Two OSPF routers are connected over a point-to-point link. One router is stuck in the EXSTART state. What is the most likely cause of this issue?
Answers
AMTU mismatch on the interfaces
BAuthentication failure
CHello timer mismatch
DSubnet mask mismatch
Correct answer: A — MTU mismatch on the interfaces
EXSTART is where the routers establish master/slave relation and MTU. If the MTU sizes do not match, the routers will be stuck in EXSTART/EXCHANGE.
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