Configuring Loopback Detection
Context
Performing loopback detection affects system performance. After loopback detection is performed, run the undo loopback command immediately to disable loopback detection.
Procedure
- Run system-view
The system view is displayed.
- Run controller e1 interface-number
The specified CE1/PRI interface view is displayed.
- Run loopback { local | payload | remote }
The loopback detection function is enabled and the detection mode is configured.
Follow-up Procedure
Perform either of the following steps depending on the detection mode you configured:
If the loopback detection mode is set to local, run the display interface serial interface-number command on the local device to check whether the physical status (current state) of the serial interface is Up.
If the serial interface is in Up state, the local device can send and receive packets normally. If the serial interface is not in Up state, the local device fails to send and receive packets.
If the loopback detection mode is set to remote, run the display interface serial interface-number command on the remote device to check whether the physical status (current state) of the serial interface is Up.
If the serial interface is in Up state, the link between the local and remote devices is working properly. If the serial interface is not in Up state, the link between the local and remote device fails.