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

By Cisco · Question Mode

QuestionQ239

VPN Technologies

A DMVPN single-hub topology uses IPsec + mGRE with OSPF.

What must be configured on the hub to ensure that it becomes the designated router?

  • A route map to set the metrics of learned routes to 110
  • B tunnel interface of the hub with ip nhrp ospf dr
  • C OSPF priority to 0
  • D OSPF priority greater than 1
Explanation

On an OSPF broadcast DMVPN network, the router with the highest eligible interface priority becomes the designated router. Assigning the hub an OSPF priority greater than 1 ensures it wins over routers using the default priority of 1; spokes are normally assigned priority 0 to make them ineligible. Cisco’s DMVPN guidance specifies a hub priority greater than 1, such as ip ospf priority 2.

Learn more

Community Discussion

No comments yet. Be the first to start the discussion!