Troubleshooting Frame Relay - H3C SR6600 Configuration Manual

[RouterB-Serial2/0/1.1] ip address 202.38.163.252 255.255.255.0
[RouterB-Serial2/0/1.1] fr dlci 100

Troubleshooting Frame Relay

Symptom 1:
The physical layer is in down status.
Solution:
Check whether the physical line is normal.
Check whether the remote router runs normally.
Symptom 2:
The physical layer is already up, but the link layer protocol is down.
Solution:
Ensure that both local router and remote router have been configured with the frame relay
encapsulation.
If two routers are directly connected, check that one end is configured as frame relay DTE interface
and the other end as frame relay DCE interface.
Ensure that the LMI protocol type configuration at both ends is the same.
If the above conditions are satisfied, use the debugging lmi command to enable the monitoring
function for the frame relay LMI messages to see whether one Status Request message
corresponds to one Status Response message. If not, it indicates the physical layer data is not
received/sent correctly. Check the physical layer.
Symptom 3:
The link layer protocol is up, but the remote router cannot be pinged.
Solution:
Ensure that the routers at both ends have configured (or created) correct address mapping for the
peer.
Ensure that there is a route to the peer if the routers are not in the same subnet segment.
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