Page 2 - Com Corporation
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 writ...
Page 3 - ONTENTS
C ONTENTS A BOUT T HIS G UIDE Conventions 5Related Documentation 5 S WITCH 7750 C OMPONENTS Switch Chassis 7Switch Backplane 7Fabric Module 8Fabric 32 Submodules 12I/O Modules 14Power Module 33Power Distribution 33External PoE Power System 33Fan Assembly 34Switch 7750 Specifications 35 I NSTALLING T...
Page 5 - Conventions; Switch 7750 Command Reference Guide; Table 1; Notice Icons; Icon; Information note
A BOUT T HIS G UIDE 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 a...
Page 7 - Switch Chassis; Table 2; Hardware Features of the Switch 7750 Models
1 S WITCH 7750 C OMPONENTS 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 T...
Page 8 - Fabric Module; There are three Fabric modules for the Switch 7750:; Figure 1; Figure 2 illustrates the front panel of the Fabric 64.; Figure 2
8 C HAPTER 1: S WITCH 7750 C OMPONENTS 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 ...
Page 9 - Figure 3 illustrates the front panel of the Fabric 32.; Figure 3; Table 3 lists Fabric specifications.; Submodule Slot; Table 3
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 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 lists Fabric specifications...
Page 10 - Fixed Ports; The Switch 7750 Fabric modules provide the following fixed ports:; LC
10 C HAPTER 1: S WITCH 7750 C OMPONENTS ■ 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 ■ 10...
Page 11 - Console Port; Table 6 lists console port specifications.; Ethernet Port; Table 7 lists Ethernet port specifications.
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 function...
Page 12 - Module LEDs; Fan LEDs show the status of the fan frame, as described in Table 11.; Reset Button; The reset button resets the entire system.; Fabric 32 Submodules; Submodule
12 C HAPTER 1: S WITCH 7750 C OMPONENTS Module LEDs The module LEDs show the status of the I/O modules, as described in Table 9. Power LEDs PWR1, PWR2, and PWR3 LEDs show the status of the power modules, as described in Table 10. Fan LED Fan LEDs show the status of the fan frame, as described in Tab...
Page 13 - Figure 4; Figure 5; LED
Fabric 32 Submodules 13 Figure 4 4-Port 1000BASE-X-GBIC Submodule Ethernet GBIC port 2 Ethernet GBIC port LED Table 12 describes the 4-port 1000BASE-X-GBIC submodule LEDs. Table 13 lists the specifications for each of the 4-port 1000BASE-X-GBIC submodule. 4-Port 10/100/1000BASE-T Submodule The 4-Por...
Page 14 - Consider the following when selecting I/O modules:
14 C HAPTER 1: S WITCH 7750 C OMPONENTS Table 14 describes the 4-port 10/100/1000BASE-T submodule LEDs. Table 15 lists specifications of the 4-port 10/100/1000BASE-T submodule. See “Electrical Port Connector” on page 78 for an illustration of the RJ-45 connector and MDI/MDI-X pinout details. I/O Mod...
Page 15 - PoE Module
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 12illu...
Page 16 - Module; Figure 8; Ethernet port; Specification
16 C HAPTER 1: S WITCH 7750 C OMPONENTS 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 ...
Page 17 - FE Module
I/O Modules 17 Table 22 describes the 48-port 10/100/1000BASE-T PoE module LEDs. Table 23 describes the specifications of the 48-port 10/100/1000BASE-T PoE module. 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. Figu...
Page 21 - MMF FE Module; SFP module
I/O Modules 21 Table 26 lists the cables for the 48-port 100BASE-X (SFP) ports 24-port 100BASE-FX MMF FE Module 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. Dimensions (L X W) ...
Page 22 - Each 100 Mbps optical port has a green LED, as shown in Figure 17.
22 C HAPTER 1: S WITCH 7750 C OMPONENTS 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 Table 27 describes the status of the 24-port 100BASE...
Page 26 - SFP Module
26 C HAPTER 1: S WITCH 7750 C OMPONENTS Figure 23 Front Panel of the 12-port 10/100/1000BASE-T and 4-port 1000BASE-X SFP Module 1 Ethernet port 2 Ethernet port LED 3 SFP port 4 SFP LED Table 31 describes the 12-port 10/100/1000BASE-T and 4-port 1000BASE-X SFP module LEDs. Table 34 lists specificatio...
Page 29 - Table 38 lists the cables for the 1000BASE-X SFP ports.
I/O Modules 29 Table 38 lists the cables for the 1000BASE-X SFP ports. Number of ports 16 Transmission rate 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 ...
Page 30 - Every GBIC port has a LED, as shown in Figure 27.
30 C HAPTER 1: S WITCH 7750 C OMPONENTS 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 illustrat...
Page 31 - Table 39 describes the
I/O Modules 31 Table 39 describes the 8-Port 1000BASE-X GBIC module LEDs. The cables for each of the supported 8GBIC modules are described inTable 40. Table 41 describes the specifications of the 8-port 1000BASE-X GBIC module. 8-port 10/100/1000BASE-T GE Module The 8-port 10/100/1000BASE-T GE module...
Page 33 - Power Module; Figure 30 illustrates the Switch 7750 PoE power system.
Power Module 33 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 t...
Page 34 - Switch 7750 PoE Power Supply; The Switch 7750 supports PoE external input power up to 2400 W.; Fan Assembly; Figure 31 illustrates the fan assembly for the 7- and 8-slot chassis.; PoE Power Modules; Input voltage
34 C HAPTER 1: S WITCH 7750 C OMPONENTS Figure 30 Switch 7750 PoE Power Supply The Switch 7750 supports PoE external input power up to 2400 W. Table 45 describes the capabilities of the Switch 7750 PoE power module. The Switch 7750 provides power through Ethernet ports on the PoE-supported I/O modul...
Page 35 - Item
Switch 7750 Specifications 35 Figure 31 Fan Assembly Switch 7750 Specifications Table 46 provides detailed information about features of the Switch 7750. 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 (...
Page 37 - Preparing to Install; General Safety
2 I NSTALLING T HE S WITCH 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 Submod...
Page 38 - Electrical Safety; Do not move the switch alone. Work with another person.; Laser Safety; Never look at the transmit LED/laser through a magnifying device; Temperature and Humidity
38 C HAPTER 2: I NSTALLING T HE S WITCH 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 77...
Page 39 - Static Electricity; Installation Checklist; Temperature and Humidity Requirements; Temperature
Installation Checklist 39 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 th...
Page 40 - Installing the Chassis; Installing in a Standard
40 C HAPTER 2: I NSTALLING T HE S WITCH 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 H...
Page 41 - Installing a Module; Wear an antistatic wrist strap.
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 cha...
Page 42 - Connecting AC Power; AC Power Cord Connection; For surge protection, the power should be channelled through an
42 C HAPTER 2: I NSTALLING T HE S WITCH 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...
Page 43 - Connecting and Configuring Power; Connecting DC Power; To connect DC power cords, do the following:; Connecting the DC Power Cord; Configuring AC Power
Connecting and Configuring Power 43 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....
Page 44 - Connecting the PoE; Follow these steps to connect the power cord from the PoE rack:; Back of the PoE Rack; For detailed instructions on how to install the PoE rack, see the
44 C HAPTER 2: I NSTALLING T HE S WITCH 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...
Page 45 - Installing the Fan Assembly; To avoid injury, do not touch any naked wire, terminal, or any other; Installing Cables; Connecting the Console
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 ...
Page 46 - Connecting Module; Use the following steps to connect the port:; Connecting Optical Fiber Cables; The following modules require fiber optic cables:; SC fiber connector; To attach the SC fiber connector:
46 C HAPTER 2: I NSTALLING T HE S WITCH 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...
Page 47 - When connecting an SC fiber connector, the switch TX must be; MT-RJ fiber connector; Installing Cabling; Cable Binding
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 optic...
Page 48 - Confirm that you have turned off the power before checking your; Cable Bundle Diameter
48 C HAPTER 2: I NSTALLING T HE S WITCH 7750 Follow the parameters defined in Table 48 for binding cables with ties. 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 p...
Page 49 - Connecting the Switch 7750 to a PC; HyperTerminal
3 C ONFIGURING THE S WITCH 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 t...
Page 50 - Connection Description Dialog Box; Enter the name of the new connection in the; Properties Dialog Box; After selecting serial ports, click
50 C HAPTER 3: C ONFIGURING THE S WITCH 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 Figure 38 displays. Select the serial port to be used from the Connect using dropdown menu. Figure 38 Properties D...
Page 51 - OK; HyperTerminal Window; Properties
Setting Terminal Parameters 51 Figure 39 COM1 Properties Dialog Box 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 Emu...
Page 52 - Settings Tab; Before powering on the Switch 7750, verify that:
52 C HAPTER 3: C ONFIGURING THE S WITCH 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 prope...
Page 54 - Enter
54 C HAPTER 3: C ONFIGURING THE S WITCH 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 - Upgrading Software; Upgrading the Software; ftp; Now user privilege is 3 level, and just commands which level is
4 M AINTAINING S OFTWARE 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 Soft...
Page 56 - anonymous
56 C HAPTER 4: M AINTAINING S OFTWARE 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 ...
Page 57 - To access the BOOT Menu, press; : Display all files in flash; Downloading an Application to Flash Memory
Upgrading Software 57 FAB96 self testing.......................................... SDRAM Data lines Selftest.................................OK! SDRAM Address lines Selftest..............................OK! SDRAM fast selftest.......................................OK! Please check LEDs.................
Page 58 - Selecting the Application File for the Boot
58 C HAPTER 4: M AINTAINING S OFTWARE 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 ...
Page 59 - No Backup Image
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 ...
Page 60 - display boot
60 C HAPTER 4: M AINTAINING S OFTWARE 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-V300R...
Page 62 - Send File dialog box; Xmodem; Xmodem File Send Dialog Box
62 C HAPTER 4: M AINTAINING S OFTWARE 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 13 After the download is complete, the system interface is shown, as follows...
Page 63 - A TFTP Server program is shipped on the CDROM with the Switch 7750.; ping; To upgrade using TFTP:; boot boot-loader primary filename; The following example illustrates this procedure:; Transfer file in binary mode.; reboot; Upgrading Software in; Copy the code to the secondary Fabric.; boot boot-loader primary; Lost Passwords
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 ping command.) ■ Verify that the TFTP server is set up according to the manufacturer's instructions and t...
Page 64 - If you press
64 C HAPTER 4: M AINTAINING S OFTWARE Starting...... RAMLine.....OK System is booting..................... ****************************************** * * * Switch 7750 BOOTROM, Version 516 * * * ****************************************** Copyright (c) : 2003-2005 3Com Corporation Creation date : Jan...
Page 65 - Using the BOOT Menu; While using the switch, please keep in mind the modified BOOTROM
Using the BOOT Menu 65 CAUTION: While using the switch, please keep in mind the modified BOOTROM password.
Page 67 - ROUBLESHOOTING; No information is
5 T ROUBLESHOOTING This chapter covers the following topics: ■ Troubleshooting the Configuration ■ Troubleshooting Power ■ Troubleshooting the Fan ■ Troubleshooting the Modules The simplest way to diagnose a fault is to check the system status LEDs on the Fabric modules. In addition, with the Device...
Page 68 - Every heat dissipation fan is working normally.
68 C HAPTER 5: T ROUBLESHOOTING Table 50 describes power LEDs on the Fabric. (continued) 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. ■...
Page 69 - Removing the AC Power
6 M AINTAINING H ARDWARE This chapter covers the following topics: ■ Replacing a Power Module ■ Replacing a Power Supply ■ Replacing I/O Modules ■ Replacing the Fan Assembly The procedures in this chapter should be performed by trained service personnel only. Replacing a Power Module To replace a po...
Page 70 - Do not power on the switch until you reconnect all the components.
70 C HAPTER 6: M AINTAINING H ARDWARE 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 antista...
Page 71 - Replacing I/O Modules; To avoid injury, do not touch any naked wire, terminal, or any part of
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 th...
Page 72 - If the fan fails, replace it with a new one without delay before
72 C HAPTER 6: M AINTAINING H ARDWARE 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.
Page 73 - Troubleshoot Online; Com Knowledgebase
B O BTAINING S UPPORT FOR YOUR S WITCH Register Your Product to Gain Service Benefits To take advantage of warranty and other service benefits, you must first register your product at http://eSupport.3com.com/ . 3Com eSupport services are based on accounts that you create or have authorization to ac...
Page 74 - Software Upgrades; Contact Us; Country
74 C HAPTER B: O BTAINING S UPPORT FOR YOUR S WITCH 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 U...
Page 75 - Telephone Technical Support and Repair
Telephone Technical Support and Repair 75 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...
Page 77 - Console Cable; Signal
A S WITCH 7750 C ABLES This appendix covers the following types of cables and connectors: ■ Console Cable ■ AUX Cable ■ Electrical Port Connector ■ Optical Fiber Cable Connectors Console Cable Figure 44 illustrates the console cable and connectors. Figure 44 The Console cable Table 53 lists console ...
Page 78 - Figure 46 illustrates the RJ-45 connector.
78 A PPENDIX A: S WITCH 7750 C ABLES Figure 45 The AUX Cable Table 54 lists the AUX cable pin-outs. Electrical Port Connector Figure 46 illustrates the RJ-45 connector. Figure 46 The RJ-45 Connector Table 55 lists RJ-45 MDI port pin-outs. Table 54 AUX Cable Pin-outs RJ-45 Signal Direction DB-25 DB-9...
Page 79 - Optical Fiber Cable Connectors; Table 56 lists
Optical Fiber Cable Connectors 79 Tx = Send data Rx = Receive data BI = I-directional data. Table 56 lists RJ-45 MDI-X Port Pin-outs. Optical Fiber Cable Connectors Figure 47 illustrates the SC optical fiber cable connector. Figure 47 SC Optical Fiber Connector 3 Rx+ Receive data BIDB+ Send data to ...
Page 80 - Figure 48. illustrates the MT-RJ fiber optic cable connector.; The MT-RJ Fiber Connector; Figure 49 illustrates the LC connector.; LC Connector
80 A PPENDIX A: S WITCH 7750 C ABLES Figure 48. illustrates the MT-RJ fiber optic cable connector. Figure 48 The MT-RJ Fiber Connector Figure 49 illustrates the LC connector. Figure 49 LC Connector
