3Com 3C16896, 3C16895, 3C16894, 3C16897 User Manual

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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

http://www.3com.com/

Part No. 10016428-AB Published December 2007

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3Com Corporation 350 Campus Drive Marlborough, MA 01752-3064

Copyright © 2005, 2007 3Com Corporation. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without written permission from 3Com Corporation.

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If there is any software on removable media described in this documentation, it is furnished under a license agreement included with the product as a separate document, in the hard copy documentation, or on the removable media in a directory file named LICENSE.TXT or !LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you.

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ABOUT THIS GUIDE

Conventions 5 Related Documentation 5

SWITCH 7750 COMPONENTS

Switch Chassis 7 Switch Backplane 7 Fabric Module 8 Fabric 32 Submodules 12 I/O Modules 14 Power Module 33 Power Distribution 33 External PoE Power System 33 Fan Assembly 34 Switch 7750 Specifications 35

INSTALLING THE SWITCH 7750

Preparing to Install 37 General Site Requirements 38 Installation Checklist 39 Installing the Chassis 40 Installing the Cabling Rack 40 Installing a Module 41 Installing a Submodule 41 Connecting the Ground Wire 42 Connecting and Configuring Power 42 Installing the Fan Assembly 45 Installing Cables 45 Installing Cabling 47 Post-installation Checklist 48

CONFIGURING THE SWITCH 7750

Configuring the Switch 7750 and a Local Terminal 49 Setting Terminal Parameters 49 Booting the Switch 7750 52

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4 CONTENTS

MAINTAINING SOFTWARE

Upgrading Software 55 Lost Passwords 63 Using the BOOT Menu 63

TROUBLESHOOTING

Troubleshooting the Configuration 67 Troubleshooting Power 67 Troubleshooting the Fan 68 Troubleshooting the Modules 68

MAINTAINING HARDWARE

Replacing a Power Module 69 Replacing a Power Supply 70 Replacing I/O Modules 71 Replacing the Fan Assembly 71

OBTAINING SUPPORT FOR YOUR SWITCH

Register Your Product to Gain Service Benefits 73 Purchase Value-Added Services 73 Troubleshoot Online 73 Access Software Downloads 73 Contact Us 74 Telephone Technical Support and Repair 74

SWITCH 7750 CABLES

Console Cable 77 AUX Cable 77 Electrical Port Connector 78 Optical Fiber Cable Connectors 79

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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

http://www.3com.com.

Conventions Ta bl e 1 lists icon conventions that are used throughout this guide.

SWITCH 7750 COMPONENTS

The chapter describes the following Switch 7750 components:

■ Switch Chassis

■ Switch Backplane

■ Fabric Module

■ Fabric 32 Submodules

■ I/O Modules

■ Power Module

■ Power Distribution

■ External PoE Power System

■ Fan Assembly

■ Switch 7750 Specifications

Switch Chassis The Switch 7750 is available with a 4-slot, 7-slot, or 8-slot chassis. Table 2 lists the

hardware features of each model.

Ta bl e 2 Hardware Features of the Switch 7750 Models

8-Slot Chassis 4-Slot Chassis 3C16894

Fabric slots 1 1 2

I/O module slots 3 6 6

Fan slot 1 1 2

AC/DC Power module slots

2 3 3

7-Slot Chassis 3C16895

AC 3C16896

DC 3C16897

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

45 6

3C16857

1234

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 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

1 Reset button

2 Console port

3 Ethernet port

4 Ethernet port LEDs

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5 Fan LEDs

3C16872

1234567

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 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

Fabric Module 9

Ta bl e 3 lists Fabric specifications.

Ta bl e 3 Fabric Specifications

PoE Fabric 96

Item

(3C16886)

Bandwidth 96 Gbps 64 Gbps 32 Gbps

CPU MPC8245 MPC8260 200 Mhz

BootROM 512 KB 1 MB

SDRAM 256 M 256 MB

Flash 32 MB 16 MB

Submodule slot 1

Dimensions (L x W) 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

80 W 80 W 70 W (with

consumption

Fabric 64 (3C16857 or 3C16857R)

Fabric 32 (3C16872)

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 page 12.

Fixed Ports The Switch 7750 Fabric modules provide the following fixed ports:

■ Compact Flash (CF) Port

■ 1000BASE-X-SFP (PoE Fabric 96 only)

■ Console Port

■ Ethernet Port

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 PoE Fabric 96 provides four 1000 Mbps full-duplex SFP ports. Table 4 describes the SFP cables for these ports.

Ta bl e 4 Cables for 1000BASE-T-SFP Modules

Maximum

SFP Module

Wavelength

Connector Matching Cable

1000BASE-SX-SFP 850 nm LC 50/125 µm

Central

transmission distance

550 m (1804 ft.) multimode optical fiber cable

62/125 µm

275 m (902 ft.) multimode optical fiber cable

1000BASE-LX-SFP 1310 nm 9/125 µm single

1000BASE-LH-SFP 30 km (19 mi.)

mode optical fiber cable

10 km (6 mi.)

1000BASE-ZX-LR-SFP 1550 nm 40 km (25 mi.)

1000BASE-ZX-VR-SFP 70 km (43 mi.)

1000BASE-T-FD-SFP RJ-45 100 m (328 ft.)

Ta bl e 8 describes the LEDs of the SFP ports.

Ta bl e 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.

Ta bl e 6 lists console port specifications.

Ta bl e 6 Console Port Specifications

Specification Description

Port connector RJ-45

Port standard Asynchronous EIA/TIA-232

Baud rate 9600 bps (by default)

Transmission distance 15 m (45 ft)

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.

Ta bl e 7 lists Ethernet port specifications.

Ta bl e 7 Ethernet Port Specifications

Specification Description

Port connector RJ-45

Number of port(s) 1

Port speed 10 Mbps, half/full duplex

Cable and maximum transmission distance

Port function Switch software upgrade and network management

100 Mbps, half/full duplex MDI/MDIX auto sensing

Category-5 twisted pair for transmission within 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.

Ta bl e 8 describes the LEDs of the Ethernet port.

Ta bl e 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.

Module LEDs The module LEDs show the status of the I/O modules, as described in Table 9.

Ta bl e 9 I/O Module LEDs

LED Status description

RUN Green or off — The module failed or has not been inserted.

ALM Off — The module is working normally or has not been

Power LEDs PWR1, PWR2, and PWR3 LEDs show the status of the power modules, as

described in

Ta bl e 10 Power LEDs

Ta bl e 10.

Green flashing — Data is being transmitted or received.

Green flashing — The module is working normally.

inserted. Green or green flashing — The module failed or is not working normally.

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.

Fan LED Fan LEDs show the status of the fan frame, as described in Table 11.

Ta bl e 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

■ 4-Port 1000BASE-X-GBIC Submodule (3C16874)

■ 4-Port 10/100/1000BASE-T Submodule (3C16873)

The 4-port 1000BASE-X-GBIC submodule provides four GE full-duplex Ethernet GBIC ports.

Figure 4 illustrates the 4-port 1000BASE-X-GBIC submodule.

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Fabric 32 Submodules 13

3C16873

Figure 4 4-Port 1000BASE-X-GBIC Submodule

3C16874

Ethernet GBIC port

2 Ethernet GBIC port LED

Ta bl e 12 describes the 4-port 1000BASE-X-GBIC submodule LEDs.

Ta bl e 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.

Ta bl e 13 lists the specifications for each of the 4-port 1000BASE-X-GBIC submodule.

4-Port

10/100/1000BASE-T

Submodule

Ta bl e 13 4-Port 1000BASE-X-GBIC Submodule Specifications

Max. Optional GBIC Module

1000BASE-SX-MM (3CGBIC91)

1000BASE-LX-SM-IR (3CGBIC92)

1000BASE-LX-SM (3CGBIC97)

Central Wavelength

850 nm SC 50/125 µm

1310 nm SC 9/125 µm

1550 nm SC 9/125 µm

Connector Type

Interface Fiber Specifications

multi-mode fiber

62.5/125 µm Multi-mode fiber

Single-mode fiber

Transmission

Distance

500 m (1640 ft)

220 m (722 ft)

10 km (6 mi)

40 km (25 mi)

70 km (43.5 mi)

The 4-Port 10/100/1000BASE-T submodule provides four 10/100/1000 Mbps auto-negotiation service ports.

Figure 5 illustrates the 4-port 10/100/1000BASE-T submodule.

Figure 5 4-Port 10/100/1000BASE-T Submodule

3C16873

1 Ethernet port

2 Ethernet port LEDs

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14 CHAPTER 1: SWITCH 7750 COMPONENTS

Ta bl e 14 describes the 4-port 10/100/1000BASE-T submodule LEDs.

Ta bl e 14 4-Port 10/100/1000BASE-T Submodule LEDs

LED Description

LINK Off — The link is not operating.

ACT Off — No data is being transmitted or received.

Ta bl e 15 lists specifications of the 4-port 10/100/1000BASE-T submodule.

Ta bl e 15 4-Port 10/100/1000BASE-T Submodule Specifications

Specification Description

Connector type RJ-45

Number of ports 4

Port speed 1000 Mbps full duplex

Cable and maximum transmission distance

On — The link is operating normally.

Green flashing — Data is being transmitted or received.

100 Mbps half/full duplex 10 Mbps half/full duplex MDI/MDI-X auto-sensing

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)

■ 48-port 100BASE-X SFP Module

■ 20-Port 10/100/1000BASE-T Module (3C16863A)

■ 20-Port 1000BASE-X-SFP Module (3C16862A)

■ 12-port 10/100/1000BASE-T and 4-port 1000BASE-X SFP Module (3C168916)

■ 12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T Module (3C186917)

■ 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

PoE Module

The 48-port 10/100BASE-T FE PoE module provides 48 10/100 Mbps auto-sensing 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

3C16891

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

1 Ethernet port

2 Ethernet port LED

Ta bl e 22 describes the 48-port 10/100BASE-T FE PoE Module LEDs.

Ta bl e 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.

Ta bl e 23 describes the specifications for the 48-port 10/100BASE-T FE PoE module.

Ta bl e 17 Specifications for the 48-port 10/100BASE-T FE PoE Module

Specification Description

CPU 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

Number of ports 48

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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

Cables and maximum transmission distance

Maximum power each port provides

Compliance IEEE802.3

100 m (328 ft.)

15.4 W

IEEE802.3u IEEE802.3x IEEE802.3ad IEEE802.1p IEEE802.1D IEEE802.1Q IEEE802.1X IEEE802.1s IEEE802.1w IEEE802.3af

48-port

10/100/1000BASE-T PoE

Module

The 48-port 10/100/1000BASE-T PoE module provides 48 10/100/1000 Mbps auto-sensing Ethernet ports that provide a remote power supply to powered devices.

Figure 12illustrates the 48-port 10/100/1000BASE-T PoE module.

Figure 8 48-port 10/100/1000BASE-T PoE Module

3C16890

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 Ethernet port

2 Ethernet port LED

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I/O Modules 17

Ta bl e 22 describes the 48-port 10/100/1000BASE-T PoE module LEDs.

Ta bl e 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.

Ta bl e 23 describes the specifications of the 48-port 10/100/1000BASE-T PoE module.

Ta bl e 19 Specifications for the 48-port 10/100/1000BASE-T PoE Module

Specification Description

CPU 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

Number of ports 48

Port transmission speed 10/100/1000 Mbps half-/full-duplex

Cables and maximum transmission distance

Compliance IEEE802.3ab

MDI/MDIX auto-sensing

Category 5 twisted pair with a maximum distance of 100 m (328 ft.)

IEEE802.3 IEEE802.3i IEEE802.3x IEEE802.1p IEEE802.1D IEEE802.1Q IEEE802.1X IEEE802.1s IEEE802.1w

48-port 10/100BASE-TX

FE Module

The 48-port 10/100BASE-TX FE module provides 48 10/100 Mbps auto-sensing 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 Ethernet port

2 Ethernet port LED

Each 100 Mbps Ethernet port has a green LED, indicating LINK/ACTIVE status.

Ta bl e 20 describes the 48-port 10/100BASE-TX FE module LED.

Ta bl e 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.

Ta bl e 21 describes the specifications of the 48-port 10/100BASE-TX FE module.

Ta bl e 21 Specifications for the 48-Port 10/100BASE-TX FE Module

Specification Description

CPU 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

Connector RJ-45

Number of ports 48

Port transmission speed

Cables and maximum transmission distance

Compliance IEEE802.3

75 W

10/100 Mbps half/full duplex MDI/MDIX auto-sensing

Cables are 2 100-ohm Category-5 twisted pairs up to 100 m (300 ft).

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.

Page 19

I/O Modules 19

48-port

10/100/1000BASE-T

Module

The 48-port 10/100/1000BASE-T module provides 48 10/100/1000 Mbps auto-sensing Ethernet electrical ports.

Figure 12 illustrates the 48-port 10/100/1000BASE-T module.

Figure 12 48-port 10/100/1000BASE-T Module

3C16888

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 Ethernet port

2 Ethernet port LED

Ta bl e 22 describes the 48-port 10/100/1000BASE-T module LEDs.

Ta bl e 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.

Ta bl e 23 describes the specifications of the 48-port 10/100/1000BASE-T module.

Ta bl e 23 Specifications for the 48-port 10/100/1000BASE-T Module

Specification Description

CPU 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

Number of ports 48

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 Description

Compliance 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

Module

The 48-port 100BASE-X SFP module provides 48 100 Mbps full-duplex Ethernet optical ports.

Figure 14 illustrates the 48-port 100BASE-X SFP module.

Figure 14 48-port 48-port 100BASE-X SFP Module

3C16888

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 Ethernet port

2 Ethernet port LED

Ta bl e 24 describes the 48-port 100BASE-X SFP module LEDs.

Ta bl e 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.

Ta bl e 25 describes the specifications of the 48-port 100BASE-X SFP module.

Ta bl e 25 Specifications for the 48-port 100BASE-X SFP Module

Specification Description

CPU MPC8241

BootROM 512 KB

SDRAM 128 M

Page 21

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

Number of ports 48

SFP module 100BASE-FX-MM-SFP

Port transmission speed 100 Mbps full-duplex

Compliance 1EEE 802.3

100BASE-FX-SM-SFP 100BASE-FX-SM-LR-SFP 100BASE-FX-SM-VR-SFP

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

24-port 100BASE-FX

MMF FE Module

Ta bl e 26 lists the cables for the 48-port 100BASE-X (SFP) ports

Ta bl e 26 Cables for the 48-port 100BASE-X SFP Module

Central wave-

SFP module

100BASE-FX-MM-SFP 1310nm LC multimode optical fiber

100BASE-FX-SM-SFP 1310nm 15 km (9.3 mi)

100BASE-FX-SM-LR-SFP1310nm 9/125 µm single mode

100BASE-FX-SM-VR-SFP1550nm 70km (43 mi)

length Connector Matching cable

cable

optical fiber cable

Maximum transmission distance

2 km (1.2 mi)

40 km (24.9 mi)

The 24-port 100BASE-FX MMF FE module provides 24 100 Mbps multi-mode 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 Ethernet port

2 Ethernet port LED

Ta bl e 27 describes the status of the 24-port 100BASE-FX MMF FE module LEDs.

Ta bl e 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.

Ta bl e 28 describes the specifications of the 24-port 100BASE-FX MMF FE module.

Ta bl e 28 Specifications for the 24-Port 100BASE-FX MMF FE Module

Specification Description

CPU 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

Connector type MT-RJ

Number of ports 24

Port transmission speed 100 Mbps, full-duplex

55 W

Page 23

I/O Modules 23

3C16863

Table 28 Specifications for the 24-Port 100BASE-FX MMF FE Module (continued)

Specification Description

Cables and maximum transmission distance

Compliance IEEE 802.3

62.5/125 µm multi-mode optical fiber up to 2 km (1.3 mi)

IEEE 802.3i

IEEE 802.3u IEEE 802.3x

20-Port

10/100/1000BASE-T

Module

The 20-Port 10/100/1000BASE-T module provides 20 10/100/1000BASE-T auto-sensing Ethernet ports.

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 Ethernet port

2 Ethernet port LED

Ta bl e 29 describes the 20-port 10/100/1000BASE-T module LEDs.

Ta bl e 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

Page 24

24 CHAPTER 1: SWITCH 7750 COMPONENTS

3C168623C16862

Ta bl e 30 lists specifications of the 20-port 10/100/1000BASE-T module.

Ta bl e 30 Specifications for the 20-Port 10/100/1000BASE-T Module

Specification Description

CPU MPC8241LZU200

BootROM 512 KB

SDRAM 64 MB

Dimensions (L x W) 366.7 x 340 mm (14.5 x 13.4 in)

Power consumption 45 W

Connector RJ-45

Number of ports 20

Transmission rate 10 Mbps half/full duplex

Cable and maximum transmission distance

Compliance IEEE 802.3ab

100 Mbps half/full duplex 1000 Mbps full duplex

Category-5 twisted pair 100 m (300 ft)

IEEE 802.3 IEEE 802.3u IEEE 802.3x IEEE 802.1D IEEE 802.1Q

20-Port 1000BASE-X-SFP

Module

The 20-port 1000BASE-X-SFP module provides 20 1000 BASE-X full duplex ports 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

Page 25

I/O Modules 25

1 Ethernet port

2 Ethernet port LED

Ta bl e 31 describes the 20-port 1000BASE-X-SFP module LEDs.

Ta bl e 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

Ta bl e 32 lists specifications of the 20-port 1000BASE-X-SFP module.

Ta bl e 32 Specifications for the 20-Port 1000BASE-X-SFP Module

Specification Description

CPU MPC8241LZU200

BootROM 512 KB

SDRAM 64 MB

Dimensions (L x W) 366.7 x 340 mm (14.5 x 13.4 in)

Power consumption 35 W

Connector SFP socket

Number of ports 20

Transmission rate 1000 Mbps full duplex

Cable and maximum transmission distance

Compliance IEEE 802.3z

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)

IEEE 802.1p IEEE 802.1Q IEEE 802.1D IEEE 802.3x IEEE 802.3ad

12-port

10/100/1000BASE-T

and

4-port 1000BASE-X SFP

Module

The 12-port 10/100/1000BASE-T and 4-port 1000BASE-X SFP module provides 12 10/100/1000 BASE-T ports and 4 1000BASE-X ports.

Figure 22 illustrates the 12-port 10/100/1000BASE-T and 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 Ethernet port

2 Ethernet port LED

3 SFP port

4 SFP LED

Ta bl e 31 describes the 12-port 10/100/1000BASE-T and 4-port 1000BASE-X SFP module LEDs.

Ta bl e 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.

Ta bl e 34 lists specifications of the 12-port 10/100/1000BASE-T and 4-port 1000BASE-X SFP module.

Ta bl e 34 Specifications for the 12-port 10/100/1000BASE-T and 4-port 1000BASE-X

SFP Module

Specification Description

CPU MPC8245

BootROM 512 KB

SDRAM 256 MB

Dimensions (L x W) 366.7 x 340 mm (14.5 x 13.4 in)

Power consumption 45 W

Connector SFP socket

Number of ports 12 10/100/1000BASE-T Ethernet ports

Transmission rate 1000 Mbps full duplex (optical port)

Ethernet cable and maximum transmission distance

Compliance IEEE 802.3

4 1000BASE-X (SFP) Ethernet ports

10 Mbps half/full duplex (electrical port) 100 Mbps half/full duplex (electrical port) 1000 Mbps full duplex (electrical port)

100 m (328 ft) over category-5 twisted pair cable

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

Page 27

I/O Modules 27

Ta bl e 35 lists the cables for the 1000BASE-X (SFP) ports.

Ta bl e 35 SFP Cables for the 12-port 10/100/1000BASE-T and 4-port 1000BASE-X

SFP Module

Maximum

Central

SFP module

SFP-GE-SX-MM850-A 850nm LC 50/125 µm multimode

SFP-GE-LX-SM1310-A 1310nm LC 9/125 µm single mode

SFP-GE-LH40-SM1310 40 km (about 25

SFP-GE-LH40-SM1550 1550nm LC 9/125 µm single mode

SFP-GE-LH70-SM1550 70 km (43 mi)

SFP-GE-LH100-SM155 0

SFP-GE-LH70-SM1470

-CW

SFP-GE-LH70-SM1490

-CW

SFP-GE-LH70-SM1510

-CW

SFP-GE-LH70-SM1530

-CW

SFP-GE-LH70-SM1550

-CW

SFP-GE-LH70-SM1570

-CW

SFP-GE-LH70-SM1590

-CW

SFP-GE-LH70-SM1610

-CW

SFP-GE-T - RJ45 - 100m (328 ft)

wavelength

1470nm LC 9/125 µm single mode

1490nm LC 9/125 µm single mode

1510nm LC 9/125 µm single mode

1530nm LC 9/125 µm single mode

1550nm LC 9/125 µm single mode

1570nm LC 9/125 µm single mode

1590nm LC 9/125 µm single mode

1610nm LC 9/125 µm single mode

Connector Matching cable

optical fiber cable

62.5/125 µm multimode optical fiber cable

optical fiber cable

transmission distance

550 m (1804 ft)

275 m (902 ft)

10 km (6 mi)

mi)

40 km (about 25 mi)

100km (62 mi)

70km (43 mi)

12-port 1000BASE-X SFP

and

4-port

10/100/1000BASE-T

Module

The 12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T module provides 12 1000BASE-X SFP ports and 4 10/100/1000BASE-X SFP ports.

Figure 24 illustrates the 12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T 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 SFP port

2 SFP port LED

3 Ethernet port

4 Ethernet port LED

Ta bl e 36 describes the 12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T module LEDs.

Ta bl e 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.

Ta bl e 37 lists specifications of the 12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T module.

Ta bl e 37 Specifications for the 12-port 1000BASE-X SFP and 4-port

10/100/1000BASE-T Module

Specification Description

CPU MPC8241

BootROM 512 KB

SDRAM 64 MB

Dimensions (L x W) 366.7 x 340 mm (14.5 x 13.4 in)

Power consumption 35 W

Connector RJ-45, LC

Page 29

I/O Modules 29

Table 37 Specifications for the 12-port 1000BASE-X SFP and 4-port

10/100/1000BASE-T Module

Specification Description

Number of ports 16

Transmission rate 1000 Mbps full duplex (optical/electrical)

Cable and maximum transmission distance

Compliance IEEE 802.3

(continued)

10/100 Mbps half-/full-duplex (electrical)

Category-5 twisted pair with maximum transmission distance of 100 m (328 ft)

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

Ta bl e 38 lists the cables for the 1000BASE-X SFP ports.

Ta bl e 38 SFP Cables for the 12-port 1000BASE-X SFP and 4-port

10/100/1000BASE-T Module

Central

SFP module

SFP-GE-SX-MM850-A 850nm LC 50/125 µm multimode

SFP-GE-LX-SM1310-A 1310nm LC 9/125 µm single mode

SFP-GE-LH40-SM1310 40 km (about 25

SFP-GE-LH40-SM1550 1550nm LC 9/125 µm single mode

SFP-GE-LH70-SM1550 70 km (43 mi)

SFP-GE-LH100-SM155 0

SFP-GE-LH70-SM1470

-CW

SFP-GE-LH70-SM1490

-CW

SFP-GE-LH70-SM1510

-CW

SFP-GE-LH70-SM1530

-CW

SFP-GE-LH70-SM1550

-CW

SFP-GE-LH70-SM1570

-CW

wavelength

1470nm LC 9/125 µm single mode

1490nm LC 9/125 µm single mode

1510nm LC 9/125 µm single mode

1530nm LC 9/125 µm single mode

1550nm LC 9/125 µm single mode

1570nm LC 9/125 µm single mode

Connector Matching cable

optical fiber cable

62.5/125 µm multimode optical fiber cable

optical fiber cable

Maximum transmission distance

550 m (1804 ft)

275 m (902 ft)

10 km (6 mi)

mi)

40 km (about 25 mi)

100km (62 mi)

70km (43 mi)

Page 30

30 CHAPTER 1: SWITCH 7750 COMPONENTS

3C16858

Table 38 SFP Cables for the 12-port 1000BASE-X SFP and 4-port

10/100/1000BASE-T Module

SFP module

SFP-GE-LH70-SM1590

-CW

SFP-GE-LH70-SM1610

-CW

SFP-GE-T - RJ45 - 100m (328 ft)

Central wavelength

1590nm LC 9/125 µm single mode

1610nm LC 9/125 µm single mode

Connector Matching cable

optical fiber cable

Maximum transmission distance

70km (43 mi)

8-port 1000BASE-X GBIC

Module

The 8-port 1000BASE-X GBIC module provides 8 external GBIC module ports. A 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

Every GBIC port has a LED, as shown in Figure 27.

Figure 27 Front Panel of the 8-Port 1000BASE-X GBIC Module

1 GBIC port

2 GBIC port LED

Page 31

I/O Modules 31

Ta bl e 39 describes the 8-Port 1000BASE-X GBIC module LEDs.

Ta bl e 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

The cables for each of the supported 8GBIC modules are described inTable 40.

Ta bl e 40 GBIC Module Port Cables

GBIC Module Type Central Wave Length

3CGBIC91 850 nm

3CGBIC92 1550 nm

3CGBIC97 1550 nm

Ta bl e 41 describes the specifications of the 8-port 1000BASE-X GBIC module.

Ta bl e 41 Specifications for the 8-Port 1000BASE-X GBIC Module

8-port

10/100/1000BASE-T GE

Module

Specification Description

CPU 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

Number of ports 8

Optional GBIC module types

Port transmission speed 1000 Mbps, full duplex

Compliance IEEE 802.3z

50 W

3CGBIC 91 3CGBIC 92 3CGBIC 97

IEEE 802.3x

The 8-port 10/100/1000BASE-T GE module provides 8 external 10/100/1000 Mbps auto-sensing Ethernet electrical ports.

Figure 28 illustrates the 8-port 10/100/1000BASE-T GE module.

Page 32

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.

Figure 29 Front Panel of the 8-Port 10/100/1000BASE-T GE Module

1 Ethernet port

2 Ethernet port LEDs

Ta bl e 42 describes the LEDs on the 8-port 10/100/1000BASE-T GE module.

Ta bl e 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 Ta bl e 43.

Ta bl e 43 Specifications for the 8-Port 10/100/1000BASE-T GE Module

Specification Description

CPU 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 RJ-45

Number of ports 8

Page 33

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

Compliance IEEE 802.3ab

4 100-ohm Category-5 non-shielded twisted pairs up to 100 m (300 ft).

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.

The 8-slot chassis offers both AC and DC power modules. Table 44 describes the specifications of each type of power module.

Ta bl e 44 Specifications for AC and DC Power Modules

Specification AC Power Module DC Power Module

Input 100 V to 240 V, 47 to 63 Hz -48 V to -60 V

Maximum output 460 W 460 W

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.

Page 34

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.

Ta bl e 45 describes the capabilities of the Switch 7750 PoE power module.

Ta bl e 45 PoE Power Modules

Power supplied Power modules

needed for

Input voltage

100 to 140 V 1200 W 2400 W 3

200 to 240 V 2400 W 2

1 Power module 2 Power module

redundancy

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.

Page 35

Figure 31 Fan Assembly

Switch 7750 Specifications 35

Switch 7750 Specifications

Ta bl e 46 provides detailed information about features of the Switch 7750.

Ta bl e 46 Specifications for the Switch 7750 System

Item 4-Slot Chassis 7-Slot Chassis 8-Slot Chassis

Dimensions (W x H x D)

Weight (with all components)

Fabric slots 1 1 2

I/O module slots 3 6

Fabric submodule options

I/O module options 48-port 10/100BASE-T FE PoE Module

PoE Fabric performance

Fabric performance 32 Gbps 64 Gbps 64 Gbps

Maximum aggregate system performance

Packet processing 24 Mpps 48 Mpps 48 Mpps

436 x 352.8 x 480 mm (17 x 14 x 19 in)

50 Kg (110 lbs) 70 Kg (154 lbs) 80 Kg (177 lbs)

4-port 1000BASE-X-GBIC 4-port 10/100/1000BASE-T

48-port 10/100/1000BASE-T PoE Module 48-port 10/100BASE-TX FE Module 48-port 10/100/1000BASE-T Module 48-port 100BASE-X SFP Module 20-Port 10/100/1000BASE-T Module 20-Port 1000BASE-X-SFP Module 12-port 10/100/1000BASE-T and 4-port 1000BASE-X SFP Module 12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T Module 8-port 1000BASE-X GE Module 8-port 10/100/1000BASE-T GE Module 1-port 10GBASE-X-XENPAK Module

96 Gbps 96 Gbps 96 Gbps

72 Gbps 54 Mpps

436 x 486.2 x 480 mm (17 x 19 x 19 in)

144 Gbps 108 Mpps

436 x 530.6 x 480 mm (17 x 21 x 19 in)

Page 36

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,

PoE input voltage -46 V to -55 V; 55.0 A

Max power consumption (all components installed)

Environment temperature and humidity

50 to 60 Hz

DC: -48 V to -60 V

350 W 650 W 800 W

0 to 40 0 C (32 to 104 0 F) and 10% to 90%

Page 37

INSTALLING THE SWITCH 7750

The following sections describe how to prepare and install the components of the Switch 7750:

■ Preparing to Install

■ General Site Requirements

■ Installation Checklist

■ Installing the Chassis

■ Installing the Cabling Rack

■ Installing a Module

■ Installing a Submodule

■ Connecting the Ground Wire

■ Connecting and Configuring Power

■ Installing the Fan Assembly

■ Installing Cables

■ Connecting Module Cables

■ Post-installation Checklist

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

Recommendations

Before installing your switch, note the following safety 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.

Page 38

38 CHAPTER 2: INSTALLING THE SWITCH 7750

■ During the installation, wear an antistatic wrist strap and antistatic gloves. See

“Static Electricity” on page 39 for additional information on preventing static.

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:

Laser Safety Some I/O modules on the Switch 7750 have optical ports. Make sure that an

General Site Requirements

■ 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.

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.

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 installation site are listed in

Ta bl e 47.

Page 39

Installation Checklist 39

Ta bl e 47 Temperature and Humidity Requirements

Temperature Relative humidity (noncondensing)

00 to 400C (320 to 1040F) 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:

Page 40

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

Cabinet

Installing on a

Workbench

When you are ready to install the Switch 7750 in the 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.

To install the switch on a workbench, take the following precautions:

■ 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.

Page 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 Module 41

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

Connecting and Configuring Power

Connecting AC Power

Cords

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.

The Switch 7750 requires power connection from the AC or DC power source and from the PoE power rack.

To connect AC power 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.

Page 43

Connecting and Configuring Power 43

1 2

Connecting DC Power

Cords

To connect DC power cords, do the following:

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

Configuring AC Power

Sources

1 -48 V input

2 Return

3 Grounding screw

4 Fastening screw

The dual AC input power module uses an internal switch that automatically selects 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

Power Cord

Follow these steps to connect the power cord from the PoE rack:

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 of the external PoE power supply. See

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)

Figure 34 for a detailed view.

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.

Page 45

Installing the Fan Assembly 45

Installing the Fan

To install the fan:

Assembly

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

Cable

The console cable is an 8-core shielded cable. One end of the cable has a crimped 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.

Connecting the AUX

Cable

See “Console Cable” on page 77 for cable illustration and pinout details.

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.

An AUX cable is used to connect the Switch 7750 to a modem in a remote dial-up 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.

See “AUX Cable” on page 77 for cable illustration and pinout details.

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

Cables

This section describes how to connect electrical and optical 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 Connector” on page 78 for an illustration of the RJ-45 connector and MDI/MDI-X 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 the local network port module. See

“Optical Fiber Cable Connectors” on page 79

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.

Page 47

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

Follow the parameters defined in Table 48 for binding cables with ties.

Ta bl e 48 Cable Binding Parameters

Cable Bundle Diameter Space Between Bundles

10 mm (0.5in) 80-150 mm (3.5 – 6 in)

10-30 mm (.5 – 1.2 in) 150-200 mm (6 – 8 in)

30 mm (1.2 in) 200-300 mm (8 – 12 in)

Post-installation Checklist

After you install your switch, use the checklist in Table 49 to verify that your switch 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.

Ta bl e 49 Installation Checklist

Item Normal Abnormal (Remarks)

Antistatic wrist strap

Console cable

Ground wire

Power cord

Fabric

I/O module

Fan frame

Page 49

CONFIGURING THE SWITCH 7750

The following sections of this chapter describe how to configure and boot the Switch 7750:

■ Configuring the Switch 7750 and a Local Terminal

■ Setting Terminal Parameters

■ Booting the Switch 7750

Configuring the Switch 7750 and a Local Terminal

Configure the local terminal and Switch 7750, using Figure 36 as a reference. The 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.

The Connection Description dialog box displays, as shown in Figure 37.

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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

box, shown in Connect using dropdown menu.

Figure 38 displays. Select the serial port to be used from the

Figure 38 Properties Dialog Box

3 After selecting serial ports, click OK. The port shown in Figure 39 displays and you

can set serial port parameters. Set the following parameters:

■ Baud rate = 9600

■ Databit = 8

■ Parity check = none

■ Stopbit = 1

■ Flow control = none

Page 51

Figure 39 COM1 Properties Dialog Box

Setting Terminal Parameters 51

4 Click OK. The HyperTerminal dialogue box displays, as shown in Figure 40.

Figure 40 HyperTerminal Window

5 Select Properties.

6 In the Properties dialog box, select the Settings tab, shown in Figure 41.

7 Select VT100 in the Emulation dropdown menu.

8 Click OK.

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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.

Page 53

Booting the Switch 7750 53

Powering up and

Booting

Turn on the power for the Switch 7750 and run the BootROM program. The terminal displays the following information:

Starting......

RAM Line....OK

System is booting.....................

****************************************** * * * Switch 7750 BOOTROM, Version 300 * * * ******************************************

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.

Page 55

MAINTAINING SOFTWARE

This chapter covers the following topics:

■ Upgrading Software

■ Lost Passwords

■ Using the BOOT Menu

Upgrading Software The following sections describe how to upgrade software on your Switch 7750:

■ Upgrading the Software Image

■ Upgrading Software with FTP

■ Upgrading Software Using The BOOT Menu

■ Upgrading Software Using Xmodem

■ Upgrading Software Using TFTP

Upgrading the Software

Image

Upgrading Software

with FTP

■ Upgrading Software in the Secondary Fabric of the 8-slot Chassis

Always save the configuration file before upgrading applications.

To upgrade the software image of a Switch 7750, use one of the following procedures:

■ “Upgrading Software with FTP” on page 55

■ “Upgrading Software Using The BOOT Menu”page 56

■ “Upgrading Software Using Xmodem” page 60

■ “Upgrading Software Using TFTP” page 62

Use the following procedure to upgrade software 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

ftp command.

3 Specify the file to boot the system from, using the boot command.

4 Reboot the system, using the reboot command.

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

Upgrading Software

Using The BOOT Menu

<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.

To perform this procedure, you must have a network connection to the 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 : 32MB Memory Size : 256MB

Page 57

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 1 then enter the appropriate information in the fields that display:

Load File name :sw7750003.app Switch IP address :10.10.110.1 Server IP address :10.10.110.50

3 Ty pe 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 0 to return to the boot menu.

5 From the boot menu, select option 2 then 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 0 to return to the Boot Menu.

2 Select option 2 from the Boot Menu. The following text displays:

File Number File Size(bytes) File Name

========================================================

1. 4 snmpboots

2(-). 6256229 SW7750-V300RE-8016.app

3. 1012 taskswitch.log

4. 151 private-data.txt

5. 228308 s.t

6. 1975 sw7750.cfg

7. 631736 Btm400.btm

8(*). 462848 SW7750-V300R-.app

9. 228376 S3com400.app

10. 199696 8241btm.app

11. 2427 vrpcfg.txt

12. 203460 lpcom400.app

13. 228308 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:

Page 59

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 Ty pe 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!

Ty pe 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 File Size(bytes) File Name

========================================================

1. 6256229 SW7750-V300RE-8016.app

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...............................................................

Upgrading Software

Using Xmodem

....................................................................

........................................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.

The Xmodem protocol transmits files through serial ports and supports both 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

Page 61

Upgrading Software 61

packet. If the check fails, negative characters are sent and the sending program sends the packet again.

1 Enter 1 in 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 3 in 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 5 to 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.

10 Click Browse in the Send file dialog box, shown in Figure 42 and select the

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.

12 Click Send. The dialog box shown in Figure 43 displays.

Figure 43 Xmodem File Send Dialog Box

Upgrading Software

Using TFTP

13 After the download is complete, the system interface is shown, as follows:

Loading ...CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC done!

14 Select 0 to return to the Boot Menu.

15 From the boot menu, select option 2 then select the newly downloaded file.

TFTP (Trivial File Transfer Protocol) is a simple file transfer protocol that is used 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.

Page 63

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

■ Verify that the TFTP server is set up according to the manufacturer's instructions

ping command.)

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.

Upgrading Software in

the Secondary Fabric of

the 8-slot Chassis

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

After you have upgraded the software on the primary Fabric in an 8-slot chassis, you must copy the software to the secondary Fabric.

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,

listed in

Appendix B.

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