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| 4.5 |  | Troubleshooting Frame Relay |
| 4.5.3 |  | The show frame-relay pvc command |

Use the show frame-relay pvc command to verify the PVC status and end-to-end connectivity of the routers. The three likely PVC status messages are:

- Active
- Inactive
- Deleted

Understanding the status of a PVC will quickly focus the troubleshooting effort.

A Frame-Relay PVC status of “active” indicates Frame-Relay end-to-end connectivity at Layer 2 and is associated with a working Frame-Relay circuit. If the status is “active” and problems are occurring, attention should be given to Layer 3 issues such as mapping IP addresses to DLCIs and telco DLCI allocations.

Note in Figure PVC 30 is “active”. This indicates end-to-end connectivity. PVC 21 is still inactive, which indicates a problem.

A PVC status of “inactive” suggests that the router recognizes the DLCI configured on its interface as being present on the Frame Relay switch, but the PVC associated with the DLCI is not capable of communication end-to-end. Usually this indicates that the router on the far side of the PVC is not configured correctly.

A Frame-Relay status of “deleted” indicates that the Frame-Relay switch is not reporting the DLCI configured on the serial interface. Suggested troubleshooting steps are:

- Check that the physical layer is up.
- Verify a working LMI with the show frame-relay lmi command.

If these steps indicate that the router is communicating successfully with the Frame-Relay switch, then the “deleted” status indicates that the Frame-Relay switch is not reporting the DLCI as being available. Therefore, the router interprets that the telco has “deleted” it. The most likely cause for this problem is a misconfigured DLCI on either the router or at the telco.