CCDE: Cisco Certified Design Expert (Written) — Question 35

You are deploying OSPF on a point-to-multipoint Frame Relay network. The remote sites do not need to be able to communicate with each other and there are a relatively small number of sites (scaling is not a concern).
How should you configure OSPF for this topology to minimize the additional routing information injected into the network and keep the configuration size and complexity to a minimum?

Answer options

• A. Configure the link at the hub router as OSPF point-to-multipoint and at the remote routers as OSPF point-to-point.
• B. Configure the link as OSPF broadcast and configure the hub router to always be the designated router.
• C. Configure the link as OSPF nonbroadcast and manually configure each of the remote sites as a neighbor.
• D. Configure the link as OSPF broadcast and configure a mesh group towards the remote routers.

Correct answer: B

Explanation

The correct answer is B because configuring the link as OSPF broadcast allows for simpler management and reduces complexity by automatically handling neighbor relationships. The other options either introduce unnecessary complexity or do not appropriately utilize OSPF's capabilities in a point-to-multipoint scenario.