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| 4.5 |  | Troubleshooting Frame Relay |
| 4.5.1 |  | Steps for troubleshooting Frame Relay |

When Frame Relay is properly provisioned by the service provider, the installation of a Frame Relay network using Cisco routers is usually a trouble-free task involving minimal configuration. However, if problems arise in the Frame Relay network proven techniques can be applied to isolate and solve them. Troubleshooting Frame Relay network issues can be broken down into four easy steps:

1. Verify the physical connection between the CSU/DSU and the router.
2. Verify that the router and Frame Relay provider are properly exchanging LMI information.
3. Verify that the PVC status is active.
4. Verify that the Frame Relay encapsulation matches on both routers.

There are numerous diagnostic tools available for these tasks. However, most Frame Relay problems can be diagnosed by using the following simple commands:

- show interfaces
- show frame-relay lmi
- show frame-relay pvc
- show frame-relay map
- debug frame-relay lmi
- debug frame-relay events
- debug frame-relay packet