400-007: Cisco Certified Design ExpertDemo

By Cisco · Question Mode

QuestionQ307

Network Design

Company XYZ runs OSPF in its network and has merged with another company that uses EIGRP as its routing protocol. Company XYZ now requires the two domains to communicate redundantly while preserving a loop-free environment. The solution must scale as new networks are added in the near future. Which technology can meet these requirements?

  • A single point route-redistribution with route filtering using route tags
  • B multipoint route-redistribution with route filtering using ACLs
  • C multipoint route-redistribution with route filtering using route tags
  • D single point route-redistribution with route filtering using ACLs
Explanation

Multiple redistribution points provide redundant connectivity between the OSPF and EIGRP domains. Route tagging marks routes as they cross a redistribution boundary, allowing route maps at every redistribution point to reject routes returning to their source protocol and thereby prevent redistribution loops. This origin-based filtering scales as prefixes are added, unlike maintaining ACL entries for each network.

Learn more

Community Discussion

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