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
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.