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3Com 7754 Installation Manual

3com 7754: install guide
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See also: Configuration Manual
http://www.3com.com/
Part No. 10016428-AB
Published December 2007
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

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Summary of Contents for 3Com 7754

  • Page 1: Installation Guide

    Part No. 10016428-AB Published December 2007 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...
  • Page 2 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change. 3Com Corporation provides this documentation without warranty, term, or condition of any kind, either implied or expressed, including, but not limited to, the implied warranties, terms or conditions of merchantability, satisfactory quality, and fitness for a particular purpose.

  • Page 3: Table Of Contents

    ONTENTS BOUT UIDE Conventions Related Documentation 7750 C WITCH OMPONENTS 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 7750 NSTALLING WITCH Preparing to Install General Site Requirements Installation Checklist Installing the Chassis...
  • Page 4 ONTENTS AINTAINING Upgrading Software Lost Passwords Using the BOOT Menu ROUBLESHOOTING Troubleshooting the Configuration Troubleshooting Power Troubleshooting the Fan Troubleshooting the Modules AINTAINING Replacing a Power Module Replacing a Power Supply Replacing I/O Modules Replacing the Fan Assembly BTAINING Register Your Product to Gain Service Benefits Purchase Value-Added Services Troubleshoot Online Access Software Downloads...

  • Page 5: About This Guide

    (LAN) operations and familiarity with communication protocols that are used to interconnect LANs. Always download the Release Notes for your product from the 3Com World Wide Web site and check for the latest updates to software and product documentation Conventions Table 1 lists icon conventions that are used throughout this guide.
  • Page 6 BOUT UIDE...

  • Page 7: Switch 7750 Components

    The chapter describes the following Switch 7750 components: ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 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. Table 2 Hardware Features of the Switch 7750 Models Switch Backplane The Switch 7750 backplane is part of the integrated chassis and delivers...

  • Page 8: Fabric Module

    1: S 7750 C HAPTER WITCH OMPONENTS Fabric Module There are three Fabric modules for the Switch 7750: ■ ■ ■ 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.
  • Page 9 5 Fan LEDs 6 Power module LEDs 7 I/O module LEDs Figure 3 illustrates the front panel of the Fabric 32. Figure 3 Fabric 32 3C16872 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...
  • Page 10 1: S 7750 C HAPTER WITCH 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 ■...
  • Page 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.

  • Page 12: Fabric 32 Submodules

    1: S 7750 C HAPTER WITCH OMPONENTS Table 8 Ethernet Port LEDs (continued) ACTIVE Module LEDs The module LEDs show the status of the I/O modules, as described in Table 9. Table 9 I/O Module LEDs Power LEDs PWR1, PWR2, and PWR3 LEDs show the status of the power modules, as described in Table 10.
  • Page 13 Figure 4 4-Port 1000BASE-X-GBIC Submodule 3C16874 Ethernet GBIC port 2 Ethernet GBIC port LED Table 12 describes the 4-port 1000BASE-X-GBIC submodule LEDs. Table 12 LINK/ACT Table 13 lists the specifications for each of the 4-port 1000BASE-X-GBIC submodule. Table 13 Optional GBIC Module 1000BASE-SX-MM (3CGBIC91)

  • Page 14: I/O Modules

    1: S 7750 C HAPTER WITCH OMPONENTS Table 14 describes the 4-port 10/100/1000BASE-T submodule LEDs. Table 14 LINK Table 15 lists specifications of the 4-port 10/100/1000BASE-T submodule. Table 15 Specification Connector type Number of ports Port speed Cable and maximum transmission distance See “Electrical Port Connector”...
  • Page 15 ■ 48-port 10/100BASE-T FE The 48-port 10/100BASE-T FE PoE module provides 48 10/100 Mbps auto-sensing PoE Module Ethernet ports that provide a remote power supply to powered devices Figure 12illustrates the 48-port 10/100BASE-T FE PoE module. Figure 6 48-port 10/100BASE-T FE PoE Module Figure 13 illustrates the front panel and LEDs of the 48-port 10/100BASE-T FE PoE module.
  • Page 16 1: S 7750 C HAPTER WITCH OMPONENTS Table 17 Specifications for the 48-port 10/100BASE-T FE PoE Module (continued) Specification Port transmission speed Cables and maximum transmission distance Maximum power each port provides Compliance 48-port The 48-port 10/100/1000BASE-T PoE module provides 48 10/100/1000 Mbps 10/100/1000BASE-T PoE auto-sensing Ethernet ports that provide a remote power supply to powered Module...
  • Page 17 Table 22 describes the 48-port 10/100/1000BASE-T PoE module LEDs. Table 18 48-port 10/100/1000BASE-T PoE Module LED LINK/ACT Table 23 describes the specifications of the 48-port 10/100/1000BASE-T PoE module. Table 19 Specifications for the 48-port 10/100/1000BASE-T PoE Module Specification BootROM SDRAM Dimensions (L X W) Maximum power consumption Connector...
  • Page 18 1: S 7750 C HAPTER WITCH OMPONENTS Figure 11 illustrates the front panel and LEDs of the 48-port 10/100BASE-TX FE module. Figure 11 Front Panel of the 1 Ethernet port 2 Ethernet port LED Each 100 Mbps Ethernet port has a green LED, indicating LINK/ACTIVE status. Table 20 describes the 48-port 10/100BASE-TX FE module LED.
  • Page 19 48-port The 48-port 10/100/1000BASE-T module provides 48 10/100/1000 Mbps 10/100/1000BASE-T auto-sensing Ethernet electrical ports. Module Figure 12 illustrates the 48-port 10/100/1000BASE-T module. Figure 12 Figure 13 illustrates the front panel and LEDs of the 48-port 10/100/1000BASE-T module. Figure 13 Front Panel of the 3C16888 1 Ethernet port 2 Ethernet port LED...
  • Page 20 1: S 7750 C HAPTER WITCH OMPONENTS Table 23 Specifications for the 48-port 10/100/1000BASE-T Module (continued) Specification Compliance 48-port 100BASE-X SFP The 48-port 100BASE-X SFP module provides 48 100 Mbps full-duplex Ethernet Module optical ports. Figure 14 illustrates the 48-port 100BASE-X SFP module. Figure 14 Figure 15 illustrates the front panel and LEDs of the 48-port 100BASE-X SFP module.
  • Page 21 Table 25 Specifications for the Specification Dimensions (L X W) Maximum power consumption Connector Number of ports SFP module Port transmission speed Compliance Table 26 lists the cables for the 48-port 100BASE-X (SFP) ports Table 26 SFP module 100BASE-FX-MM-SFP 1310nm 100BASE-FX-SM-SFP 100BASE-FX-SM-LR-S 100BASE-FX-SM-VR-S...
  • Page 22 1: S 7750 C HAPTER WITCH 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 1 Ethernet port 2 Ethernet port LED Table 27 describes the status of the 24-port 100BASE-FX MMF FE module LEDs.
  • Page 23 Table 28 Specifications for the 24-Port 100BASE-FX MMF FE Module (continued) Specification Cables and maximum transmission distance Compliance 20-Port The 20-Port 10/100/1000BASE-T module provides 20 10/100/1000BASE-T 10/100/1000BASE-T auto-sensing Ethernet ports. Module Figure 18 illustrates the 20-Port 10/100/1000BASE-T Module. Figure 18 20-Port 10/100/1000BASE-T Module Figure 19 illustrates the front panel of the 20-port 10/100/1000BASE-T module.
  • Page 24 1: S 7750 C HAPTER WITCH OMPONENTS Table 30 lists specifications of the 20-port 10/100/1000BASE-T module. Table 30 Specifications for the Specification BootROM SDRAM Dimensions (L x W) Power consumption Connector Number of ports Transmission rate Cable and maximum transmission distance Compliance 20-Port 1000BASE-X-SFP The 20-port 1000BASE-X-SFP module provides 20 1000 BASE-X full duplex ports...
  • Page 25 1 Ethernet port 2 Ethernet port LED Table 31 describes the 20-port 1000BASE-X-SFP module LEDs. Table 31 20-Port 1000BASE-X LINK/ACT Table 32 lists specifications of the 20-port 1000BASE-X-SFP module. Table 32 Specifications for the Specification BootROM SDRAM Dimensions (L x W) Power consumption Connector Number of ports...
  • Page 26 1: S 7750 C HAPTER WITCH OMPONENTS Figure 23 Front Panel of the 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 33 LINK/ACT Table 34 lists specifications of the 12-port 10/100/1000BASE-T and 4-port...
  • Page 27 Table 35 lists the cables for the 1000BASE-X (SFP) ports. Table 35 SFP Cables for the SFP Module SFP module SFP-GE-SX-MM850-A 850nm SFP-GE-LX-SM1310-A 1310nm SFP-GE-LH40-SM1310 SFP-GE-LH40-SM1550 1550nm SFP-GE-LH70-SM1550 SFP-GE-LH100-SM155 SFP-GE-LH70-SM1470 SFP-GE-LH70-SM1490 SFP-GE-LH70-SM1510 SFP-GE-LH70-SM1530 SFP-GE-LH70-SM1550 SFP-GE-LH70-SM1570 SFP-GE-LH70-SM1590 SFP-GE-LH70-SM1610 SFP-GE-T 12-port 1000BASE-X SFP 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.
  • Page 28 1: S 7750 C HAPTER WITCH OMPONENTS 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 10/100/1000BASE-T Module 1 SFP port 2 SFP port LED 3 Ethernet port 4 Ethernet port LED Table 36 describes the 12-port 1000BASE-X SFP and 4-port 10/100/1000BASE-T...
  • Page 29 12-port 1000BASE-X SFP and 4-port Table 37 Specifications for the 10/100/1000BASE-T Module (continued) Specification Description Number of ports Transmission rate 1000 Mbps full duplex (optical/electrical) 10/100 Mbps half-/full-duplex (electrical) Cable and maximum Category-5 twisted pair with maximum transmission distance transmission distance of 100 m (328 ft) Compliance IEEE 802.3...
  • Page 30 1: S 7750 C HAPTER WITCH OMPONENTS Table 38 SFP Cables for the 10/100/1000BASE-T Module SFP module SFP-GE-LH70-SM1590 SFP-GE-LH70-SM1610 SFP-GE-T 8-port 1000BASE-X GBIC The 8-port 1000BASE-X GBIC module provides 8 external GBIC module ports. A Module GBIC module is used for each data receiving/transmitting channel. The following modules are available: ■...
  • Page 31 Table 39 describes the Table 39 8-Port 1000BASE-X GBIC Module LEDs LINK The cables for each of the supported 8GBIC modules are described inTable 40. Table 40 GBIC Module Port Cables GBIC Module Type 3CGBIC91 3CGBIC92 3CGBIC97 Table 41 describes the specifications of the 8-port 1000BASE-X GBIC module. Table 41 Specifications for the 8-Port 1000BASE-X GBIC Module Specification BootROM...
  • Page 32 1: S 7750 C HAPTER WITCH OMPONENTS 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 Table 42 describes the LEDs on the 8-port 10/100/1000BASE-T GE module.

  • Page 33: Power Module

    Table 43 Specifications for the Specification Port transmission speed Cables and maximum transmission distance Compliance 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.

  • Page 34: Fan Assembly

    1: S 7750 C HAPTER WITCH 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. Table 45 PoE Power Modules Input voltage 100 to 140 V 200 to 240 V...

  • Page 35: Switch 7750 Specifications

    Figure 31 Fan Assembly Switch 7750 Table 46 provides detailed information about features of the Switch 7750. Specifications Table 46 Specifications for the Switch 7750 System Item Dimensions (W x H x D) Weight (with all components) Fabric slots I/O module slots Fabric submodule options I/O module options...
  • Page 36 1: S 7750 C HAPTER WITCH OMPONENTS Table 46 Specifications for the Switch 7750 System (continued) Item Input voltage PoE input voltage Max power consumption (all components installed) Environment temperature humidity 4-Slot Chassis 7-Slot Chassis AC: 100 V to 240 V, 50 to 60 Hz -46 V to -55 V;...

  • Page 37: Installing The Switch 7750

    ■ ■ ■ WARNING: Only trained and qualified personnel should install and maintain 3Com products. Preparing to Install This section provides guidelines for preparing your site and switch for installation. General Safety Before installing your switch, note the following safety recommendations: Recommendations ■...

  • Page 38: General Site Requirements

    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.

  • Page 39: Installation Checklist

    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.

  • Page 40: Installing The Chassis

    2: I HAPTER NSTALLING WITCH ■ ■ ■ Installing the Chassis You can install the Switch 7750 in a standard, 19-inch cabinet or on a workbench. Installing in a Standard When you are ready to install the Switch 7750 in the cabinet: Cabinet 1 Carry the switch to the front of the cabinet.

  • Page 41: Installing A Module

    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.

  • Page 42: Connecting The Ground Wire

    7750 To connect the ground wire: 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.
  • Page 43 Connecting DC Power To connect DC power cords, do the following: Cords 1 Power off all the related parts of the switch when connecting the DC power cord. 2 Loosen the mounting screw and remove the cover of the connection terminals on the DC power distribution box.
  • Page 44 2: I HAPTER NSTALLING WITCH Connecting the PoE Follow these steps to connect the power cord from the PoE rack: Power Cord 1 Loosen the mounting screw of the PoE terminal block on the rear panel of the switch. 2 Insert the -48V OT terminal of the DC power cord to the NEG (-) terminal of the switch and fasten the mounting screw;...

  • Page 45: Installing The Fan Assembly

    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.
  • Page 46 2: I HAPTER NSTALLING WITCH Connecting Module This section describes how to connect electrical and optical cables. Cables Connecting Electrical Port Cables The 48-port 10/100BASE-T module and 8-port 10/100/1000BASE-T module require a RJ-45 connector and category-5 twisted pair cable. See “Electrical Port Connector”...

  • Page 47: Installing Cabling

    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.

  • Page 48: Post-Installation Checklist

    2: I HAPTER NSTALLING WITCH Follow the parameters defined in Table 48 for binding cables with ties. Table 48 Cable Binding Parameters Cable Bundle Diameter 10 mm (0.5in) 10-30 mm (.5 – 1.2 in) 30 mm (1.2 in) Post-installation After you install your switch, use the checklist in Table 49 to verify that your switch Checklist operates correctly.

  • Page 49: Configuring The Switch 7750

    The following sections of this chapter describe how to configure and boot the Switch 7750: ■ ■ ■ Configuring the Configure the local terminal and Switch 7750, using Figure 36 as a reference. The Switch 7750 and a terminal (a PC in this example) is connected to the switch console port using a Local Terminal console cable.
  • Page 50 3: C HAPTER ONFIGURING THE WITCH 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.
  • Page 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 Emulation dropdown menu.

  • Page 52: Booting The Switch 7750

    3: C HAPTER ONFIGURING THE Figure 41 Settings Tab Booting the Switch Before powering on the Switch 7750, verify that: 7750 ■ ■ ■ ■ ■ 7750 WITCH 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.
  • Page 53 Turn on the power for the Switch 7750 and run the BootROM program. The Booting terminal displays the following information: Starting... RAM Line...OK System is booting... Copyright(C) 2001-2005 by 3Com Corporation, Inc. Creation date: Mar 25 2003, 09:33:05 CPU type CPU Clock Speed : 200Mhz BUS Clock Speed : 66Mhz Memory Size FAB64 self testing...
  • Page 54 3: C 7750 HAPTER ONFIGURING THE WITCH 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 The following sections describe how to upgrade software on your Switch 7750: ■ ■ ■ ■ ■ ■ Always save the configuration file before upgrading applications. Upgrading the Software To upgrade the software image of a Switch 7750, use one of the following Image procedures:...
  • Page 56 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: 230 User logged in [ftp]bin 200 Type set to I.
  • Page 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...”...
  • Page 58 4: M HAPTER AINTAINING 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.
  • Page 59 The file you selected is SW7750-V300R-.app, are you sure? Yes or No(Y/N) y On reboot,SW7750-V300R-.app will become the default application file to boot! 7 Type Y to run the primary image: Do you want to run snec400.app now? Yes or No(Y/N)? Y No Backup Image If you do not enter the number of a backup boot file, the following text displays:...
  • Page 60 4: M HAPTER AINTAINING 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-V300RE-8016.app There are 3 files in this package...
  • Page 61 packet. If the check fails, negative characters are sent and the sending program sends the packet again. 1 Enter 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.
  • Page 62 4: M HAPTER AINTAINING 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: Loading ...CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC done! 14 Select 15 From the boot menu, select option...

  • Page 63: Lost Passwords

    A TFTP Server program is shipped on the CDROM with the Switch 7750. Before you upgrade: ■ ■ 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>...
  • Page 64 BOOT Menu: Boot Menu Enter your choice(0-5): ****************************************** 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...
  • Page 65 Using the BOOT Menu CAUTION: While using the switch, please keep in mind the modified BOOTROM password.
  • Page 66 4: M HAPTER AINTAINING OFTWARE...

  • Page 67: Troubleshooting

    This chapter covers the following topics: ■ ■ ■ ■ The simplest way to diagnose a fault is to check the system status LEDs on the Fabric modules. In addition, with the DeviceMgr network management system, you can also locate the fault through management software. Troubleshooting the After the switch is powered on, booting information is displayed on the Configuration...

  • Page 68: Troubleshooting The Fan

    5: T HAPTER ROUBLESHOOTING Table 50 describes power LEDs on the Fabric. (continued) Table 50 Power LEDs on the Fabric FAIL Troubleshooting the If the fan OK LED is off, check that: ■ ■ ■ ■ Table 51 describes fan LEDs on the Fabric. Table 51 Fan LEDs on the Fabric FAIL Troubleshooting the...

  • Page 69: Maintaining Hardware

    This chapter covers the following topics: ■ ■ ■ ■ The procedures in this chapter should be performed by trained service personnel only. Replacing a Power To replace a power module, you need: Module ■ ■ WARNING: Insure that the switch is powered off before removing or installing a power module.

  • Page 70: Replacing A Power Supply

    6: M HAPTER AINTAINING 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 To replace a power supply, you need: Supply ■...

  • Page 71: Replacing I/O Modules

    Replacing I/O Modules To replace an I/O module, you need: ■ ■ To remove a module: 1 Remove all the cables from the module to be removed. 2 Loosen the captive screws. 3 Hold the ejector levers on the module with both hands, and press them toward both sides to separate the connectors of the module from the motherboard.
  • Page 72 6: M HAPTER AINTAINING 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: Obtaining Upport For Your Switch

    Downloads software initially purchased with the product. In order to access these Software Updates you must first register your product on the 3Com web site at http://eSupport.3com.com/ First time users will need to apply for a user name and password. A link to...

  • Page 74: Contact Us

    ■ ■ To send a product directly to 3Com for repair, you must first obtain a return authorization number (RMA). Products sent to 3Com, without authorization numbers clearly marked on the outside of the package, will be returned to the sender unopened, at the sender’s expense.
  • Page 75 Ireland 01407 3387 Israel 1800 945 3794 Italy 199 161346 You can also obtain support in this region using the following URL: http://emea.3com.com/support/email.html Latin America Telephone Technical Support and Repair Antigua 1 800 988 2112 Argentina 0 810 444 3COM...
  • Page 76 B: O HAPTER BTAINING UPPORT FOR YOUR WITCH...

  • Page 77: Switch 7750 Cables

    This appendix covers the following types of cables and connectors: ■ ■ ■ ■ Console Cable Figure 44 illustrates the console cable and connectors. Figure 44 The Console cable Enlarged A side Enlarged A side Table 53 lists console cable pin-outs. Table 53 Console Cable Pin-outs AUX Cable Figure 45 illustrates the AUX cable.
  • Page 78 A: S 7750 C PPENDIX WITCH ABLES Figure 45 The AUX Cable Enlarged A side Enlarged A side Table 54 lists the AUX cable pin-outs. Table 54 AUX Cable Pin-outs RJ-45 Electrical Port Figure 46 illustrates the RJ-45 connector. Connector Figure 46 The RJ-45 Connector PIN #1 Table 55 lists RJ-45 MDI port pin-outs.
  • Page 79 Table 55 RJ-45 MDI Port Pin-outs (continued) Pinout 10BASE-T/100BASE-TX Tx = Send data Rx = Receive data BI = I-directional data. Table 56 lists Table 56 RJ-45 MDI-X Port Pinouts Pinout 10BASE-T/100 BASE-TX Optical Fiber Cable Figure 47 illustrates the SC optical fiber cable connector. Connectors Figure 47 SC Optical Fiber Connector 1000BASE-T...
  • Page 80 A: S 7750 C PPENDIX WITCH 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...

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