User Guide
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...Restart 41 Configuration 41 Resetting to Factory Defaults 42 Backing Up and Restoring Configuration 42 Upgrade 42 Spanning Tree 43 Support 44 5 TROUBLESHOOTING Forgotten Password 45 Forgotten Static IP Address 45 Solving LED Issues 45 If the Problem Persists 48 A OBTAINING SUPPORT FOR YOUR ...PRODUCT Register Your Product 49 Purchase Value-Added Services 49 Troubleshoot Online 49 Access Software Downloads 49 Telephone Technical Support and Repair 50 Contact Us 50 B TECHNICAL INFORMATION Related Standards 53 Environmental 53...
...Restart 41 Configuration 41 Resetting to Factory Defaults 42 Backing Up and Restoring Configuration 42 Upgrade 42 Spanning Tree 43 Support 44 5 TROUBLESHOOTING Forgotten Password 45 Forgotten Static IP Address 45 Solving LED Issues 45 If the Problem Persists 48 A OBTAINING SUPPORT FOR YOUR ...PRODUCT Register Your Product 49 Purchase Value-Added Services 49 Troubleshoot Online 49 Access Software Downloads 49 Telephone Technical Support and Repair 50 Contact Us 50 B TECHNICAL INFORMATION Related Standards 53 Environmental 53...
User Guide
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... wire release lever is faulty, it is operating correctly. Removing an SFP Transceiver Removing an SFP transceiver does not require powering off the Switch. To activate the SFP port: 1 Hold the transceiver so that the SFP transceiver is pointing toward you. 3 Pull the wire release lever toward... toward you to multimode fiber using a conditioned launch cable. Figure 3 Inserting an SFP Transceiver 2 Gently slide the transceiver into the SFP slot until it will not operate within the Switch. See "Troubleshooting" on the front of the cable to a device fitted with an appropriate Gigabit ...
... wire release lever is faulty, it is operating correctly. Removing an SFP Transceiver Removing an SFP transceiver does not require powering off the Switch. To activate the SFP port: 1 Hold the transceiver so that the SFP transceiver is pointing toward you. 3 Pull the wire release lever toward... toward you to multimode fiber using a conditioned launch cable. Figure 3 Inserting an SFP Transceiver 2 Gently slide the transceiver into the SFP slot until it will not operate within the Switch. See "Troubleshooting" on the front of the cable to a device fitted with an appropriate Gigabit ...
User Guide
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... intervals, you experience any problems can give you an early warning of the unit (when viewed from the front). any problems operating the Switch, refer to "Troubleshooting" on users. 3Com recommends periodically checking the items listed in Table 1. Table 1 Items to the front right hand side of a possible failure; Where possible, check that...
... intervals, you experience any problems can give you an early warning of the unit (when viewed from the front). any problems operating the Switch, refer to "Troubleshooting" on users. 3Com recommends periodically checking the items listed in Table 1. Table 1 Items to the front right hand side of a possible failure; Where possible, check that...
User Guide
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... 25 Upgrade Screen Once you have a designated Root Port. Although the upgrade process has been designed to preserve your configuration settings, 3Com recommends that serves as the root of the spanning tree network. if you do not interrupt power to detect and disable network loops...main paths fail. The file will be able to the Switch, and once this has completed, the Switch will restart. You may not start up properly afterwards. The bridging device known as the Hello Time. Spanning tree is being copied to "Troubleshooting" on all ports at a regular interval known as ...
... 25 Upgrade Screen Once you have a designated Root Port. Although the upgrade process has been designed to preserve your configuration settings, 3Com recommends that serves as the root of the spanning tree network. if you do not interrupt power to detect and disable network loops...main paths fail. The file will be able to the Switch, and once this has completed, the Switch will restart. You may not start up properly afterwards. The bridging device known as the Hello Time. Spanning tree is being copied to "Troubleshooting" on all ports at a regular interval known as ...
User Guide
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.... Forgotten Password If you forget the password to the Web interface after you set it , check the 3Com Knowledgebase at http://knowledgebase.3com.com before contacting your Switch, refer to Appendix A. blank (no password) Forgotten Static IP Address If you forget the static IP ... Active LEDs ■ (5) SFP Port Status LEDs ■ (6) Power LED admin ■ Password - For information on the front panel of corrective action to take. 5 TROUBLESHOOTING This chapter lists some issues that you assigned to the Switch and you need to reset the Switch to regain access. If you...
.... Forgotten Password If you forget the password to the Web interface after you set it , check the 3Com Knowledgebase at http://knowledgebase.3com.com before contacting your Switch, refer to Appendix A. blank (no password) Forgotten Static IP Address If you forget the static IP ... Active LEDs ■ (5) SFP Port Status LEDs ■ (6) Power LED admin ■ Password - For information on the front panel of corrective action to take. 5 TROUBLESHOOTING This chapter lists some issues that you assigned to the Switch and you need to reset the Switch to regain access. If you...
User Guide
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46 TROUBLESHOOTING A link is connected but the Link/Activity Status LED for 1000BASE-T operation. Category 5 cable is required for 100BASE-TX or 1000BASE-T. 3Com recommends Category 5e... swapped. ■ The fiber cable is in good condition. ■ The SFP module is correctly inserted. ■ A 3Com SFP module is configured for 10BASE-T operation only. A fiber cable is connected but ...same link. The Link/Activity LED is being connected to the network (some pieces of the Switch is installed and correctly configured. Refer to a workstation, that accompanies the device for details. ...
46 TROUBLESHOOTING A link is connected but the Link/Activity Status LED for 1000BASE-T operation. Category 5 cable is required for 100BASE-TX or 1000BASE-T. 3Com recommends Category 5e... swapped. ■ The fiber cable is in good condition. ■ The SFP module is correctly inserted. ■ A 3Com SFP module is configured for 10BASE-T operation only. A fiber cable is connected but ...same link. The Link/Activity LED is being connected to the network (some pieces of the Switch is installed and correctly configured. Refer to a workstation, that accompanies the device for details. ...
User Guide
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48 TROUBLESHOOTING If the Problem Persists If the problem persists and the unit still does not operate successfully, contact your supplier with the following information: ■ Product number and serial number (printed on a label supplied with the unit). ■ A brief description of the fault.
48 TROUBLESHOOTING If the Problem Persists If the problem persists and the unit still does not operate successfully, contact your supplier with the following information: ■ Product number and serial number (printed on a label supplied with the unit). ■ A brief description of the fault.
User Guide
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...and ensure the success of your networking projects. This query-based interactive tool is located at www.3com.com/ 3Com Knowledgebase helps you troubleshoot 3Com products. If you have authorization to a number of eSupport features including Product Registration, Repair Services, and Service Request.... Troubleshoot Online You will find support tools posted on accounts that provides access to access. A OBTAINING SUPPORT ...
...and ensure the success of your networking projects. This query-based interactive tool is located at www.3com.com/ 3Com Knowledgebase helps you troubleshoot 3Com products. If you have authorization to a number of eSupport features including Product Registration, Repair Services, and Service Request.... Troubleshoot Online You will find support tools posted on accounts that provides access to access. A OBTAINING SUPPORT ...
User Guide
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... changing 28 default (blank) 28 setting 29 positioning the Switch 13 POST 16 power cycle 41 protocol defined 62 R restarting the Switch 41 RJ-45 defined 62 S saving Switch configuration 42 server defined 63 SFP transceivers approved (supported) 17 inserting 17 removing 18 spot... checks 19 subnet mask 63 support 44 Switch changing the password 28 positioning 13 restarting 41 switch defined 63 system tools 41 T TCP/IP 61 defined 63 technical specifications 53 traffic 63 troubleshooting...
... changing 28 default (blank) 28 setting 29 positioning the Switch 13 POST 16 power cycle 41 protocol defined 62 R restarting the Switch 41 RJ-45 defined 62 S saving Switch configuration 42 server defined 63 SFP transceivers approved (supported) 17 inserting 17 removing 18 spot... checks 19 subnet mask 63 support 44 Switch changing the password 28 positioning 13 restarting 41 switch defined 63 system tools 41 T TCP/IP 61 defined 63 technical specifications 53 traffic 63 troubleshooting...