Summary of Troubleshooting Frame Relay WANs
The following summarizes the key points that were discussed in the previous sections:
?– There are three aspects of troubleshooting frame relay: troubleshooting the link,
troubleshooting the mapping from one router to another, and troubleshooting routing
across a Frame Relay network.
?– Use the show interface serial and show frame-relay lmi commands to verify Layer
1 and Layer 2 link failures. Use the show frame-relay map and show frame-relay pvc
commands to test connectivity between routers.
Chapter Summary
The following summarizes the key points that were discussed in this chapter:
?– Site-to-site VPNs secure traf?¬?c between intranet and extranet peers. Remote-access
VPNs secure communications from the telecommuter to the central of?¬?ce.
?– PPP can be con?¬?gured on both asynchronous and synchronous point-to-point links.
PPP supports both PAP and CHAP authentication.
?– Frame Relay interfaces can be either point-to-point or multipoint interfaces.
?– To troubleshoot Frame Relay connections, use the show frame relay lmi, show frame
relay pvc, and show frame relay map commands.
You have a variety of ways to interconnect users to remote services, and each has its bene?¬?ts
and drawbacks.
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