BGP CCIE-ENTERPRISE-INFRASTRUCTURE Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   You are configuring an iBGP session between two routers in the same AS. Both routers have loopback interfaces. You want to ensure the session uses the loopback interfaces for stability. What must you configure on both routers?

   • Aneighbor <ip> password <password>
   • Bneighbor <ip> ebgp-multihop 2
   • Cneighbor <ip> update-source loopback0
   • Dneighbor <ip> next-hop-self
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   You have two BGP paths to the same destination. Path 1 has a local preference of 100 and a MED of 50. Path 2 has a local preference of 100 and a MED of 100. Both paths have the same AS path length. Which path will be preferred?

   • APath 1, because it has a lower MED.
   • BBoth paths are equally preferred.
   • CPath 2, because it has a higher MED.
   • DThe path with the higher local preference is preferred.
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   You need to filter BGP routes from a neighbor based on the AS path. You want to permit only routes that originate from AS 65001 and deny all others. What should you use?

   • AA community list with a regular expression.
   • BAn AS path access list with a regular expression.
   • CA prefix list with an AS path regular expression.
   • DA route map with a next-hop match.
   Reveal Solution Discussion Select an answer first
5. 19application · medium

   A service provider is connecting a new customer edge router to their PE router. The customer requires eBGP peering over a direct link, but the PE router's interface IP is not reachable from the customer's loopback. The customer wants to use loopback addresses for the BGP session to improve stability. The PE router is configured with the neighbor's loopback IP and the customer's router has a static route to the PE's loopback. What additional configuration is required on the PE router to establish the eBGP session?

   • ASet the next-hop-self on the neighbor statement
   • BChange the BGP neighbor to use the directly connected interface IP
   • CUse the update-source loopback0 command on the neighbor
   • DConfigure ebgp-multihop 2 on the neighbor statement
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A large ISP network uses BGP route reflectors to reduce IBGP sessions. The network team notices that some routes are not being reflected to all clients. They suspect the route reflector is not configured correctly. Which configuration is essential for the route reflector to reflect routes to a client?

   • AThe client must be configured as a route-reflector-client on the route reflector
   • BThe client must be in a different AS
   • CThe client must have a full mesh with other clients
   • DThe route reflector must have ebgp-multihop configured
   Reveal Solution Discussion Select an answer first