward data via a different route

based on the current conditions of the communications circuits. For example, it

can adjust for overloaded traffic or failing lines and is much more flexible than

static routing, which uses a fixed forwarding path.

The IEEE fosters the development of standards that often become national and

international standards. The organization publishes a number of journals, has

many local chapters, and has several large societies in special areas, such as the

IEEE Computer Society.

Ethernet - IEEE standard network protocol that specifies how data is placed on

and retrieved from a common transmission medium. Has a transfer rate of

10Mbps. Forms the underlying transport vehicle used by several upper-level pro-

tocols, including TCP/IP and XNS.

IGMP (Internet Group Management Protocol) - A multicast host registration

protocol that allows any host to inform its local router that it wants to receive

transmissions addressed to a specific multicast group.

Fast Ethernet - A 100 Mbps technology based on the 10Base-T Ethernet

CSMA/CD network access method.

LAN - A local area network (LAN) is a group of computers and associated

devices that share a common communications line and typically share the

resources of a single processor or server within a small geographic area (for

example, within an office building).

Full Duplex - The ability of a device or line to transmit data simultaneously in

both directions.

GARP (General Attributes Registration Protocol) - A standard for registering or

deregistering client attributes for client services within a bridged LAN.

Latency - The time delay between when the first bit of a packet is received and

the last bit is forwarded.

GMRP (GARP Multicast Registration Protocol) - Allows network devices to

ing network devices or endstations comply with the IEEE 802.1p standard.

Layer 2 - Data Link layer in the ISO 7-Layer Data Communications Protocol.

This is directly related to the hardware interface for network devices and pass-

es traffic based on MAC addresses.

GVRP (GARP VLAN Registration Protocol) - Defines a way for switches to

exchange VLAN information in order to register VLAN members on ports

across the network.

Layer 3 - Network layer in the ISO 7-Layer Data Communications Protocol.

This layer handles the routing functions for data moving from one open system

to another.

Half Duplex - Data transmission that can occur in two directions over a single

line, but only one direction at a time.

MAC Address - The MAC (Media Access Control) address is your computer’s

unique hardware number.

Hardware - Hardware is the physical aspect of computers, telecommunications,

and other information technology devices. The term arose as a way to distinguish

the “box” and the electronic circuitry and components of a computer from the pro-

gram you put in it to make it do things. The program came to be known as the soft-

ware.

Mbps (MegaBits Per Second) - One million bits per second; unit of measure-

ment for data transmission.

Multicast Routing Protocol - A routing protocol that supports multicast pack-

ets (one to many).

Hub - The device that serves as the central location for attaching wires from

workstations. Can be passive, where there is no amplification of the signals; or

active, where the hubs are used like repeaters to provide an extension of the

cable that connects to a workstation.

Multicasting - Sends data to a group of nodes instead of a single destination.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Network - A system that transmits any combination of voice, video, and/or

data between users.

STP (Spanning Tree Protocol) - A technology that checks your network for any

loops. A loop can often occur in complicated or back-up linked network sys-

tems. Spanning-tree detects and directs data along the shortest path, maximiz-

ing the performance and efficiency of the network.

NIC (Network Interface Card) - A board installed in a computer system, usu-

ally a PC, to provide network communication capabilities to and from that com-

puter system. Also called an adapter.

Static Routing - Forwarding data in a network via a fixed path. Static routing

cannot adjust to changing line conditions as can dynamic routing.

Port - A pathway into and out of the computer or a network device such as a

switch or router. For example, the serial and parallel ports on a personal com-

puter are external sockets for plugging in communications lines, modems, and

printers.

Subnet Mask - The method used for splitting IP networks into a series of sub-

groups, or subnets. The mask is a binary pattern that is matched up with the IP

address to turn part of the host ID address field into a field for subnets.

Port Trunk - Defines a network link aggregation and trunking method, which

specifies how to create a single high-speed logical link that combines several

lower-speed physical links.

TFTP (Trivial File Transfer Protocol) - A version of the TCP/IP FTP protocol

that has no directory or password capability.

Throughput - The amount of data moved successfully from one place to anoth-

RIP (Routing Information Protocol) - A simple routing protocol that is part of

the TCP/IP protocol suite. It determines a route based on the smallest hop count

between source and destination. RIP is a distance vector protocol that routine-

ly broadcasts routing information to its neighboring routers and is known to

waste bandwidth. AppleTalk, DECnet, TCP/IP, NetWare, and VINES all use

incompatible versions of RIP.

er in a given time period.

TX Rate - Transmission Rate.

Unicast Routing Protocol - A routing protocol that does not support multicast.

UTP - Unshielded twisted pair is the most common kind of copper telephone

wiring. Twisted pair is the ordinary copper wire that connects home and many

business computers to the telephone company. To reduce crosstalk or electro-

magnetic induction between pairs of wires, two insulated copper wires are

twisted around each other. Each signal on twisted pair requires both wires.

Since some telephone sets or desktop locations require multiple connections,

twisted pair is sometimes installed in two or more pairs, all within a single

cable.

RJ-45 (Registered Jack-45) - A connector similar to a telephone connector that

holds up to eight wires, used for connecting Ethernet devices.

RMON (Remote MONitoring) - RMON provides comprehensive network

monitoring capabilities. It eliminates the polling required in standard SNMP,

and can set alarms on a variety of traffic conditions, including specific error

types.

SNMP (Simple Network Management Protocol) - A widely used network mon-

itoring and control protocol. Data is passed from SNMP agents, which are

hardware and/or software processes reporting activity in each network device

(hub, router, bridge, etc.) to the workstation console used to oversee the net-

work. The agents return information contained in a MIB (Management

Information Base), which is a data structure that defines what is obtainable

from the device and what can be controlled (turned off, on, etc.).

VLAN (Virtual LAN) - A logical association that allows users to communicate

as if they were physically connected to a single LAN, independent of the actu-

al physical configuration of the network.

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EtherFast^®Series

EtherFast^®Managed 24-Port with Dual Gigabit Switch

Warranty Information

BE SURE TO HAVE YOUR PROOF OF PURCHASE AND A BARCODE

FROM THE PRODUCT’S PACKAGING ON HAND WHEN CALLING.

RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF

PURCHASE.

Specifications

Model Number

Standards

EF24G2M

IEEE 802.1D, IEEE 802.1p, IEEE 802.1Q,

IEEE 802.3, IEEE 802.3ab, IEEE 802.3u,

IEEE 802.3x

Protocol

Ports

CSMA/CD

24 10/100Base-TX RJ-45 Ports

2 1000Base-T RJ-45 Ports

1 RS-232 DB-9 Port

IN NO EVENT SHALL LINKSYS’ LIABILITY EXCEED THE PRICE PAID

FOR THE PRODUCT FROM DIRECT, INDIRECT, SPECIAL, INCIDEN-

TAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE

OF THE PRODUCT, ITS ACCOMPANYING SOFTWARE, OR ITS DOCU-

MENTATION. LINKSYS DOES NOT OFFER REFUNDS FOR ANY PROD-

UCT.

Speed Per Port (Mbps)

10/100 Ports

10 or 100 (Half Duplex)

20 or 200 (Full Duplex)

1000 (Half Duplex)

2000 (Full Duplex)

32k

64k

1522 Bytes

4MB

1000 Ports

LINKSYS OFFERS CROSS SHIPMENTS, A FASTER PROCESS FOR PRO-

CESSING AND RECEIVING YOUR REPLACEMENT. LINKSYS PAYS

FOR UPS GROUND ONLY. ALL CUSTOMERS LOCATED OUTSIDE OF

THE UNITED STATES OF AMERICA AND CANADA SHALL BE HELD

RESPONSIBLE FOR SHIPPING AND HANDLING CHARGES. PLEASE

CALL LINKSYS FOR MORE DETAILS.

MAC Addresses

Max Frame Size

Buffer Memory

Cabling Type

UTP Category 5 or Better (10/100)

UTP Category 5e or Better (1000)

Power,

LEDs

FD/Col (per Port),

Link/Act (per Port)

Environmental

Dimensions

16.93" x 13.78" x 1.75"

(430mm x 350mm x 44.4mm)

8.38 lbs. (3.8kg)

Unit Weight

Power Input

Power Consumption

Certifications

100-240V AC, 50-60Hz

60 watts

FCC Class A

Operating Temp.

Storage Temp.

Operating Humidity

Storage Humidity

0° C to 40° C (32° F to 104° F)

-10° C to 70° C (-14° F to 158° F)

10 % to 95 % Non-Condensing

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EtherFast^®Series

Contact Information

For help with the installation or operation of this product, contact Linksys

Customer Support at one of the phone numbers or Internet addresses below.

Sales Information

Tech Support

RMA Issues

Fax

800-546-5797 (LINKSYS)

888-793-5932

949-261-1288

949-261-8868

Web

FTP Site

[email protected]

http://www.linksys.com

ftp.linksys.com

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Printed in the USA.

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