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Routing TCP/IP, Volume I (CCIE Professional Development) by Jeff Doyle

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Troubleshooting Exercises

1: Figures 10.71 and 10.72 show the IS-IS neighbor tables of two routers, router A and router B, connected to a Token Ring network. IS-IS is exchanging routes between the two routers and entering them into the route tables, but no IP traffic is passing between the routers. What is wrong?
Figure 10.71. The IS-IS neighbor table of router A, Troubleshooting Exercise 1.

Figure 10.72. The IS-IS neighbor table of router B, Troubleshooting Exercise 1.

2: Figure 10.73 shows debug messages from a router that is not establishing ...

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