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CCNP Practical Studies: Troubleshooting by Donna L. Harrington

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Trouble Ticket Solutions

These solutions are not always the only way to perform these tasks. Compare your results.

Trouble Ticket 1 Solution

Turn on the debug bri command in Example 9-51 to watch the TEI negotiation.

Example 9-51. TEI Negotiation
r5#debug bri
Basic Rate network interface debugging is on
r5#!!!unplug the cable
Dec 23 06:51:14.784: BRI: write_sid: scp = 0, wrote = E
Dec 23 06:51:14.792: BRI: write_sid: scp = 0, wrote = E
Dec 23 06:51:14.792: BRI: write_sid: scp = 0, wrote = E
Dec 23 06:51:25.404: BRI: write_sid: scp = 0, wrote = 92
Dec 23 06:51:25.404: BRI: write_sid: scp = 90, wrote = 93
Dec 23 06:51:25.408: BRI0: ACTIVATED, state F2, event DI
							Dec 23 06:51:25.408: BRI: T4 timer started DEACT timer expired Dec 23 06:51:26.012: ...

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