300-410 ENARSI: Implementing Cisco Enterprise Advanced Routing and ServicesDemo

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QuestionQ14

Layer 3 Technologies

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Refer to the exhibit. A network administrator uses the DNA Assurance Dashboard panel to troubleshoot a failed OSPF adjacency between Edge_NYC interface GigabitEthernet1/3 and neighbor Edge_SNJ. The administrator sees that the neighborship is stuck in the exstart state.

How should the administrator resolve this issue?

  • A Configure to match the OSPF interface network types on both routers.
  • B Configure to match the OSPF interface speed and duplex settings on both routers.
  • C Configure to match the OSPF interface MTU settings on both routers.
  • D Configure to match the OSPF interface unique IP address and subnet mask on both routers.
Explanation

An OSPF neighbor that remains in ExStart cannot complete Database Description packet exchange. A mismatch between the interfaces’ MTU settings causes the router receiving a Database Description packet with an unacceptable advertised MTU to ignore it, so the adjacency does not progress. The interface MTUs must match.

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