How to Test the Cisco GBIC

 

 

資料來源: http://www.sopto.com/brands_brands_1/cisco-compatible-transceiver.shtml

 

 

 

How to Test the Cisco GBIC? A Gigabit Interface converter (GBIC) is a modular device that can be inserted into a switch or router in order to connect other networking devices or uplinks. The GBIC slot is versatile, because you can purchase GBICs with a wide variety of different connection types.

1, Type “show interface status” from the privileged mode of the Cisco device. Verify you are in privileged mode by looking at the command line prompt. A “#” at the end, such as “Switchname#”, indicates privileged mode, a “>” at the end, such as “Switchname>”, indicates Exec mode. Type “enable” to move from the Exec mode to privileged mode.

 

2,Look for the line associated with the interface number of the GBIC slot you are troubleshooting. The last column, “Type,” indicates what type of GBIC is in the GBIC slot. If “Type” says “No GBIC,” then the Cisco device does not recognize the GBIC. This could indicate faulty hardware or a poor connection.

 

3, Remove the GBIC, check for foreign objects in the GBIC slot, firmly replace the GBIC into the slot and check it again.

 

4, Replace the GBIC and check it again. If the new GBIC works, the old GBIC is faulty and needs to be replaced, or it is a GBIC that is not compatible with this switch. Non-Cisco GBICs will not always work in Cisco switches, and are not recommended by Cisco.

 

5, Place the GBIC into another GBIC slot and check it again, this time looking at the line for the new interface. If the GBIC works in a different GBIC slot, the original GBIC slot is likely to be faulty and the switch itself may be defective.

 

6, Verify the GBIC is transmitting a signal by connecting a patch cable to it and plugging the other end into another switch. From the other switch, establish a terminal console and run the command “show interface status.” Verify the “Status” column indicates a “connected” state. If both switches show a “connected” status for the link used with your GBIC, the GBIC is transmitting and receiving data.

 

7, Verify the fault does not lie with the patch cable or cables used between the two switches by connecting the patch cables to a known good GBIC or by replacing the patch cables with known good cables.