Chapter 11. Troubleshooting IPv4 Routing Protocols

To troubleshoot a possible IPv4 routing protocol problem, first focus on interfaces, and then on neighbors. The routing protocol configuration identifies the interfaces on which the router should use the routing protocol. After identifying those interfaces, a network engineer can look at the neighbors each router finds on each interface, searching for neighbors that should exist but do not.

This chapter focuses on issues related to these two main branches of logic: on which interfaces should a router enable the routing protocol, and which neighbor relationships should each router create. This chapter relies on the configuration discussed in Chapter 8 for OSPFv2 and in Chapter 10 for EIGRP. This ...

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