Which action should be taken to resolve this issue?

An engineer needs dynamic routing between two routers and is unable to establish OSPF adjacency.

The output of the show ip ospf neighbor command shows that the neighbor state is EXSTART/EXCHANGE.

Which action should be taken to resolve this issue?
A . match the passwords
B . match the hello timers
C . match the MTUs
D . match the network types

View Answer

Answer: C

Explanation:

Neighbors Stuck in Exstart/Exchange State

The problem occurs most frequently when attempting to run OSPF between a Cisco router and another vendor’s router. The problem occurs when the maximum transmission unit (MTU) settings for neighboring router interfaces don’t match. If the router with the higher MTU sends a packet larger that the MTU set on the neighboring router, the neighboring router ignores the packet.