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CCNP Practical Studies: Troubleshooting by Donna L. Harrington

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Shooting Trouble with Frame Relay

In this section I want to reinforce the general things to look for when shooting Frame Relay troubles. Also I want to cover a little more detail on shooting trouble with running routing protocols over Frame Relay, and then discuss loopback testing.

The first question to ask yourself with Frame Relay is did it ever work. You are obviously going beyond your control that you had in the LAN to the service provider cloud. However, you must still continue your layered approach to troubleshooting. Although Frame Relay is a Layer 2 technology, it does not work across a broken physical link. If these lower layers are broken, you are wasting your time troubleshooting the upper layers.

The commands show ip interface brief, ...

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