Troubleshooting

If the physical status is Down, perform the following operations:

1. Run the display this command on both the local and remote interfaces to check whether they have been shut down. If either one of them or both of them have been shut down, run the undo shutdown command in the interface view. After that, run the display this interface command to check whether the interfaces have gone Up.

2. At this step, Ethernet interfaces and non-Ethernet interfaces are handled differently.

   • If Ethernet interfaces are used for connection, check that the rate and duplex mode have been configured on the peer device. Then, set the same rate and duplex mode on the local interface as that on the peer device. After that, run the display this interface command to check whether the interface status is Up.

     The available commands are as follows:

     • Run the duplex { full | half | auto } command to configure the half-duplex mode on an Ethernet interface.
     • Run the speed { 100 | 1000 | auto } command to configure the rate on an Ethernet interface.

   • If non-Ethernet interfaces are used for connection, skip this step.

3. At this step, optical interfaces and electrical interfaces are handled differently.

   • If optical interfaces are used for connection, check whether the optical modules on the interfaces of the local and peer ends are matched in terms of wavelengths, optical power, and other elements. If they are not matched, replace optical modules. Then, run the display this interface command to check whether the interface status is Up.

     
     

   • If electrical interfaces are used for connection, skip this step.

4. Replace the network cable or fiber, and then run the display this interface command to check whether the interface status is Up.

5. Contact technical support personnel.

good doc

good doc

good troubleshooting

Thanks. It was useful.

good

useful document, thanks