The addition of
concepts such as nonbroadcast multiaccess (NBMA), Local Management Interface (LMI),
Inverse Address Resolution Protocol (ARP), and Frame Relay maps requires that an
administrator have a fundamental knowledge of these concepts to better troubleshoot
connectivity issues that can arise.
Components of Troubleshooting Frame Relay
Troubleshooting Frame Relay requires a step-by-step approach that identi?¬?es and tests each
of the major components. Figure 8-31 outlines this approach in a ?¬‚owchart.
The major components of Frame Relay troubleshooting are described as follows:
?– Troubleshooting a Frame Relay link that is down, which could be a Layer 1 or
Layer 2 issue
?– Troubleshooting Frame Relay remote router connectivity, which is the connectivity
between the Frame Relay peer routers
348 Chapter 8: Extending the Network into the WAN
?– Troubleshooting Frame Relay end-to-end connectivity, which is the connectivity
between workstations across a Frame Relay network
Figure 8-31 Flowchart for Troubleshooting Frame Relay
Troubleshooting Frame Relay Connectivity Issues
The ?¬?rst step in troubleshooting Frame Relay connectivity issues is to check the status of
the Frame Relay interface.
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