3Com Family Switch 7750
Installation Guide
3C16896 8-slot AC Chassis
3C16897 8-slot DC Chassis
3C16895 7-slot Chassis
3C16894 4-slot Chassis
and associated modules
Part No. 10016428-AB
Published December 2007
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ABOUT THIS GUIDE
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4
CONTENTS
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ABOUT THIS GUIDE
®
This guide describes the 3Com Switch 7750 and how to install hardware,
configure and boot software, and maintain software and hardware. This guide
also provides troubleshooting and support information for your switch.
This guide is intended for qualified Service personnel who are responsible for
configuring, using, and managing the switches. It assumes a working knowledge
of local area network (LAN) operations and familiarity with communication
protocols that are used to interconnect LANs.
Always download the Release Notes for your product from the 3Com World Wide
Web site and check for the latest updates to software and product documentation
Conventions
Table 1 Notice Icons
Icon
Notice Type
Description
Information note
Information that describes important features or
instructions.
Caution
Warning
Information that alerts you to potential loss of data
or potential damage to an application, system, or
device.
Information that alerts you to potential personal
injury.
Related
Documentation
The following manuals offer additional information necessary for managing your
Switch 7750:
■
Switch 7750 Command Reference Guide — Provides detailed descriptions of
command line interface (CLI) commands, that you require to manage your
Switch 7750.
■
■
Switch 7750 Configuration Guide— Describes how to configure your Switch
7750 using the supported protocols and CLI commands.
Switch 7750 Release Notes — Contains the latest information about your
product. If information in this guide differs from information in the release
notes, use the information in the Release Notes.
These documents are available in Adobe Acrobat Reader Portable Document
Format (PDF) on the 3Com World Wide Web site at http://www.3com.com/.
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6
ABOUT THIS GUIDE
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SWITCH 7750 COMPONENTS
1
The chapter describes the following Switch 7750 components:
■
■
■
■
■
■
■
■
■
■
Switch Chassis
hardware features of each model.
Table 2 Hardware Features of the Switch 7750 Models
8-Slot Chassis
AC 3C16896
DC 3C16897
4-Slot Chassis
3C16894
7-Slot Chassis
3C16895
Fabric slots
I/O module slots
Fan slot
1
3
1
2
1
6
1
3
2
6
2
3
AC/DC Power module
slots
Switch Backplane
The Switch 7750 backplane is part of the integrated chassis and delivers
high-speed data transfer between the Fabric and I/O modules. The backplane
bandwidth capacity is 96 Gbps.
The backplane supports the following functions:
■
■
■
■
■
Interconnection of signals between modules
Provides communication channels
Hot swapping for modules
Automatic recognition of slots
Distribution of power and management of the power supply for the system
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8
CHAPTER 1: SWITCH 7750 COMPONENTS
Fabric Module
There are three Fabric modules for the Switch 7750:
■
■
■
Fabric 64 (3C16857 or 3C16857R)
Fabric 32 (3C16872)
PoE Fabric 96 (3C16886)
The Fabric 64 and Fabric 32 are not interchangeable. You can install the Fabric 32
only in a 4-slot chassis. You can install the Fabric 64 only in the 7-slot or 8-slot
chassis. You can install the PoE Fabric 96 in all three chassis.
The Fabric module is the core of Switch 7750 system. It has the following
functions:
■
Connects the I/O modules through the backplane and forwards Layer 2 and
Layer 3 data
■
■
■
Manages and calculates routing
Performs the switch’s software upgrade and system reset functions
Monitors system power and the fan frame
Figure 1 illustrates the front panel of the PoE Fabric 96.
Figure 1 PoE Fabric 96
3C16886
1
2
3
8
4 5 6
9
7
1 Compact Flash port
2 1000BASE-X-SFP ports
3 Console port
4 Ethernet port
5 Ethernet port LEDs
6 Fan LEDs
7 Power LEDs
8 I/O module LEDs
9 Reset button
Figure 2 illustrates the front panel of the Fabric 64.
Figure 2 Fabric 64
3C16857
5 6
7
1
2
3
4
1 Reset button
2 Console port
3 Ethernet port
4 Ethernet port LEDs
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Fabric Module
9
5 Fan LEDs
6 Power module LEDs
7 I/O module LEDs
Figure 3 illustrates the front panel of the Fabric 32.
Figure 3 Fabric 32
3C16872
1
2
3
4 5 6
7
8
1 Submodule slot
2 Console port
3 Ethernet port
4 Ethernet port LEDs
5 Fan LEDs
6 Power LEDs
7 I/O module LEDs
8 Reset button
Table 3 Fabric Specifications
PoE Fabric 96
Fabric 64 (3C16857
or 3C16857R)
Item
(3C16886)
96 Gbps
MPC8245
512 KB
Fabric 32 (3C16872)
Bandwidth
CPU
64 Gbps
32 Gbps
MPC8260 200 Mhz
1 MB
BootROM
SDRAM
256 M
256 MB
Flash
32 MB
16 MB
Submodule slot
Dimensions (L x W)
1
366.7 mm x 340 mm (14.5 x 13.5 in)
External ports
One console port that supports local and remote dial-up configuration
management of the switch.
One 10BASE-T/100BASE-TX port for upgrade and network
management
One Compact Flash
port for storing log
and host version and
for online software
upgrades
Four 1000BASE-X-SFP
ports
Maximum power
consumption
80 W
80 W
70 W (with
submodule)
Submodule Slot The submodule slot in the Fabric 32 offers extended Ethernet capacity using the
following submodules:
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10
CHAPTER 1: SWITCH 7750 COMPONENTS
■
■
4-port 1000BASE-X-GBIC submodule
4-port 10/100/1000BASE-T submodule
For more information on these submodules, see “Fabric 32 Submodules”on
Fixed Ports The Switch 7750 Fabric modules provide the following fixed ports:
■
■
■
■
1000BASE-X-SFP (PoE Fabric 96 only)
Compact Flash (CF) Port
The Fabric module provides a CF port to accommodate a standard CF card, where
you can save logging information, host version information, alarming and other
diagnostic information. You can also use the CF port to upgrade software online.
1000BASE-X-SFP Ports
the SFP cables for these ports.
Table 4 Cables for 1000BASE-T-SFP Modules
Maximum
Central
Wavelength
transmission
SFP Module
Connector Matching Cable distance
1000BASE-SX-SFP
850 nm
LC
50/125 µm
multimode
optical fiber
cable
550 m (1804 ft.)
62/125 µm
multimode
optical fiber
cable
275 m (902 ft.)
1000BASE-LX-SFP
1000BASE-LH-SFP
1310 nm
9/125 µm single 10 km (6 mi.)
mode optical
30 km (19 mi.)
fiber cable
1000BASE-ZX-LR-SFP 1550 nm
1000BASE-ZX-VR-SFP
40 km (25 mi.)
70 km (43 mi.)
100 m (328 ft.)
1000BASE-T-FD-SFP
RJ-45
Table 5 SFP Port LEDs
LED
Description
LINK/ACT
Off — The line is not connected.
Green — The line is connected.
Green flashing — Data is being transmitted or received.
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Fabric Module
11
Console Port
The console port is connected to the configuration terminal using an RJ-45
connector. You can use the console port for system debugging, configuration,
maintenance, management, and loading application files.
The console port can also be connected to a modem for functions such as remote
system debugging, configuration, maintenance, and management. You can
configure the baud rate on the console port.
Table 6 Console Port Specifications
Specification
Port connector
Port standard
Baud rate
Description
RJ-45
Asynchronous EIA/TIA-232
9600 bps (by default)
15 m (45 ft)
Transmission distance
Services
Connects with character terminal
Connects with local or remote PC serial port and runs terminal
emulation on a PC (a pair of modems are required for a
remote connection)
Ethernet Port
The Ethernet port on the Fabric is connected to a computer using an RJ-45
connector. You can use the Ethernet port for system application downloading and
debugging. The Ethernet port can also be connected to devices such as a network
management workstation to manage the system remotely.
Table 7 Ethernet Port Specifications
Specification
Port connector
Number of port(s)
Port speed
Description
RJ-45
1
10 Mbps, half/full duplex
100 Mbps, half/full duplex
MDI/MDIX auto sensing
Cable and maximum transmission Category-5 twisted pair for transmission within 100 m
distance
(328 ft)
Port function
Switch software upgrade and network management
connector and MDI/MDI-X pinout details.
Table 8 Ethernet Port LEDs
LED
Description
LINK
Off — The line is not connected.
Green — The line is connected.
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12
CHAPTER 1: SWITCH 7750 COMPONENTS
Table 8 Ethernet Port LEDs (continued)
LED
Description
ACTIVE
Green — No data is being transmitted or received.
Green flashing — Data is being transmitted or received.
Table 9 I/O Module LEDs
LED
Status description
RUN
Green or off — The module failed or has not been inserted.
Green flashing — The module is working normally.
ALM
Off — The module is working normally or has not been
inserted.
Green or green flashing — The module failed or is not
working normally.
Power LEDs PWR1, PWR2, and PWR3 LEDs show the status of the power modules, as
Table 10 Power LEDs
LED
Description
OK
Green — The corresponding power module is working
normally.
Off — The corresponding power module is not working or
has not been installed.
FAIL
Green — The corresponding power module is not working.
Off — The corresponding power module works normally or
has not been installed.
Table 11 Fan LEDs
LED
Description
OK
Green — The fan is working normally.
Off — The fan is not working or has not been installed.
FAIL
Green — The fan is not working.
Off — The fan is working normally or has not been installed.
Reset Button The reset button resets the entire system.
Fabric 32 Submodules
The Fabric 32 provides a slot for one submodule. The Fabric 32 supports the
following submodules:
■
4-Port 1000BASE-X-GBIC Submodule (3C16874)
4-Port 10/100/1000BASE-T Submodule (3C16873)
■
4-Port 1000BASE-X-GBIC The 4-port 1000BASE-X-GBIC submodule provides four GE full-duplex Ethernet
Submodule GBIC ports.
Figure 4 illustrates the 4-port 1000BASE-X-GBIC submodule.
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Fabric 32 Submodules
13
Figure 4 4-Port 1000BASE-X-GBIC Submodule
3C16874
1
2
Ethernet GBIC port
2 Ethernet GBIC port LED
Table 12 4-Port 1000BASE-X-GBIC Submodule LEDs
LED
Description
LINK/ACT
Green — The link is operating normally.
Off — The link is not operating.
Green flashing — Data is being transmitted or received.
submodule.
Table 13 4-Port 1000BASE-X-GBIC Submodule Specifications
Max.
Optional GBIC
Module
Central
Connector Interface Fiber
Transmission
Wavelength Type
Specifications
Distance
1000BASE-SX-MM
(3CGBIC91)
850 nm
SC
50/125 µm
multi-mode fiber
62.5/125 µm
500 m (1640 ft)
220 m (722 ft)
Multi-mode fiber
1000BASE-LX-SM-IR 1310 nm
(3CGBIC92)
SC
SC
9/125 µm
Single-mode fiber
10 km (6 mi)
1000BASE-LX-SM
(3CGBIC97)
1550 nm
9/125 µm
Single-mode fiber
40 km (25 mi)
70 km (43.5 mi)
4-Port The 4-Port 10/100/1000BASE-T submodule provides four 10/100/1000 Mbps
10/100/1000BASE-T auto-negotiation service ports.
Submodule
Figure 5 illustrates the 4-port 10/100/1000BASE-T submodule.
Figure 5 4-Port 10/100/1000BASE-T Submodule
3C16873
1
2
1 Ethernet port
2 Ethernet port LEDs
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CHAPTER 1: SWITCH 7750 COMPONENTS
Table 14 4-Port 10/100/1000BASE-T Submodule LEDs
LED
Description
LINK
Off — The link is not operating.
On — The link is operating normally.
ACT
Off — No data is being transmitted or received.
Green flashing — Data is being transmitted or received.
Table 15 4-Port 10/100/1000BASE-T Submodule Specifications
Specification
Connector type
Number of ports
Port speed
Description
RJ-45
4
1000 Mbps full duplex
100 Mbps half/full duplex
10 Mbps half/full duplex
MDI/MDI-X auto-sensing
Cable and maximum
transmission distance
Category 5 twisted pair up to 100 m (328 ft)
See “Electrical Port Connector” on page 78 for an illustration of the RJ-45
connector and MDI/MDI-X pinout details.
I/O Modules
The Switch 7750 provides multiple slots for I/O modules below the Fabric slots.
The following I/O modules are supported:
■
■
■
■
■
■
■
■
■
■
■
■
48-port 10/100BASE-T FE PoE Module (3C16891)
48-port 10/100/1000BASE-T PoE Module (3C16890)
48-port 10/100BASE-TX FE Module (3C16889)
48-port 10/100/1000BASE-T Module (3C16888)
20-Port 10/100/1000BASE-T Module (3C16863A)
20-Port 1000BASE-X-SFP Module (3C16862A)
8-port 1000BASE-X GBIC Module (3C16858)
8-port 10/100/1000BASE-T GE Module (3C16859)
100Base-FX SFP mode (3C16865915)
Consider the following when selecting I/O modules:
■
You can configure several I/O modules of the same type
■
Any combination of I/O modules can be inserted but only PoE I/O modules
provide the features of power over Ethernet.
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I/O Modules
15
■
You must select I/O module port cables that are compatible with each installed
I/O module
48-port 10/100BASE-T FE The 48-port 10/100BASE-T FE PoE module provides 48 10/100 Mbps auto-sensing
PoE Module Ethernet ports that provide a remote power supply to powered devices
Figure 12illustrates the 48-port 10/100BASE-T FE PoE module.
Figure 6 48-port 10/100BASE-T FE PoE Module
Figure 13 illustrates the front panel and LEDs of the 48-port 10/100BASE-T FE PoE
module.
Figure 7 Front Panel of the 48-port 10/100BASE-T FE PoE Module
3C16891
2
1
1 Ethernet port
2 Ethernet port LED
Table 16 module LED
LED
Description
LINK/ACT
Green — The port is connected.
Off — The port is not connected.
Green flashing — Data is being transmitted or received.
Table 17 Specifications for the 48-port 10/100BASE-T FE PoE Module
Specification
CPU
Description
MPC8241
BootROM
512 KB
SDRAM
128 M
Dimensions (L X W)
366.7 x 340 mm (14.4 x 13.4 in.)
Maximum power consumption 35 W
Connector
RJ-45
48
Number of ports
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16
CHAPTER 1: SWITCH 7750 COMPONENTS
Table 17 Specifications for the 48-port 10/100BASE-T FE PoE Module (continued)
Specification
Description
Port transmission speed
10/100 Mbps half-/full-duplex MDI/MDI-X auto-sensing
100 m (328 ft.)
Cables and maximum
transmission distance
Maximum power each port
provides
15.4 W
Compliance
IEEE802.3
IEEE802.3u
IEEE802.3x
IEEE802.3ad
IEEE802.1p
IEEE802.1D
IEEE802.1Q
IEEE802.1X
IEEE802.1s
IEEE802.1w
IEEE802.3af
48-port The 48-port 10/100/1000BASE-T PoE module provides 48 10/100/1000 Mbps
10/100/1000BASE-T PoE auto-sensing Ethernet ports that provide a remote power supply to powered
Module devices.
Figure 12illustrates the 48-port 10/100/1000BASE-T PoE module.
Figure 8 48-port 10/100/1000BASE-T PoE Module
Figure 13 illustrates the front panel and LEDs of the 48-port 10/100/1000BASE-T
PoE module.
Figure 9 Front Panel of the 48-port 10/100/1000BASE-T PoE Module
3C16890
1
2
1 Ethernet port
2 Ethernet port LED
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I/O Modules
17
Table 18 48-port 10/100/1000BASE-T PoE Module LED
LED
Description
LINK/ACT
Green — The port is connected.
Off — The port is not connected.
Green flashing — Data is being transmitted or received.
module.
Table 19 Specifications for the 48-port 10/100/1000BASE-T PoE Module
Specification
CPU
Description
MPC8241
BootROM
512 KB
SDRAM
128 M
Dimensions (L X W)
366.7 x 340 mm (14.4 x 13.4 in.)
Maximum power consumption 70 W
Connector
RJ-45
48
Number of ports
Port transmission speed
10/100/1000 Mbps half-/full-duplex
MDI/MDIX auto-sensing
Cables and maximum
transmission distance
Category 5 twisted pair with a maximum distance of 100 m
(328 ft.)
Compliance
IEEE802.3ab
IEEE802.3
IEEE802.3i
IEEE802.3x
IEEE802.1p
IEEE802.1D
IEEE802.1Q
IEEE802.1X
IEEE802.1s
IEEE802.1w
48-port 10/100BASE-TX The 48-port 10/100BASE-TX FE module provides 48 10/100 Mbps auto-sensing
FE Module Ethernet electrical ports.
Figure 10 illustrates the 48-port 10/100BASE-T FE module.
Figure 10 48-port 10/100BASE-T FE Module
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18
CHAPTER 1: SWITCH 7750 COMPONENTS
Figure 11 illustrates the front panel and LEDs of the 48-port 10/100BASE-TX FE
module.
Figure 11 Front Panel of the 48-Port 10/100BASE-TX FE module
1
2
1 Ethernet port
2 Ethernet port LED
Each 100 Mbps Ethernet port has a green LED, indicating LINK/ACTIVE status.
Table 20 48-Port 10/100BASE-TX FE module LED
LED
Description
LINK/ACT
Green — The port is connected.
Off — The port is not connected.
Green flashing — Data is being transmitted or received.
Table 21 Specifications for the 48-Port 10/100BASE-TX FE Module
Specification
CPU
Description
MPC850
BootROM
512 KB
SDRAM
64 MB
Dimensions (L X W)
366.7 x 340 mm (14.5 x 13.4 in)
75 W
Maximum power
consumption
Connector
RJ-45
48
Number of ports
Port transmission
speed
10/100 Mbps half/full duplex
MDI/MDIX auto-sensing
Cables and maximum Cables are 2 100-ohm Category-5 twisted pairs up to 100 m (300 ft).
transmission distance
Compliance
IEEE802.3
IEEE802.3u
IEEE802.3x
IEEE802.3ad
IEEE802.1p
IEEE802.1D
IEEE802.1Q
IEEE802.1X
IEEE802.1s
IEEE802.1w
See “Electrical Port Connector” on page 78 for an illustration of the RJ-45
connector and MDI/MDI-X pinout details.
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I/O Modules
19
48-port The 48-port 10/100/1000BASE-T module provides 48 10/100/1000 Mbps
10/100/1000BASE-T auto-sensing Ethernet electrical ports.
Module
Figure 12 illustrates the 48-port 10/100/1000BASE-T module.
Figure 12 48-port 10/100/1000BASE-T Module
Figure 13 illustrates the front panel and LEDs of the 48-port 10/100/1000BASE-T
module.
Figure 13 Front Panel of the 48-port 10/100/1000BASE-T Module
3C16888
1 2
1 Ethernet port
2 Ethernet port LED
Table 22 48-port 10/100/1000BASE-T Module LED
LED
Description
LINK/ACT
Green — The port is connected.
Off — The port is not connected.
Green flashing — Data is being transmitted or received.
Table 23 Specifications for the 48-port 10/100/1000BASE-T Module
Specification
CPU
Description
MPC8241
BootROM
512 KB
SDRAM
128 M
Dimensions (L X W)
366.7 x 340 mm (14.4 x 13.4 in.)
Maximum power consumption 70 W
Connector
RJ-45
48
Number of ports
Port transmission speed
10/100/1000 Mbps half-/full-duplex MDI/MDI-X
auto-sensing
Cables and maximum
transmission distance
Category 5 twisted pair with a maximum transmission
distance of 100 m (328 ft.)
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20
CHAPTER 1: SWITCH 7750 COMPONENTS
Table 23 Specifications for the 48-port 10/100/1000BASE-T Module (continued)
Specification
Compliance
Description
1EEE 802.3ab
1EEE 802.3
1EEE 802.3u
1EEE 802.3x
1EEE 802.1p
1EEE 802.1D
1EEE 802.1Q
1EEE 802.1X
1EEE 802.1s
1EEE 802.1w
48-port 100BASE-X SFP The 48-port 100BASE-X SFP module provides 48 100 Mbps full-duplex Ethernet
Module optical ports.
Figure 14 illustrates the 48-port 100BASE-X SFP module.
Figure 14 48-port 48-port 100BASE-X SFP Module
Figure 15 illustrates the front panel and LEDs of the 48-port 100BASE-X SFP
module.
Figure 15 Front Panel of the 48-port 48-port 100BASE-X SFP Module
3C16888
1 2
1 Ethernet port
2 Ethernet port LED
Table 24 48-port 100BASE-X SFP Module LED
LED
Description
LINK/ACT
Green — The port is connected.
Off — The port is not connected.
Green flashing — Data is being transmitted or received.
Table 25 Specifications for the 48-port 100BASE-X SFP Module
Specification
CPU
Description
MPC8241
512 KB
BootROM
SDRAM
128 M
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I/O Modules
21
Table 25 Specifications for the 48-port 100BASE-X SFP Module (continued)
Specification
Description
Dimensions (L X W)
366.7 x 340 mm (14.4 x 13.4 in.)
Maximum power consumption 36.5 W
Connector
LC
48
Number of ports
SFP module
100BASE-FX-MM-SFP
100BASE-FX-SM-SFP
100BASE-FX-SM-LR-SFP
100BASE-FX-SM-VR-SFP
Port transmission speed
Compliance
100 Mbps full-duplex
1EEE 802.3
1EEE 802.3u
1EEE 802.3x
1EEE 802.3ad
1EEE 802.1p
1EEE 802.1D
1EEE 802.1Q
1EEE 802.1X
1EEE 802.1s
1EEE 802.1w
Table 26 Cables for the 48-port 100BASE-X SFP Module
Central
wave-
length
Maximum
transmission
distance
SFP module
Connector Matching cable
100BASE-FX-MM-SFP 1310nm
100BASE-FX-SM-SFP 1310nm
LC
multimode optical fiber 2 km (1.2 mi)
cable
15 km (9.3 mi)
100BASE-FX-SM-LR-S 1310nm
FP
9/125 µm single mode 40 km (24.9 mi)
optical fiber cable
100BASE-FX-SM-VR-S 1550nm
FP
70km (43 mi)
24-port 100BASE-FX The 24-port 100BASE-FX MMF FE module provides 24 100 Mbps multi-mode
MMF FE Module Ethernet optical port service channels.
Figure 16 illustrates the 24-port 100BASE-FX MMF FE module.
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22
CHAPTER 1: SWITCH 7750 COMPONENTS
Figure 16 24-Port 100BASE-FX MMF FE Module
Each 100 Mbps optical port has a green LED, as shown in Figure 17.
Figure 17 Front Panel of the 24-Port 100BASE-FX MMF FE Module
1
2
1 Ethernet port
2 Ethernet port LED
Table 27 24-Port 100BASE-FX MMF FE Module LEDs
LED
Description
LINK/ACT
Green — The port is connected.
Off — The port is not connected.
Green flashing — Data is being transmitted or received.
The 24-port 100BASE-FX MMF FE module requires a 62.5/125 µm multi-mode
optical fiber cable with an MT-RJ connector and a central wavelength of 1300 nm.
Table 28 Specifications for the 24-Port 100BASE-FX MMF FE Module
Specification
CPU
Description
MPC850
BootROM
512 KB
SDRAM
64 MB
Dimensions (L x W)
366.7 x 340 mm (14.5 x 13.4 in)
55 W
Maximum power
consumption
Connector type
MT-RJ
Number of ports
24
Port transmission speed
100 Mbps, full-duplex
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I/O Modules
23
Table 28 Specifications for the 24-Port 100BASE-FX MMF FE Module (continued)
Specification
Description
Cables and maximum
transmission distance
62.5/125 µm multi-mode optical fiber up to 2 km (1.3 mi)
Compliance
IEEE 802.3
IEEE 802.3i
IEEE 802.3u
IEEE 802.3x
20-Port The 20-Port 10/100/1000BASE-T module provides 20 10/100/1000BASE-T
10/100/1000BASE-T auto-sensing Ethernet ports.
Module
Figure 18 illustrates the 20-Port 10/100/1000BASE-T Module.
Figure 18 20-Port 10/100/1000BASE-T Module
Figure 19 illustrates the front panel of the 20-port 10/100/1000BASE-T module.
Figure 19 Front Panel of the 20-Port 10/100/1000BASE-T Module
3C16863
1
2
1 Ethernet port
2 Ethernet port LED
Table 29 20-Port 10/100/1000BASE-T Module LEDs
LED
Description
LINK/ACT
Off — The port is not operating.
On — The port is operating.
Green flashing — The port is transmitting or receiving data
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24
CHAPTER 1: SWITCH 7750 COMPONENTS
Table 30 Specifications for the 20-Port 10/100/1000BASE-T Module
Specification
CPU
Description
MPC8241LZU200
BootROM
512 KB
SDRAM
64 MB
Dimensions (L x W)
Power consumption
Connector
366.7 x 340 mm (14.5 x 13.4 in)
45 W
RJ-45
20
Number of ports
Transmission rate
10 Mbps half/full duplex
100 Mbps half/full duplex
1000 Mbps full duplex
Cable and maximum
transmission distance
Category-5 twisted pair
100 m (300 ft)
Compliance
IEEE 802.3ab
IEEE 802.3
IEEE 802.3u
IEEE 802.3x
IEEE 802.1D
IEEE 802.1Q
20-Port 1000BASE-X-SFP The 20-port 1000BASE-X-SFP module provides 20 1000 BASE-X full duplex ports
Module and uses an SFP cable.
Figure 20 illustrates the 20-port 1000BASE-X-SFP module.
Figure 20 20-Port 1000BASE-X-SFP Module
Figure 21 illustrates the front panel of the 20-port 1000BASE-X-SFP module.
Figure 21 Front Panel of the 20-Port 1000BASE-X-SFP Module
3C16862
1
2
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I/O Modules
25
1 Ethernet port
2 Ethernet port LED
Table 31 20-Port 1000BASE-X-SFP Module LEDs
LED
Description
LINK/ACT
Off — The port is not operating.
On — The port is operating.
Green flashing — The port is transmitting or received data
Table 32 Specifications for the 20-Port 1000BASE-X-SFP Module
Specification
CPU
Description
MPC8241LZU200
BootROM
512 KB
SDRAM
64 MB
Dimensions (L x W)
Power consumption
Connector
366.7 x 340 mm (14.5 x 13.4 in)
35 W
SFP socket
Number of ports
Transmission rate
20
1000 Mbps full duplex
Cable and maximum
transmission distance
1000BASE-SX-SFP (multi-mode optical fiber, short haul)
1000BASE-LX-SFP (single mode optical fiber, 1310 nm)
1000BASE-LH-SFP (single mode optical fiber, 1310 nm)
1000BASE-ZX-LR-SFP (single mode optical fiber, 1550 nm)
1000BASE-ZX-VR-SFP (single mode optical fiber, 1550 nm)
Compliance
IEEE 802.3z
IEEE 802.1p
IEEE 802.1Q
IEEE 802.1D
IEEE 802.3x
IEEE 802.3ad
12-port The 12-port 10/100/1000BASE-T and 4-port 1000BASE-X SFP module provides 12
10/100/1000BASE-T 10/100/1000 BASE-T ports and 4 1000BASE-X ports.
and
Figure 22 illustrates the 12-port 10/100/1000BASE-T and 4-port 1000BASE-X SFP
module.
4-port 1000BASE-X SFP
Module
Figure 22 12-port 10/100/1000BASE-T and 4-port 1000BASE-X SFP Module
3C168916
Figure 23 illustrates the front panel of the 12-port 10/100/1000BASE-T and 4-port
1000BASE-X SFP module.
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26
CHAPTER 1: SWITCH 7750 COMPONENTS
Figure 23 Front Panel of the 12-port 10/100/1000BASE-T and 4-port 1000BASE-X
SFP Module
3C168916
1
2
3
4
1 Ethernet port
2 Ethernet port LED
3 SFP port
4 SFP LED
module LEDs.
Table 33 12-port 10/100/1000BASE-T Module LEDs
LED
Description
LINK/ACT
Off — The port is not operating.
On — The port is operating.
Green flashing — The port is transmitting or receiving data.
1000BASE-X SFP module.
Table 34 Specifications for the 12-port 10/100/1000BASE-T and 4-port 1000BASE-X
SFP Module
Specification
CPU
Description
MPC8245
BootROM
512 KB
SDRAM
256 MB
Dimensions (L x W)
Power consumption
Connector
366.7 x 340 mm (14.5 x 13.4 in)
45 W
SFP socket
Number of ports
12 10/100/1000BASE-T Ethernet ports
4 1000BASE-X (SFP) Ethernet ports
Transmission rate
1000 Mbps full duplex (optical port)
10 Mbps half/full duplex (electrical port)
100 Mbps half/full duplex (electrical port)
1000 Mbps full duplex (electrical port)
Ethernet cable and maximum 100 m (328 ft) over category-5 twisted pair cable
transmission distance
Compliance
IEEE 802.3
IEEE 802.3u
IEEE 802.3z
IEEE 802.3ab
IEEE 802.1p
IEEE 802.1Q
IEEE 802.1D
IEEE 802.1X
IEEE 802.1s
IEEE 802.1w
IEEE 802.3x
IEEE 802.3ad
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I/O Modules
27
Table 35 SFP Cables for the 12-port 10/100/1000BASE-T and 4-port 1000BASE-X
SFP Module
Maximum
transmission
distance
Central
SFP module
wavelength Connector Matching cable
SFP-GE-SX-MM850-A 850nm
LC
50/125 µm multimode 550 m (1804 ft)
optical fiber cable
62.5/125 µm
multimode optical
fiber cable
275 m (902 ft)
SFP-GE-LX-SM1310-A 1310nm
SFP-GE-LH40-SM1310
LC
LC
9/125 µm single mode 10 km (6 mi)
optical fiber cable
40 km (about 25
mi)
SFP-GE-LH40-SM1550 1550nm
9/125 µm single mode 40 km (about 25
optical fiber cable
mi)
SFP-GE-LH70-SM1550
70 km (43 mi)
100km (62 mi)
SFP-GE-LH100-SM155
0
SFP-GE-LH70-SM1470 1470nm
-CW
LC
LC
LC
LC
LC
LC
LC
LC
RJ45
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1490 1490nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1510 1510nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1530 1530nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1550 1550nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1570 1570nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1590 1590nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1610 1610nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-T
-
-
100m (328 ft)
12-port 1000BASE-X SFP The 12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T module provides 12
and 1000BASE-X SFP ports and 4 10/100/1000BASE-X SFP ports.
4-port
10/100/1000BASE-T
Figure 24 illustrates the 12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T
module.
Module
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28
CHAPTER 1: SWITCH 7750 COMPONENTS
Figure 24 12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T Module
Figure 25 illustrates the front panel of the 12-port 1000BASE-X SFP module.
Figure 25 Front Panel of the 12-port 1000BASE-X SFP and 4-port
10/100/1000BASE-T Module
3C168917
1
3 4
2
1 SFP port
2 SFP port LED
3 Ethernet port
4 Ethernet port LED
module LEDs.
Table 36 12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T Module LEDs
LED
Description
LINK/ACT
Off — The port is not operating.
On — The port is operating.
Green flashing — The port is transmitting and receiving data.
10/100/1000BASE-T module.
Table 37 Specifications for the 12-port 1000BASE-X SFP and 4-port
10/100/1000BASE-T Module
Specification
CPU
Description
MPC8241
BootROM
512 KB
SDRAM
64 MB
Dimensions (L x W)
Power consumption
Connector
366.7 x 340 mm (14.5 x 13.4 in)
35 W
RJ-45, LC
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I/O Modules
29
Table 37 Specifications for the 12-port 1000BASE-X SFP and 4-port
10/100/1000BASE-T Module (continued)
Specification
Description
Number of ports
Transmission rate
16
1000 Mbps full duplex (optical/electrical)
10/100 Mbps half-/full-duplex (electrical)
Cable and maximum
transmission distance
Category-5 twisted pair with maximum transmission distance
of 100 m (328 ft)
Compliance
IEEE 802.3
IEEE 802.3u
IEEE 802.3z
IEEE 802.3ab
IEEE 802.1p
IEEE 802.1Q
IEEE 802.1D
IEEE 802.1X
IEEE 802.1s
IEEE 802.1w
IEEE 802.3x
IEEE 802.3ad
Table 38 SFP Cables for the 12-port 1000BASE-X SFP and 4-port
10/100/1000BASE-T Module
Maximum
transmission
distance
Central
SFP module
wavelength Connector Matching cable
SFP-GE-SX-MM850-A 850nm
LC
50/125 µm multimode 550 m (1804 ft)
optical fiber cable
62.5/125 µm
multimode optical
fiber cable
275 m (902 ft)
SFP-GE-LX-SM1310-A 1310nm
SFP-GE-LH40-SM1310
LC
LC
9/125 µm single mode 10 km (6 mi)
optical fiber cable
40 km (about 25
mi)
SFP-GE-LH40-SM1550 1550nm
SFP-GE-LH70-SM1550
9/125 µm single mode 40 km (about 25
optical fiber cable
mi)
70 km (43 mi)
100km (62 mi)
SFP-GE-LH100-SM155
0
SFP-GE-LH70-SM1470 1470nm
-CW
LC
LC
LC
LC
LC
LC
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1490 1490nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1510 1510nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1530 1530nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1550 1550nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1570 1570nm
-CW
9/125 µm single mode 70km (43 mi)
optical fiber cable
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30
CHAPTER 1: SWITCH 7750 COMPONENTS
Table 38 SFP Cables for the 12-port 1000BASE-X SFP and 4-port
10/100/1000BASE-T Module
Maximum
transmission
distance
Central
SFP module
wavelength Connector Matching cable
SFP-GE-LH70-SM1590 1590nm
-CW
LC
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-LH70-SM1610 1610nm
-CW
LC
9/125 µm single mode 70km (43 mi)
optical fiber cable
SFP-GE-T
-
RJ45
-
100m (328 ft)
8-port 1000BASE-X GBIC The 8-port 1000BASE-X GBIC module provides 8 external GBIC module ports. A
Module GBIC module is used for each data receiving/transmitting channel. The following
modules are available:
■
■
■
3CGBIC91
3CGBIC92
3CGBIC97
Figure 26 illustrates the 8-port 1000BASE-X GBIC module.
Figure 26 8-Port 1000BASE-X GBIC Module
3C16858
Figure 27 Front Panel of the 8-Port 1000BASE-X GBIC Module
1
2
1 GBIC port
2 GBIC port LED
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I/O Modules
31
Table 39 8-Port 1000BASE-X GBIC Module LEDs
LED
Description
LINK
Off — The link is not connected
Green — The link is connected
ACT
Off — No data is being transmitted or received
Green flashing — Data is being transmitted or received
Table 40 GBIC Module Port Cables
GBIC Module Type
3CGBIC91
Central Wave Length
850 nm
3CGBIC92
1550 nm
3CGBIC97
1550 nm
Table 41 Specifications for the 8-Port 1000BASE-X GBIC Module
Specification
CPU
Description
MPC850
BootROM
512 KB
SDRAM
64 MB
Dimensions (L x W)
366.7 x 340 mm (14.5 x 13.4 in)
50 W
Maximum power
consumption
Number of ports
8
Optional GBIC module
types
3CGBIC 91
3CGBIC 92
3CGBIC 97
Port transmission speed
Compliance
1000 Mbps, full duplex
IEEE 802.3z
IEEE 802.3x
8-port The 8-port 10/100/1000BASE-T GE module provides 8 external 10/100/1000
10/100/1000BASE-T GE Mbps auto-sensing Ethernet electrical ports.
Module
Figure 28 illustrates the 8-port 10/100/1000BASE-T GE module.
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32
CHAPTER 1: SWITCH 7750 COMPONENTS
Figure 28 8-Port 10/100/1000BASE-T GE Module
Each port on the 8-port 10/100/1000BASE-T GE module has 2 LEDs, as shown in
Figure 29 Front Panel of the 8-Port 10/100/1000BASE-T GE Module
1 2
1 Ethernet port
2 Ethernet port LEDs
Table 42 8-Port 10/100/1000BASE-T GE Module LEDs
LED
Description
LINK
Off — The link is not connected.
Green — The link is connected.
ACT
Off — No data is being transmitted or received.
Green flashing — Data is being transmitted or received.
Specifications of the 8-port 10/100/1000BASE-T GE module are described in
Table 43 Specifications for the 8-Port 10/100/1000BASE-T GE Module
Specification
CPU
Description
MPC850
BootROM
512 Kb
SDRAM
64 MB
Dimensions (L x W)
366.7 x 340 mm (14.5 x 13.4 in)
Maximum power consumption 50 W
Connector type
Number of ports
RJ-45
8
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Power Module
33
Table 43 Specifications for the 8-Port 10/100/1000BASE-T GE Module (continued)
Specification
Description
Port transmission speed
10 Mbps, half/full duplex
100 Mbps, half/full duplex
1000 Mbps, full duplex
Cables and maximum
transmission distance
4 100-ohm Category-5 non-shielded twisted pairs up to 100
m (300 ft).
Compliance
IEEE 802.3ab
IEEE802.3
IEEE802.3u
IEEE802.3x
Power Module
Only one AC power module is required for the 4-slot chassis, although two power
module slots are provided to implement N+1 redundancy.
The 7-slot and 8-slot chassis provides three power module slots to implement N+1
redundancy. However, two power modules are sufficient to power one of these
fully loaded Switch 7700 systems.
specifications of each type of power module.
Table 44 Specifications for AC and DC Power Modules
Specification
Input
AC Power Module
100 V to 240 V, 47 to 63 Hz
460 W
DC Power Module
-48 V to -60 V
460 W
Maximum output
Power Distribution
The Switch 7750 power distribution box is installed on the chassis floor in the back
of the chassis. It filters, connects, disconnects, and distributes electrical current to
the switch.
The power distribution box for the 4-slot chassis has two inputs and each input
has a separate ON/OFF switch. One input can support the normal operation of one
power module. Both AC inputs must be connected and switched on to provide
power to both power modules and to offer N+1 AC power redundancy. When
two power modules are installed but only one AC power input is working, only
one power module will operate. However, the power module LEDs on the Fabric
display alarm information for the power module that is not working.
The power distribution box for the 7-slot and 8-slot chassis has two inputs and
two ON/OFF switches. One input can support the normal operation of three AC
power modules at the same time. When both AC power inputs are connected and
switched on, the power distribution box offers N+1 AC power redundancy.
External PoE Power
System
The Switch 7750 supports power-over-Ethernet (PoE). When the Switch 7750 is
equipped with an external PoE power system and PoE-capable I/O modules, it can
provide -48 V DC power to remote powered devices (PDs), such as IP phones,
WLAN APs, and network cameras through twisted pair cable.
Figure 30 illustrates the Switch 7750 PoE power system.
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34
CHAPTER 1: SWITCH 7750 COMPONENTS
Figure 30 Switch 7750 PoE Power Supply
The Switch 7750 supports PoE external input power up to 2400 W.
Table 45 PoE Power Modules
Power supplied
Power modules
needed for
Input voltage
100 to 140 V
200 to 240 V
1 Power module
2 Power module
2400 W
redundancy
1200 W
2400 W
3
2
The Switch 7750 provides power through Ethernet ports on the PoE-supported I/O
modules, supporting the maximum distance of 100 m (328 ft.).
When the Switch 7750 provides power remotely, each Ethernet port can provide
up to 15.4 W of power to the connected PD.
Fan Assembly
The fan assembly consists of two to four individual fans and is located on the right
side of the chassis:
■
■
■
4-slot chassis — 3C16871
7-slot chassis — 3C16856
8-slot chassis — 3C16855
The fans are directly connected to the backplane through connectors. Fan
operation fault signals are collected and transmitted to the system alarm board
through the backplane.
Figure 31 illustrates the fan assembly for the 7- and 8-slot chassis.
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Switch 7750 Specifications
35
Figure 31 Fan Assembly
Switch 7750
Specifications
Table 46 Specifications for the Switch 7750 System
Item
4-Slot Chassis
7-Slot Chassis
8-Slot Chassis
Dimensions
(W x H x D)
436 x 352.8 x 480 mm 436 x 486.2 x 480 mm 436 x 530.6 x 480 mm
(17 x 14 x 19 in)
50 Kg (110 lbs)
(17 x 19 x 19 in)
70 Kg (154 lbs)
(17 x 21 x 19 in)
80 Kg (177 lbs)
Weight (with all
components)
Fabric slots
1
3
1
6
2
I/O module slots
Fabric submodule
options
4-port
1000BASE-X-GBIC
4-port
10/100/1000BASE-T
8-port 1000BASE-X GE Module
1-port 10GBASE-X-XENPAK Module
PoE Fabric
performance
96 Gbps
96 Gbps
96 Gbps
64 Gbps
Fabric performance 32 Gbps
64 Gbps
Maximum
aggregate system
performance
72 Gbps
54 Mpps
144 Gbps
108 Mpps
Packet processing
24 Mpps
48 Mpps
48 Mpps
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36
CHAPTER 1: SWITCH 7750 COMPONENTS
Table 46 Specifications for the Switch 7750 System (continued)
Item
4-Slot Chassis
7-Slot Chassis
8-Slot Chassis
Input voltage
AC: 100 V to 240 V, 50 to 60 Hz
AC: 100 V to 240 V,
50 to 60 Hz
DC: -48 V to -60 V
PoE input voltage
-46 V to -55 V; 55.0 A
Max power
consumption
(all components
installed)
350 W
650 W
800 W
0
0
Environment
temperature
and
0 to 40 C (32 to 104 F) and 10% to 90%
humidity
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INSTALLING THE SWITCH 7750
2
The following sections describe how to prepare and install the components of the
Switch 7750:
■
■
■
■
■
■
■
■
■
■
■
■
■
WARNING: Only trained and qualified personnel should install and maintain
3Com products.
Preparing to Install
This section provides guidelines for preparing your site and switch for installation.
General Safety Before installing your switch, note the following safety recommendations:
Recommendations
■
■
■
■
Switch off the power supply before connecting the cables.
Keep the switch away from heat sources.
To ensure normal heat dissipation, do not stack switches.
Do not keep the switch in a damp place, and prevent liquid from getting into
the switch.
■
■
Ensure that the neutral point of the power is grounded properly, to avoid
personal injury.
Ensure that the power is off before plugging or unplugging the modules and
cables of the switch.
■
■
Before moving the chassis, disconnect all the power cords and external cables.
To avoid damage to the switch, connect all the cables correctly. Never connect
telephone cables (including the ISDN lines) to the console or AUX port.
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38
CHAPTER 2: INSTALLING THE SWITCH 7750
■
During the installation, wear an antistatic wrist strap and antistatic gloves. See
WARNING: Follow local safety regulations when performing any operation with
the Switch 7750. Follow the related safety information and special safety
instructions provided by 3Com. 3Com bears no responsibility for accidents that
occur due to violations of safe operation requirements.
Electrical Safety To maintain electrical safety, note the following recommendations:
■
Look carefully for possible hazards in your work area, such as ungrounded
power extension cables, missing safety grounds, and moist floors.
■
Locate the emergency power-off switch in the room where you are working.
Shut the power off at once in the event of an accident.
■
■
Unplug all the power cords and external cables before moving the chassis.
Never assume that power is disconnected from a circuit. Always check.
Moving the Switch Use caution when moving the Switch 7750. Note the following recommendations
when moving the switch:
■
■
■
Do not move the switch alone. Work with another person.
Move the switch slowly. Never move suddenly or twist your body.
Always disconnect all external cables (including power cord) before lifting or
moving the chassis.
■
■
■
Do not hold the power handles when carrying the switch.
Do not put fingers into the vent of the chassis when carrying the switch.
Since the power handles and vent have not been designed to bear the weight
of the entire chassis, using them to carry the switch may damage the switch or
even injure personnel.
Laser Safety Some I/O modules on the Switch 7750 have optical ports. Make sure that an
optical connector is connected to the optical ports, or a dust proof cover is fitted,
as invisible laser radiation can be emitted from the port.
WARNING: Never look at the transmit LED/laser through a magnifying device
while it is powered on. Never look directly at the fiber TX port and fiber cable ends
when they are powered on.
General Site
Requirements
The environment of the installation site influences the performance and lifetime of
the switch. The installation site for your switch should meet the requirements
described in the following sections.
Temperature and Humidity
To ensure normal operation and to prolong the operational lifetime of the switch,
the temperature and humidity of the equipment room must be within controlled
limits. The requirements for the temperature and humidity of the switch
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Installation Checklist
39
Table 47 Temperature and Humidity Requirements
Temperature
Relative humidity (noncondensing)
0
0
0
0
0 to 40 C (32 to 104 F)
10% to 90%
Static Electricity
To prevent damage caused by the static electricity, ensure that:
■
■
■
■
■
The equipment is grounded
The equipment room is dust-proof
Adequate temperature and humidity conditions are maintained.
The operator wears an antistatic wrist strap while handling the module.
The module is placed upward on the antistatic workbench, or put into an
antistatic bag.
■
Avoid direct contact with the elements of the circuit board.
Electromagnetic Discharge
To prevent damage by electromagnetic discharge, do the following:
■
■
■
Take effective measures against electrical interference for the power supply
system.
Separate the working ground of the switch from the grounding device of the
power equipment, or lightning conductor.
Adopt electromagnetic shielding if necessary.
Lightning Damage
To minimize the risk of lightning damage do the following:
■
Install a lightning arrester on the input end of a telephone cable, or other
external line.
■
■
Ensure that the PGND wire of the chassis is well grounded
Ensure that the neutral point of the socket of AC power supply is well
grounded
■
Install a lightning arrester at the input end of the power supply
Installation Space The Switch 7750 is a complex piece of equipment so it is necessary to make
arrangements for the installation position, power supply, and cabling.
For better heat dissipation and equipment maintenance, 3Com recommends that
you keep the front and back of the switch more than 1 meter (3 feet) away from
the walls or other devices. The sides of the switch should be at least 0.8 meters
(2.5 ft) away from the walls. If the optional cabinet is installed, the clear height of
room should be more than 3 meters (10 ft).
Installation Checklist
When you open the packing case of the switch, check the contents against the
your order contract. Contact your Service representative if you find any
discrepancies.
To install the Switch 7750, you will need:
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40
CHAPTER 2: INSTALLING THE SWITCH 7750
■
Tools
■
■
■
Phillips screwdriver
Flat-head screwdriver
Antistatic wrist strap
■
Cables
■
■
■
■
Console cable
AUX cable
Power cord and chassis ground wire
Interface cables for the selected interface modules
■
Equipment
■
■
■
The switch
Ethernet 100BASE-T Hub or LAN switch
Channel service unit/data service unit (CSU/DSU) or other data
communications equipment (DCE) equipment (such as a modem)
■
■
Configuration terminal, such as a PC
Additional equipment for the selected interface modules
Installing the Chassis
You can install the Switch 7750 in a standard, 19-inch cabinet or on a workbench.
Installing in a Standard When you are ready to install the Switch 7750 in the cabinet:
Cabinet
1 Carry the switch to the front of the cabinet. At least two people are required to
move the switch.
2 Put the switch on the tray or the guides and push it into the cabinet.
3 Fix the switch in the cabinet with the combination screw and floating nuts that are
shipped with the switch.
Installing on a To install the switch on a workbench, take the following precautions:
Workbench
■
■
Ensure that the workbench is smooth and stable.
Leave a heat-dissipation clearance in the front and back of the switch of more
than 1 m (3 ft) and at least 0.8 meters (2.5 ft) away from the walls on the sides.
■
Do not put heavy objects on the switch.
Installing the Cabling
Rack
To install the cabling rack:
1 Attach the rack brace to the left side of the chassis (opposite the fan frame).
2 Insert the wiring channel into the brace and fasten the screws.
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Installing a Module
41
Installing a Module
To install a module:
1 Wear an antistatic wrist strap.
2 Remove the blanking plate from the chassis slot and save it for future use.
3 Hold the ejector levers of the module with both hands and push them outward.
4 Align the module with the guides in the chassis and slide it gently into the slot.
5 Push the module until the captive thumb screw on its handle bar touches the hole
in the chassis.
6 Push the ejector levers inward and push the handle bar pin into the positioning
hole in the chassis.
7 Fasten the module’s captive mounting screws into the holes in the chassis with a
screwdriver.
Installing a
Submodule
To install a submodule in the Fabric 32 you need the following tools:
■
Phillips-head screwdriver #2
Small pliers
■
Do the following:
1 Wear an antistatic wrist strap.
2 Unfasten the screws on the Fabric 32 printed circuit board at locations M11 and
M18.
3 Unfasten and remove the submodule blanking plate from the Fabric 32.
4 Fasten the screw with guide pin on the Fabric 32 printed circuit board at location
M2.1
5 Fasten the four hexagonal stand-off bolts at M3, M4, M11, and M18 on the Fabric
32 printed circuit board. Do not overtighten these bolts.
6 Position the submodule on the four hexagonal stand-off bolts, insuring that the
guide pin on the Fabric 32 matches the guide hole of the submodule.
7 Apply pressure near the edge connectors of the submodule to insure that the
submodule connector is firmly seated.
8 Insert and fasten screws into the bolts that you installed in Step 5.
To remove the submodule, reverse this procedure.
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42
CHAPTER 2: INSTALLING THE SWITCH 7750
Connecting the
Ground Wire
To connect the ground wire:
1 Wear an antistatic wrist strap.
2 Remove the screw from the grounding hole in the switch chassis.
3 Set the ground wire connector around the grounding screw.
4 Fasten the grounding screw in the hole on the chassis.
5 Connect the other end of the ground wire to the grounding bar of the switch.
If you install the switch in a cabinet, 3Com recommends that the ground wire of
the switch be connected to the grounding bar of the cabinet.
WARNING: The resistance between switch chassis and the ground should be less
than 1 ohm.
Connecting and
Configuring Power
The Switch 7750 requires power connection from the AC or DC power source and
from the PoE power rack.
Connecting AC Power To connect AC power cords:
Cords
1 Power off all the related parts of the switch before connecting the AC power cord
2 Plug the power cords into the sockets in the switch and attach the retention clips
to the power cord plugs.
3 Plug the other end of the cords into a socket strip with surge protector. Connect
the strip to the power source in the room.
Figure 32 illustrates the AC power cord connection.
Figure 32 AC Power Cord Connection
1 AC power sockets
2 Retention clips
3 Grounding screw
WARNING: For surge protection, the power should be channelled through an
external protection device into the Switch 7750.
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Connecting and Configuring Power
43
Connecting DC Power To connect DC power cords, do the following:
Cords
1 Power off all the related parts of the switch when connecting the DC power cord.
2 Loosen the mounting screw and remove the cover of the connection terminals on
the DC power distribution box.
3 Loosen the mounting nut of the connection terminal, using a socket wrench.
4 Connect the -48 V terminal (with a blue wire) of the DC power cord on the switch
to the terminal marked with -48 V and fasten the nut.
5 Connect the grounding terminal (with a black wire) of the DC power cord of the
switch to the return terminal and fasten the mounting nut with socket wrench.
6 Cover the connection terminals and fasten the mounting screws.
7 Connect the other end of the DC power cord to the connection terminal for
power input to the switch.
Figure 33 Connecting the DC Power Cord
1
2
3
4
1 -48 V input
2 Return
3 Grounding screw
4 Fastening screw
Configuring AC Power The dual AC input power module uses an internal switch that automatically selects
Sources the primary power source. However, to select the primary power source manually,
do the following:
1 Connect the first power cord to the AC source or backup system that you select as
the primary power source for the chassis.
2 Power on the switch. The power module will receive power from the AC source
you connected to.
3 Connect the second power cord to the second AC source or backup system.
If the primary AC source fails, the switch automatically fails over to the secondary
AC source. There is no disruption to system operation during the power fail-over.
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44
CHAPTER 2: INSTALLING THE SWITCH 7750
Connecting the PoE Follow these steps to connect the power cord from the PoE rack:
Power Cord
1 Loosen the mounting screw of the PoE terminal block on the rear panel of the
switch.
2 Insert the -48V OT terminal of the DC power cord to the NEG (-) terminal of the
switch and fasten the mounting screw; insert the other end to the NEG (-) terminal
Figure 34 Back of the PoE Rack
1 PoE external power input: NEG (-)
2 (+) PoE external power input: NEG (+)
3 COM port (external power monitor)
3 Insert the GND OT terminal of the DC power cord to the RTN (+) terminal of the
switch and fasten the mounting screw; insert the other end to the NEG (-) terminal
of the site power.
Figure 35 Front Panel of the PoE Rack
1 AC input socket
2 DC output terminal: NEG (-)
3 DC output terminal: RTN (+)
4 RS232 serial port
4 Insert the PGND OT terminal of the DC power cord to the grounding screw of the
switch and fasten the mounting screw; insert the other end to the grounding bar
for the switch.
For detailed instructions on how to install the PoE rack, see the Switch 7750 PoE
Rack Installation Guide.
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Installing the Fan Assembly
45
Installing the Fan
Assembly
To install the fan:
1 Wear an antistatic wrist strap.
2 Remove the fan frame from the pack.
3 Hold the ejector levers on the fan frame with both hands and push them outward.
4 Align the fan with the guides in the chassis and slide it gently into the slot.
5 Push the fan until its positioning pin touches the hole in the chassis.
6 Push the ejector levers inward.
7 Push the handle bar pin into the hole in the chassis.
WARNING: To avoid injury, do not touch any naked wire, terminal, or any other
part of the product labelled Dangerous Voltage. Always wear the antistatic wrist
strap when installing the fan.
Installing Cables
This section describes how to connect console and AUX cables to the Switch
7750.
Connecting the Console The console cable is an 8-core shielded cable. One end of the cable has a crimped
Cable RJ-45 connector, which is plugged into the console port of the switch. The other
end has both a DB-9-hole connector and a DB-25-hole connector for connection
to a 9-hole or 25-hole serial port at the configuration terminal.
To connect a terminal or PC to the Switch 7750 using the console cable:
1 Plug the DB-9 or DB-25 female plug of the console cable to the serial port of the
PC or the terminal where the switch is to be configured.
2 Connect the RJ-45 connector of the console cable to the console port of the
switch.
Connecting the AUX An AUX cable is used to connect the Switch 7750 to a modem in a remote dial-up
Cable configuration.
The AUX cable is an 8-core shielded cable. One end of the cable is an RS-232
RJ-45 connector, which is used to plug into the switch at the console port. The
other end has both a DB-9-pin connector and a DB-25 pin for connection to a
9-hole or 25-hole serial port on the virtual modem.
To connect the AUX cable:
1 Plug the RJ-45 end of the AUX cable into the switch console port.
2 Connect the DB-25 or DB-9 end of the AUX cable to the serial port of the virtual
modem.
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46
CHAPTER 2: INSTALLING THE SWITCH 7750
Connecting Module This section describes how to connect electrical and optical cables.
Cables
Connecting Electrical Port Cables
The 48-port 10/100BASE-T module and 8-port 10/100/1000BASE-T module
require a RJ-45 connector and category-5 twisted pair cable. See “Electrical Port
pinout details.
Use the following steps to connect the port:
1 Plug one end of the straight-through cable into the Ethernet RJ-45 port of the
switch.
2 Plug the other end of the straight-through cable into
the RJ-45 port of the hub or LAN Switch.
Ports on 48-port 10/100BASE-T and 8-port 10/100/1000BASE-T modules support
MDI/MDI-X auto-sensing.
Connecting Optical Fiber Cables
The following modules require fiber optic cables:
■
■
■
24-port 100BASE-FX MMF FE module
20-port 1000BASE-X-SFP module
1000BASE-SX-MM, 1000BASE-LX-SM-IR, and 1000BASE-LX-SM optional GBIC
modules for the 4-port 1000BASE-X-GBIC submodule
When connecting optical fiber cables, use the fiber connectors that are
appropriate for the optical port type of the peer equipment that is connected to
for illustrations of the fiber optic cable connectors.
Single-mode optical fiber cable is used for external connections of the single-mode
optical port. Multi-mode optical fiber cable is used for external connections of the
multi-mode optical port.
Before connecting the optical fiber cable, make sure the type of the connector and
the optical fiber cable are consistent with the optical port type.
WARNING: When a connector is not inserted in the optical port or when its
dustproof cover is open, invisible radiation can escape from the optical port. Do
not stare into the optical port directly. Cover the optical port if there is no
connector plugged in.
SC fiber connector
The 8-port 1000BASE-X GBIC module requires an SC optical fiber connector.
To attach the SC fiber connector:
1 Plug one end of the SC fiber connector into the optical port in the module.
2 Connect the other end of the connector to the corresponding device.
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Installing Cabling
47
CAUTION: When connecting an SC fiber connector, the switch TX must be
connected to the RX of the device on the network, and the switch RX must be
connected to the TX of the device on the network.
MT-RJ fiber connector
The 24-port 100BASE-FX MMF FE module requires an MT-RJ optical fiber
connector.
To attach the MT-RJ fiber connector:
1 Plug the MT-RJ fiber connector in the optical port into the module.
2 Connect the other end of the fiber connector to the corresponding device.
Installing Cabling
This section describes how to install and bind cables for your Switch 7750.
Bench-Mounted Switch If you have installed your chassis on a bench, all interface cables run on the left
side of the chassis in the cabling channel, and the chassis power cords run by the
rear chassis panel.
Rack-Mounted Switch If you have installed your switch in a 19-inch standard rack, the cables are bound
on the cable binding rack at the left side of the chassis and arranged to run on the
cable rack or under a raised floor. Collect all the transit data signal cable
connectors and locate them on the floor of the chassis. Power cords run out of the
rear left of the chassis and on a cable rack or under a raised floor.
Cable Binding Keep the following precautions in mind as you bind cables:
■
Do not allow cables to twist or bend as you bind them.
■
The cable body cannot be bent at an angle that is more than twice its diameter.
The cable running out of a connector cannot be bent more than five times its
diameter.
■
Different types of cables (power cord, signal cable, and ground wire) should
not be bound together in a cabinet. Although different types of cable may
cross over each other, they must not be bound together where they cross. For
parallel cabling, the space between a power cord and a signal cable should be
no less than 30 mm (1.25 in).
■
■
The cable binding rack and cable channel inside and outside a cabinet should
be smooth.
The hole through which a cable runs through should be smooth or have a
rubber grommet.
■
■
Use plastic cabling ties to bind the cables.
Bind cables before bending them. Ensure that no tie binds the bent part of any
cables to prevent the core of the cable from breaking.
■
■
Do not tie power cables to the guides of any mobile components.
For the cable terminals fixed with screws, the screws or nuts should be
fastened securely.
■
Do not use tapping screws to fasten the cabling terminals.
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48
CHAPTER 2: INSTALLING THE SWITCH 7750
Table 48 Cable Binding Parameters
Cable Bundle Diameter
10 mm (0.5in)
Space Between Bundles
80-150 mm (3.5 – 6 in)
150-200 mm (6 – 8 in)
200-300 mm (8 – 12 in)
10-30 mm (.5 – 1.2 in)
30 mm (1.2 in)
Post-installation
Checklist
operates correctly.
WARNING: Confirm that you have turned off the power before checking your
installation. Improper connections can injure people or damage components of
the switch.
Table 49 Installation Checklist
Item
Normal
Abnormal (Remarks)
Antistatic wrist strap
Console cable
Ground wire
Power cord
Fabric
I/O module
Fan frame
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CONFIGURING THE SWITCH 7750
3
The following sections of this chapter describe how to configure and boot the
Switch 7750:
■
■
■
Configuring the
Switch 7750 and a
Local Terminal
terminal (a PC in this example) is connected to the switch console port using a
console cable.
Figure 36 Connecting the Switch 7750 to a PC
Switch
Console cable
1 Plug the DB-9 or DB-25 female plug of the console cable into the serial port of the
PC or the terminal where the switch will be configured.
2 Connect the RJ-45 connector of the console cable to the console port of the
switch.
Setting Terminal
Parameters
To set terminal parameters and open a HyperTerminal session:
1 Start the PC and select Start > Programs > Accessories > Communications >
HyperTerminal.
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50
CHAPTER 3: CONFIGURING THE SWITCH 7750
Figure 37 Connection Description Dialog Box
2 Enter the name of the new connection in the Name field and click OK. The dialog
Connect using dropdown menu.
Figure 38 Properties Dialog Box
can set serial port parameters. Set the following parameters:
■
■
■
■
■
Baud rate = 9600
Databit = 8
Parity check = none
Stopbit = 1
Flow control = none
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52
CHAPTER 3: CONFIGURING THE SWITCH 7750
Figure 41 Settings Tab
Booting the Switch
7750
Before powering on the Switch 7750, verify that:
■
■
■
■
■
Power cords have been properly connected.
The voltage of power supply can meet the requirements on the switch.
The console cable has been connected properly.
The PC or terminal for configuration has been started.
The terminal parameters have been set.
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Booting the Switch 7750
53
Powering up and Turn on the power for the Switch 7750 and run the BootROM program. The
Booting terminal displays the following information:
Starting......
RAM Line....OK
System is booting.....................
******************************************
*
*
* Switch 7750 BOOTROM, Version 300
*
*
*
******************************************
Copyright(C) 2001-2005 by 3Com Corporation, Inc.
Creation date: Mar 25 2003, 09:33:05
CPU type
: MPC8260
CPU Clock Speed : 200Mhz
BUS Clock Speed : 66Mhz
Memory Size
: 256MB
FAB64 self testing...............................
60X_SDRAM Data lines Selftest.............................OK!
60X_SDRAM Address lines Selftest..........................OK!
60X_SDRAM fast selftest...................................OK!
Please check LEDs.....................LEDs selftest finished!
Switch chip selftest......................................OK!
CPLD selftest.............................................OK!
The switch Mac address is .....................00E0.FC00.7505
Press Ctrl+B to enter Boot Menu... 5
To enter Boot Mode (see Chapter 6), press Ctrl+B during the 5 seconds that “Press
Ctrl+B to enter Boot Menu...5” is displayed. To perform decompression
immediately, press ESC while this message is displayed. If you do nothing, the
system enters the following auto-booting port within 5 seconds:
Auto-booting....................
Auto booting file is sw7750001.app
There are 2 files in this packet
FAB64 app file <<FAB64001.app>> is...OK
Decompress
Image...............................................................
....................................................................
....................................................................
....................................................................
..............OK!
Starting at 0x60000...
User interface Aux0 is available
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54
CHAPTER 3: CONFIGURING THE SWITCH 7750
The display of these messages indicates the completion of the switch
auto-booting. Press Enter and the terminal screen displays:
<3Com>
You can now begin the configuration for the Switch 7750.
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MAINTAINING SOFTWARE
4
This chapter covers the following topics:
■
■
■
Upgrading Software
The following sections describe how to upgrade software on your Switch 7750:
■
■
■
■
■
■
Always save the configuration file before upgrading applications.
Upgrading the Software To upgrade the software image of a Switch 7750, use one of the following
Image procedures:
■
■
■
■
Upgrading Software Use the following procedure to upgrade software with FTP:
with FTP
1 Log in to the system with super-user privileges.
2 From the SW7750 command line, transfer the file from the FTP server to the
system, using the ftpcommand.
3 Specify the file to boot the system from, using the bootcommand.
4 Reboot the system, using the rebootcommand.
The following example illustrates this procedure:
<SW7750>su
Password:
Now user privilege is 3 level, and just commands which level is
equal to or less than this level can be used.
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56
CHAPTER 4: MAINTAINING SOFTWARE
Privilege note: 0-VISIT, 1-MONITOR, 2-SYSTEM, 3-MANAGE
<SW7750>ftp 10.10.110.1
Trying ...
Press CTRL+K to abort
Connected.
220 3Com 3CDaemon FTP Server Version 2.0
User(none):anonymous
331 User name ok, need password
Password: xxxxxxx
230 User logged in
[ftp]bin
200 Type set to I.
[ftp]get sw7750003.app
200 PORT command successful.
150 File status OK ; about to open data connection
226 Closing data connection; File transfer successful.
FTP: 3794803 byte(s) received in 130.480 second(s)
29.08Kbyte(s)/sec.
[ftp]quit
221 Service closing control connection
<SW7750>boot boot-loader primary sw7750003.app
The specified file will be booted next time!
<SW7750>reboot
This will reboot Switch. Continue? [Y/N] y
For more detailed descriptions of the setup and procedures for upgrading
software, see the remaining sections in this chapter.
Upgrading Software To perform this procedure, you must have a network connection to the
Using The BOOT Menu management port on the Switch 7750 Fabric module.
After powering on the Switch 7750, the BootROM program runs automatically.
The terminal displays the following information:
Starting......
RAMLine.....OK
System is booting.....................
******************************************
*
*
*
*
* Switch 7750 BOOTROM, Version 516
*
******************************************
Copyright (c) : 2003-2005 3Com Corporation
Creation date : Jan 20 2005, 09:37:12
CPU type
: MPC8245
CPU Clock Speed : 400Mhz
BUS Clock Speed : 66Mhz
BOOT_FLASH type : M29W040B
Flash Size
Memory Size
: 32MB
: 256MB
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Upgrading Software
57
FAB96 self testing..........................................
SDRAM Data lines Selftest.................................OK!
SDRAM Address lines Selftest..............................OK!
SDRAM fast selftest.......................................OK!
Please check LEDs.....................LEDs selftest finished!
CPLD selftest.............................................OK!
FPGA selftest.............................................OK!
The switch Mac address is .....................0020.4C6A.CF04
Press Ctrl+B to enter Boot Menu...
1 Press Ctrl+B. The system displays the prompt for the BootROM password:
Password :
To access the BOOT Menu, press Ctrl+B during the five seconds that “Press Ctrl-B
to enter Boot Menu...” displays. After five seconds, the system begins program
decompression. If you want to access the BOOT Menu after this, you must reboot
the switch.
2 Enter the BootROM password. After entering the correct password (no password
is set for the switch by default), the system will access the BOOT Menu:
CAUTION: While using the switch, keep in mind the modified BOOTROM
password.
Boot Menu
1: Download application file to flash
2: Select application file to boot
3: Display all files in flash
4: Delete file from flash
5: Modify bootrom password
0: Reboot
Enter your choice(0-5):
Downloading an Application to Flash Memory
To download an application to flash memory:
1 Select option 1 on the Boot Menu. The following menu displays:
1. Set TFTP protocol parameter
2. Set FTP protocol parameter
3. Set XMODEM protocol parameter
0. Return to boot menu
Enter your choice(0-3): 1
2 Select option 1then enter the appropriate information in the fields that display:
Load File name
Switch IP address
Server IP address
:sw7750003.app
:10.10.110.1
:10.10.110.50
3 Type Y at the download prompt so the system downloads the file to flash:
Are you sure to download file to flash? Yes or No(Y/N) y
4 After the download is complete, select option 0to return to the boot menu.
5 From the boot menu, select option 2then select the newly downloaded file.
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58
CHAPTER 4: MAINTAINING SOFTWARE
Selecting the Application File for the Boot
If the Switch 7750 primary image fails because of a CRC error or a file format
error, you can configure the system to find the backup image you select to boot
from.
To select the image file that you want the system to boot from:
1 Select 0to return to the Boot Menu.
2 Select option 2from the Boot Menu. The following text displays:
File Number
File Size(bytes)
File Name
========================================================
1.
4
6256229
1012
snmpboots
2(-).
3.
SW7750-V300RE-8016.app
taskswitch.log
private-data.txt
s.t
4.
151
5.
228308
1975
6.
sw7750.cfg
7.
631736
462848
228376
199696
2427
Btm400.btm
8(*).
9.
SW7750-V300R-.app
S3com400.app
8241btm.app
vrpcfg.txt
10.
11.
12.
13.
203460
228308
lpcom400.app
snec400.app
The current application file is :SW7750-V300R-.app
The backup application file is :SW7750-V300RE-8016.app
Free Space : 7536640 bytes
3 Enter the file number of the primary image:
Please input the primary image file number :13
4 To confirm this choice, type Y at the prompt:
The primary file you selected is snec400.app, are you sure? Yes or
No(Y/N) Y
On reboot,snec400.app will become the default application file to
boot!
5 Enter the file number of the backup image:
Please input the backup image file number : 8
6 To confirm this choice, type Y at the prompt:
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Upgrading Software
59
The file you selected is SW7750-V300R-.app, are you sure? Yes or
No(Y/N) y
On reboot,SW7750-V300R-.app will become the default application file
to boot!
7 Type Y to run the primary image:
Do you want to run snec400.app now? Yes or No(Y/N)? Y
No Backup Image If you do not enter the number of a backup boot file, the
following text displays:
Please input the backup boot file number :
Input Error!
Failed to select backup image file!
Type Y to run the primary boot file:
Do you want to run snec400.app now? Yes or No(Y/N)? Y
Backup Image Fails If the backup image fails and another backup image
configuration does not exist, the Switch 7750 will try to find any valid image on
the flash. This image is not the primary or backup image:
All Images Fail If all images fail, the Switch 7750 will return to the boot menu:
primary image : snec400.app
backup image : SW7750-V300R-.app
There is one passed image in addition:
File Number
========================================================
1. 6256229 SW7750-V300RE-8016.app
File Size(bytes)
File Name
Press Ctrl+B to enter Boot Menu... 0
Auto-booting....................
Auto booting file is snec400.app
No LPU application file < vxworks.app > in flash
Please download LPU application file vxworks.app to flash
No correct main file to boot!
loading backup image file to boot!
Auto booting backup file is SW7750-V300R-.app
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60
CHAPTER 4: MAINTAINING SOFTWARE
Assert at file: 'vfs_flsh.c', Line: 4549
There are 3 files in this package
SRPU app file error! backup boot file is corrupted!
Select a file to boot from!
the num is 1
the num is 2
File SW7750-V300RE-8016.app is selected for autoBoot:
backup file is SW7750-V300RE-8016.app
There are 3 files in this package
SRPU app file <<FAB64R.app>> is...OK
Decompress
Image...............................................................
....................................................................
....................................................................
....................................................................
........................................OK!
Starting at 0x60000...
The primary image name is saved in flash memory, the secondary image name is
saved in the EPPROM. However, if you use the display boot command to display
the boot image it will only read from flash so only the primary image will be
displayed. The secondary boot image name cannot be displayed when there is an
image error.
Upgrading Software The Xmodem protocol transmits files through serial ports and supports both
Using Xmodem 128-byte and 1K-byte packets. Xmodem also supports two types of check; normal
checksum and CRC. When there is a packet error, retransmission is supported,
normally 10 times.
The Xmodem protocol completes transmission by receiving and sending programs.
The receiving program first sends the negotiating characters to negotiate the
check means. After passing the negotiation, the sending program begins to send
the packet.
The receiving program checks the packet according to the negotiated means after
receiving a complete packet. The acknowledgement characters are sent after
passing the check and then the sending program continues to send the next
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Upgrading Software
61
packet. If the check fails, negative characters are sent and the sending program
sends the packet again.
1 Enter 1in the BOOT Menu and press Enter. The system accesses the download
application file menu:
1. Set TFTP protocol parameter
2. Set FTP protocol parameter
3. Set XMODEM protocol parameter
0. Return to boot menu
Enter your choice (0-3):
2 Enter 3in the download program menu.
Enter your choice(0-3): 3
3 Press Enter. The system enters the download rate-setting menu:
Please select your download baudrate:
1. 9600
2. 19200
3. 38400
4. 57600
5. 115200
0. Exit
Enter your choice (0-5):
4 Select the appropriate download speed. For example, enter 5to select a download
speed of 115200bps.
5 Press Enter. The terminal displays the following information:
Download baudrate is 115200 bps. Please change the terminal’s
baudrate to 115200 bps, and select XMODEM protocol.
Press enter key when ready.
6 Change the baud rate set at the configuration terminal, so that the baud rate is
consistent with the selected download baud rate of the software.
7 Disconnect the terminal and reconnect it.
8 Press Enter to start downloading. The terminal displays the following information:
Now please start transfer file with XMODEM protocol.
If you want to exit, Press <Ctrl+X>.
Waiting ... CCCCC
9 Select Transfer\Send File from the terminal window.
application you want to download.
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62
CHAPTER 4: MAINTAINING SOFTWARE
Figure 42 Send File dialog box
11 Change the protocol name for the download to Xmodem.
Figure 43 Xmodem File Send Dialog Box
13 After the download is complete, the system interface is shown, as follows:
Loading ...CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC done!
14 Select 0to return to the Boot Menu.
15 From the boot menu, select option 2then select the newly downloaded file.
Upgrading Software TFTP (Trivial File Transfer Protocol) is a simple file transfer protocol that is used
Using TFTP without complex interaction between clients and servers.
The client initiates a TFTP transmission. To download files, the client sends a read
request packet to the TFTP server, receives the packet from the server, and sends
the acknowledgement to the server. To upload files, the client sends a write
request packet to the TFTP server, sends the data packet to the server, and receives
the acknowledgement from the server.
The Switch 7750 provides the functions of the TFTP client.
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Lost Passwords
63
A TFTP Server program is shipped on the CDROM with the Switch 7750.
Before you upgrade:
■
■
Verify that there is a connection between the TFTP server and the Switch 7750
(use the pingcommand.)
Verify that the TFTP server is set up according to the manufacturer's instructions
and that it is enabled and pointing to the correct directory.
To upgrade using TFTP:
1 Verify that you are logged in with super-user privileges.
2 From the Switch 7750 command line (in user view), TFTP the image file from the
TFTP server to the Switch 7750 using the following command:
tftp <TFTP Server IP Address> get <Source File/image>< Dest
File-Optional>
3 Set the boot parameters to specify the file to boot the system from, using the
following command:
boot boot-loader primary filename
4 Reboot the system.
The following example illustrates this procedure:
<SW7750>tftp 10.10.110.1 get sw7750003.app
Transfer file in binary mode.
Now begin to download file from remote tftp server, please wait...
/
TFTP: 5690749 bytes received in 376 second(s).
File downloaded successfully.
<SW7750>boot boot-loader primary sw7750003.app
The specified file will be booted next time!
<SW7750>reboot
This command will reboot the system. Continue? [Y/N] y
Upgrading Software in After you have upgraded the software on the primary Fabric in an 8-slot chassis,
the Secondary Fabric of you must copy the software to the secondary Fabric.
the 8-slot Chassis
1 Copy the code to the secondary Fabric.
<SW-7700-8-slot>copy slot0#flash:/77h03_01_51s56c10.app slot1#flash
2 Set the boot-loader to boot off from the new application image after the next
reboot.
<SW-7700-8-slot>boot boot-loader primary
slot1#flash:/77h03_01_51s56c10.app slot1#flash
Lost Passwords
If the BootROM password of the switch is lost, contact your local support center,
Using the BOOT Menu After you power on the Switch 7750, the BootROM program runs automatically.
The terminal displays the following information:
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64
CHAPTER 4: MAINTAINING SOFTWARE
Starting......
RAMLine.....OK
System is booting.....................
******************************************
*
*
*
*
* Switch 7750 BOOTROM, Version 516
*
******************************************
Copyright (c) : 2003-2005 3Com Corporation
Creation date : Jan 20 2005, 09:37:12
CPU type
: MPC8245
CPU Clock Speed : 400Mhz
BUS Clock Speed : 66Mhz
BOOT_FLASH type : M29W040B
Flash Size
Memory Size
: 32MB
: 256MB
FAB96 self testing..........................................
SDRAM Data lines Selftest.................................OK!
SDRAM Address lines Selftest..............................OK!
SDRAM fast selftest.......................................OK!
Please check LEDs.....................LEDs selftest finished!
CPLD selftest.............................................OK!
FPGA selftest.............................................OK!
The switch Mac address is .....................0020.4C6A.CF04
Press Ctrl+B to enter Boot Menu...
The contents displayed on the terminal can vary with different versions of Boot
ROM.
If you press Ctrl+B immediately, the system displays the Boot Menu. If you do not
press Ctrl+B, the system initiates the program decompression process. At this time
if you want to access the BOOT Menu, you must reboot the switch.
Press Ctrl+B. The system displays:
Initialize flash file system. Please wait!
Password :
Enter the BootROM password. After entering the correct password (no password
is set for the switch by default), the system will access the BOOT Menu:
Boot Menu
1: Download application file to flash
2: Select application file to boot
3: Display all files in flash
4: Delete file from flash
5: Modify bootrom password
0: Reboot
Enter your choice(0-5):
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Using the BOOT Menu
65
CAUTION: While using the switch, please keep in mind the modified BOOTROM
password.
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66
CHAPTER 4: MAINTAINING SOFTWARE
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TROUBLESHOOTING
5
This chapter covers the following topics:
■
■
■
■
The simplest way to diagnose a fault is to check the system status LEDs on the
Fabric modules. In addition, with the DeviceMgr network management system,
you can also locate the fault through management software.
Troubleshooting the
Configuration
After the switch is powered on, booting information is displayed on the
configuration terminal. If the configuration system has failed, there is no screen
display at the configuration terminal or the displayed characters are illegible.
No information is If there is no information displayed on the terminal after the Switch 7750 is
displayed on the powered on, check that:
terminal
■
■
■
The power system is working normally.
The Fabric is working normally.
The console cable has been connected to the console port in the Fabric.
If this procedure does not reveal the problem, verify that the console cable is
properly connected and that the configuration terminal is set correctly.
The display characters If the displayed characters are illegible, the parameters of configuration terminal
Troubleshooting
Power
If the Power OK LED is off, there may be something wrong with the system power
supply. Check that:
■
The power module has been installed in the correct position to ensure normal
communication with the backplane.
■
■
■
The switch power has been turned on.
The power cord is connected properly.
The source voltage is correct.
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68
CHAPTER 5: TROUBLESHOOTING
Table 50 Power LEDs on the Fabric
LED
Status Description
OK
On — The power is working normally.
Off — The power has failed or has not been installed.
FAIL
On — The power has failed.
Off — The power is working normally or has not been installed.
Troubleshooting the
Fan
If the fan OK LED is off, check that:
■
The fan has been installed in the correct position for normal communication
with the backplane.
■
■
■
Every heat dissipation fan is working normally.
There is nothing blocking the vent of the chassis.
The blanking plates are installed on the chassis where no module is inserted.
Table 51 Fan LEDs on the Fabric
LED
Status Description
OK
On — The fan is working normally.
Off — The fan has failed or has not been installed.
FAIL
On — The fan has failed.
Off — The fan is working or has not been installed
Troubleshooting the
Modules
The Fabric and I/O module LEDs show the status of the FABRIC and the I/O
■
■
■
If the ALM LED of the module remains green or green flashing, it indicates
there is something wrong with the module.
During the process of resetting the module, the ALM LED remains on. After
normal booting, it is off.
When resetting the module, if the ALM LED remains off, the module may not
be connected to the power source. Verify that the module has been properly
installed in the correct position.
Table 52 Module LEDs on the Fabric
LED
Status Description
RUN
Green/Off — The module has failed or has not been inserted.
Green flashing — The module is working normally.
ALM
Off — The module is working or has not been inserted.
Green or green flashing— The module has failed.
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MAINTAINING HARDWARE
6
This chapter covers the following topics:
■
■
■
■
The procedures in this chapter should be performed by trained service personnel
only.
Replacing a Power
Module
To replace a power module, you need:
■
An antistatic wrist strap
A screwdriver
■
WARNING: Insure that the switch is powered off before removing or installing a
power module.
Removing the AC Power To remove the power module, do the following:
Module
1 Power off the Switch 7750.
2 Remove the power cord from both the power module and the AC power socket.
3 Loosen the retaining screw that secures the power supply on the lower right front
of the power supply.
4 Remove the power supplies approximately 2 inches (5 cm) from the chassis to
disconnect the power supply AC connectors from the AC power module.
5 Loosen and remove the 4 screws at the corners of the power module.
6 Remove the power module from the chassis.
Installing the AC Power To install the new power module, do the following:
Module
1 Slide the replacement power module into the power module slot in the bottom
rear of the chassis.
2 Insert and tighten the 4 screws at the corners of the power module.
3 Reconnect the power supplies to the power module.
4 Tighten the retaining screw on the lower right front of the power supply.
5 Connect 2 power cords to the power module.
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70
CHAPTER 6: MAINTAINING HARDWARE
6 Connect the power cords to separate AC power sources on separate power grids
or to a UPS/backup power system.
WARNING: Do not power on the switch until you reconnect all the components.
Replacing a Power
Supply
To replace a power supply, you need:
■
An antistatic wrist strap
A screwdriver
■
WARNING: When installing or replacing the power supply when the power is on,
do not touch any naked wire, terminal, or any other part of the product labeled
Dangerous Voltage. Always wear the antistatic wrist strap when replacing the
supply.
Use the following steps to replace a power supply:
1 Loosen the captive screws in the supply that you want to replace.
2 Support the power supply you are removing with one hand and gently pull the
handle with the other hand until it slides out of the slot.
3 If you are not going to install another power supply in this slot, install a blanking
plate on the chassis for dust-proofing and heat dissipation.
4 Remove the new power supply from the package and check the input mode.
5 Support the power supply in one hand and hold the handle with another hand.
Align the supply with the guides in the chassis and slide the supply gently into the
slot.
CAUTION: As you are inserting the power supply, if the pin terminal springs up,
the pin cannot be seated into the hole and the system will sound an alarm. If the
power supply has not been inserted properly, you should slide it out and insert it
again to avoid breaking or cracking the power terminals.
6 Fasten the captive screws.
CAUTION: If the captive screws cannot be fastened, the power supply may not
have been properly seated. Remove and replace the supply.
Over time, the filter on the power supply accumulates dust, which interferes with
the heat dissipation of the chassis. It is important to periodically clean the filter as
described below:
1 Remove the gauze filter by gently pulling it from the front of the power supply.
2 Take the filter to a fresh water supply and clean it.
3 Leave the filter to dry. Do not use heat to dry the filter as this may cause it to
distort.
4 When the filter is completely dry, gently push it back into the front of the power
module.
CAUTION: Do not clean the filter while it is in position at the front of the power
supply. Attempts to do so could result in damage to the equipment or severe
electrical shock.
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Replacing I/O Modules
71
Replacing I/O Modules To replace an I/O module, you need:
■
An antistatic wrist strap
A Screwdriver
■
To remove a module:
1 Remove all the cables from the module to be removed.
2 Loosen the captive screws.
3 Hold the ejector levers on the module with both hands, and press them toward
both sides to separate the connectors of the module from the motherboard.
4 Gently slide the module along the guides and out of the slot.
5 Put the removed module into the package that contained the replacement
module.
Replace the blanking plate on the chassis if you do not install a new module in the
place where the old one was removed.
To install a replacement module:
1 With both hands, hold the ejector levers on the module that will be installed.
2 Align the module with the guides in the chassis and slide it into the slot gently
until you feel the positioning pin on the handle bar touch the hole in the chassis.
3 Press the ejector levers inward and seat the pin on the handle bar into the
positioning hole in the chassis.
4 Fasten the captive screws to fix the module.
Replacing the Fan
Assembly
You can hot-swap fan assemblies in the Switch 7750.
To replace a fan assembly, you need:
■
An antistatic wrist strap
A Screwdriver
■
WARNING: To avoid injury, do not touch any naked wire, terminal, or any part of
the product labeled Dangerous Voltage. Always wear the antistatic wrist strap
when replacing the fan module.
To replace a fan assembly:
1 Put on the antistatic wrist strap.
2 With both hands, pull out the ejector levers on the fan assembly to separate the
fan assembly connector from the backplane.
3 Pull the fan gently along the guides of the slot to remove it.
4 With both hands, pull out the ejector levers of the fan that will be installed. Align
it with the guides in the chassis and slide it gently into the slot until you feel the
positioning pin on the handle bar touch the hole in the chassis.
5 Press the ejector levers inward and seat the pin on the handle bar into the
positioning hole in the chassis.
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72
CHAPTER 6: MAINTAINING HARDWARE
WARNING: If the fan fails, replace it with a new one without delay before
operating the Switch 7750. Failure to do so will cause the switch to overheat.
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OBTAINING SUPPORT FOR YOUR
SWITCH
B
Register Your Product
to Gain Service
Benefits
To take advantage of warranty and other service benefits, you must first register
on accounts that you create or have authorization to access. First time users must
apply for a user name and password that provides access to a number of eSupport
features including Product Registration, Repair Services, and Service Request.
Purchase Value-Added
Services
To enhance response times or extend warranty benefits, contact 3Com or your
authorized 3Com reseller. Value-added services can include 24x7 telephone
technical support, software upgrades, onsite assistance or advance hardware
replacement. Experienced engineers are available to manage your installation with
minimal disruption to your network. Expert assessment and implementation
services are offered to fill resource gaps and ensure the success of your networking
projects. More information on 3Com Extended Warranty and Professional Services
is available at http://www.3com.com/
Contact your authorized 3Com reseller or 3Com for additional product and
support information.
Troubleshoot Online
You will find support tools posted on the 3Com web site at
■
3Com Knowledgebase helps you troubleshoot 3Com products. This
query-based interactive tool is located at http://knowledgebase.3com.com
and contains thousands of technical solutions written by 3Com support
engineers.
■
Connection Assistant helps you install, configure and troubleshoot 3Com
desktop and server NICs, wireless cards and Bluetooth devices. This diagnostic
software is located at:
ankyou.html
Access Software
Downloads
Software Updates are the bug fix / maintenance releases for the version of
software initially purchased with the product. In order to access these Software
Updates you must first register your product on the 3Com web site at
First time users will need to apply for a user name and password. A link to
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74
CHAPTER B: OBTAINING SUPPORT FOR YOUR SWITCH
Software Upgrades are the software releases that follow the software version
included with your original product. In order to access upgrades and related
documentation you must first purchase a service contract from 3Com or your
reseller.
Contact Us
3Com offers telephone, e-mail and internet access to technical support and repair
services. To access these services for your region, use the appropriate telephone
number, URL or e-mail address from the list below. You will find a current directory
of support telephone numbers posted on the 3Com web site at
Telephone Technical
Support and Repair
To obtain telephone support as part of your warranty and other service benefits,
you must first register your product at http://eSupport.3com.com/
When you contact 3Com for assistance, please have the following information
ready:
■
■
■
■
Product model name, part number, and serial number
A list of system hardware and software, including revision level
Diagnostic error messages
Details about recent configuration changes, if applicable
To send a product directly to 3Com for repair, you must first obtain a return
authorization number (RMA). Products sent to 3Com, without authorization
numbers clearly marked on the outside of the package, will be returned to the
sender unopened, at the sender’s expense. If your product is registered and under
warranty, you can obtain an RMA number online at
http://eSupport.3com.com/. First time users will need to apply for a user name
and password.
Telephone numbers are correct at the time of publication. Find a current directory
of support telephone numbers posted on the 3Com web site at
Country
Telephone Number
Country
Telephone Number
Asia, Pacific Rim Telephone Technical Support and Repair
Australia
Hong Kong
India
1 800 678 515
800 933 486
+61 2 9424 5179 or
000800 650 1111
001 803 61009
00531 616 439 or
03 5977 7991
Philippines
1235 61 266 2602 or
1800 1 888 9469
10800 61 00137 or
021 6350 1590 or
00800 0638 3266
800 6161 463
P.R. of China
Indonesia
Japan
Singapore
S. Korea
Taiwan
080 333 3308
00801 611 261
Malaysia
1800 801 777
New Zealand
Pakistan
0800 446 398
+61 2 9937 5083
Thailand
001 800 611 2000
You can also obtain support in this region using the following e-mail: [email protected]
Or request a repair authorization number (RMA) by fax using this number: + 65 543 6348
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Telephone Technical Support and Repair
75
Country
Telephone Number
Country
Telephone Number
Europe, Middle East, and Africa Telephone Technical Support and Repair
From anywhere in these
regions, call:
+44 (0)1442 435529
From the following countries, you may use the numbers shown:
Austria
Belgium
Denmark
Finland
France
Germany
Hungary
Ireland
Israel
01 7956 7124
070 700 770
7010 7289
01080 2783
0825 809 622
01805 404 747
06800 12813
01407 3387
1800 945 3794
199 161346
Luxembourg
Netherlands
Norway
342 0808128
0900 777 7737
815 33 047
00800 441 1357
707 200 123
0800 995 014
9 021 60455
07711 14453
08488 50112
0870 241 3901
Poland
Portugal
South Africa
Spain
Sweden
Switzerland
U.K.
Italy
You can also obtain support in this region using the following URL: http://emea.3com.com/support/email.html
Latin America Telephone Technical Support and Repair
Antigua
Argentina
Aruba
Bahamas
Barbados
Belize
Bermuda
Bonaire
Brazil
Cayman
Chile
Colombia
Costa Rica
Curacao
Ecuador
Dominican Republic
1 800 988 2112
0 810 444 3COM
1 800 998 2112
1 800 998 2112
1 800 998 2112
52 5 201 0010
1 800 998 2112
1 800 998 2112
0800 13 3COM
Guatemala
Haiti
Honduras
Jamaica
Martinique
Mexico
Nicaragua
Panama
Paraguay
Peru
Puerto Rico
Salvador
Trinidad and Tobago
Uruguay
Venezuela
Virgin Islands
AT&T +800 998 2112
57 1 657 0888
AT&T +800 998 2112
1 800 998 2112
571 657 0888
01 800 849CARE
AT&T +800 998 2112
AT&T +800 998 2112
54 11 4894 1888
AT&T +800 998 2112
1 800 998 2112
AT&T +800 998 2112
1 800 998 2112
AT&T +800 998 2112
AT&T +800 998 2112
57 1 657 0888
1 800 998 2112
AT&T +800 998 2112
AT&T +800 998 2112
AT&T +800 998 2112
1 800 998 2112
AT&T +800 998 2112
AT&T +800 998 2112
You can also obtain support in this region using the following:
Spanish speakers, enter the URL:
Portuguese speakers, enter the URL:
English speakers in Latin America should send e-mail to:
US and Canada Telephone Technical Support and Repair
1 800 876 3266
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76
CHAPTER B: OBTAINING SUPPORT FOR YOUR SWITCH
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SWITCH 7750 CABLES
A
This appendix covers the following types of cables and connectors:
■
■
■
■
Console Cable
Figure 44 illustrates the console cable and connectors.
Figure 44 The Console cable
Enlargedd A side
DB25 Female
8P8C Plug
Enlarged B side
Enlarged C side
DB9 Female
Table 53 Console Cable Pin-outs
RJ-45
Signal
RTS
Direction
<----
<----
<----
--->
DB-25
DB-9
1
2
3
4
5
6
7
8
4
7
4
3
1
5
2
6
8
DTR
TXD
CD
20
2
8
GND
RXD
DSR
CTS
----
7
--->
3
--->
6
--->
5
AUX Cable
Figure 45 illustrates the AUX cable.
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78
APPENDIX A: SWITCH 7750 CABLES
Figure 45 The AUX Cable
DB25 Male
8P8C Plug
Enlargedd A side
Label
Enlarged B side
Enlarged C side
DB9Male
Table 54 AUX Cable Pin-outs
RJ-45
Signal
RTS
Direction
--->
DB-25
DB-9
1
2
3
4
5
6
7
8
4
7
4
3
1
5
2
6
8
DTR
TXD
CD
--->
20
2
--->
<---
8
GND
RXD
DSR
CTS
---
7
<---
3
<---
6
<---
5
Electrical Port
Connector
Figure 46 illustrates the RJ-45 connector.
Figure 46 The RJ-45 Connector
PIN #8
PIN #1
Table 55 RJ-45 MDI Port Pin-outs
Pinout 10BASE-T/100BASE-TX
1000BASE-T
Signal
Tx+
Function
Send data
Send data
Signal
BIDA+
BIDA-
Function
1
2
Send data to direction A
Tx-
Receive data from direction A
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Optical Fiber Cable Connectors
79
Table 55 RJ-45 MDI Port Pin-outs (continued)
Pinout 10BASE-T/100BASE-TX 1000BASE-T
3
4
5
6
7
8
Rx+
Receive data
BIDB+
BIDC+
BIDC-
BIDB-
BIDD+
BIDD-
Send data to direction B
Reserved
Reserved
Rx-
-
Receive data from direction C
Send data to direction C
-
Receive data
Receive data from direction B
Send data to direction D
Reserved
Reserved
-
-
Receive data from direction D
Tx = Send data Rx = Receive data BI = I-directional data.
Table 56 RJ-45 MDI-X Port Pinouts
Pinout 10BASE-T/100 BASE-TX
1000BASE-T
Signal
Rx+
Function
Signal
BIDB+
BIDB-
Function
1
2
3
4
5
6
7
8
Receive data
Send data to direction B
Rx-
Receive data
Receive data from direction B
Send data to direction A
Tx+
Send data
BIDA+
BIDD+
BIDD-
BIDA-
BIDC+
BIDC-
Reserved
Reserved
Tx-
-
Receive data from direction D
Send data to direction D
-
Send data
Receive data from direction A
Send data to direction C
Reserved
Reserved
-
-
Receive data from direction C
Optical Fiber Cable
Connectors
Figure 47 SC Optical Fiber Connector
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