Troubleshooting frame relay
Symptom 1
The physical layer is in down status.
Solution
Check the following items:
Check the physical line.
Check that the remote device is working correctly.
Symptom 2
The physical layer is already up, but the link layer protocol is down.
Solution
Check the following items:
Frame relay is enabled on the peer devices.
If the two devices are directly connected, make sure one end is in DTE mode and the other end is in DCE mode.
Both ends are using the same LMI protocol.
If the problem persists, execute the debugging lmi command to determine whether one Status Response message is received for each Status Request message. If not, check the physical layer.
Symptom 3
The link layer protocol is up, but the remote party cannot be pinged.
Solution
Check the following items:
The devices at both ends have configured (or created) correct address mapping for the peer.
A route to the peer exists if the devices are not in the same subnet segment.