M
any of the commands that are available to troubleshoot
serial and Frame Relay problems are similar. This chapter will first discuss topics
relating to troubleshooting serial lines as well as X.25 lines. After those
topics have been covered in detail, the
show
and
debug
commands relating to
Frame Relay will be discussed.
Troubleshooting summaries will be provided at the end of each section.
These summaries will be valuable as quick-reference guides when isolating
and diagnosing serial line and Frame Relay problems.
Troubleshooting Serial Lines
T
here are numerous commands available to aid in troubleshooting
serial lines. Some of them are
show
commands; others are
debug
commands.
Here is a list of the commands that will be covered in this section:
clear counters serial
show interface serial
show controllers serial
show buffers
debug serial interface
debug serial packet
An integral part of serial connections is the hardware involved. Look at
Figure 7.1. In this graphic, you see Router A connected to a channel service
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