Example 10-87 and Example 10-88 show the IS-IS neighbor tables of two routers, router A and router B, connected to via a serial interface. What is wrong?
Example 10-87. The IS-IS neighbor table of router A, Troubleshooting Exercise 1.
Router_A#show clns is-neighbors detail System Id Interface State Type Priority Circuit Id Format 0000.00EF.DCBA To0 Up L1L2 64/64 0000.00EF.DCBA.04 Phase V Area Address(es): 01 IP Address(es): 192.168.11.2 Uptime: 0:09:25 0000.00EF.5678 Se0.17 Up IS 0 /0 00 Phase V Area Address(es): 01 IP Address(es): 192.168.5.9 Uptime: 1:28:22 0000.00EF.9ABC Se0.18 Up L1L2 0 /0 07 Phase V Area Address(es): 01 IP Address(es): 192.168.5.13 Uptime: 1:29:45 0000.00EF.1234 Se0.16 Up L1L2 0 /0 06 Phase V Area Address(es): 01 IP Address(es): 192.168.5.5 Uptime: 1:29:45 Router_A#
Example 10-88. The IS-IS neighbor table of router B, Troubleshooting Exercise 1.
Router_B#show clns is-neighbors detail System Id Interface State Type Priority Circuit Id Format 0000.00EF.DEF1 Se0.17 Up IS 0 /0 00 Phase V Area Address(es): 01 IP Address(es): 10.1.1.1 Uptime: 0:11:06 Router_B#
2
Example 10-89 shows debug messages from a router that is not establishing an adjacency with a neighbor on its interface TO0. What is wrong?
Example 10-89. The debug output for Troubleshooting Exercise 2.
Router_B#debug isis adj-packets IS-IS Adjacency related packets debugging is on Router_B# ISIS-Adj: Sending L1 IIH on TokenRing0 ISIS-Adj: Sending L1 IIH on TokenRing1 ISIS-Adj: Sending L1 IIH on TokenRing0 ISIS-Adj: Sending L1 IIH on TokenRing1 ISIS-Adj: Sending L1 IIH on TokenRing0 ISIS-Adj: Sending L1 IIH on TokenRing1 ISIS-Adj: Rec L2 IIH from 0000.3090.c7df (TokenRing0), cir type 2, cir id 0000.0 0EF.DCBA.04 ISIS-Adj: is-type mismatch ISIS-Adj: Sending L1 IIH on TokenRing0 ISIS-Adj: Sending L1 IIH on TokenRing1 ISIS-Adj: Sending L1 IIH on TokenRing0 ISIS-Adj: Sending L1 IIH on TokenRing1 ISIS-Adj: Sending L1 IIH on TokenRing1 ISIS-Adj: Sending L1 IIH on TokenRing0 ISIS-Adj: Rec L2 IIH from 0000.3090.c7df (TokenRing0), cir type 2, cir id 0000.0 0EF.DCBA.04 ISIS-Adj: is-type mismatch ISIS-Adj: Sending L1 IIH on TokenRing1 ISIS-Adj: Sending L1 IIH on TokenRing0 ISIS-Adj: Sending L1 IIH on TokenRing1 ISIS-Adj: Sending L1 IIH on TokenRing0 IIH on TokenRing0L1 IIH on TokenRing1
