Content

| 4.5 |  | Troubleshooting Frame Relay |
| 4.5.4 |  | Frame Relay encapsulation type |

If none of the previous steps have solved the Frame Relay issue, the problem may be related to Frame Relay encapsulation. Cisco routers default to cisco Frame Relay encapsulation, which is valid only between other Cisco routers that are using cisco Frame Relay encapsulation. If connecting to a third-party router, the Frame Relay encapsulation must be changed from cisco to ietf. To configure ietf Frame Relay encapsulation, replace the encapsulation frame-relay command with encapsulation frame-relay ietf.