BGP CCIE-ENTERPRISE-INFRASTRUCTURE Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   Your company has two routers in AS 65001 connected via a point-to-point link. You need to establish an eBGP session between them and a service provider router in AS 65002. The service provider router is not directly connected; it is two hops away. You want to ensure the BGP session remains stable even if the direct link between your routers fails. What should you configure?

   • AUse loopback interfaces for the eBGP session and configure ebgp-multihop with a TTL of 2.
   • BUse loopback interfaces for the eBGP session and set the TTL to 1.
   • CConfigure a static route to the peer's loopback and use the physical interface for the session.
   • DUse physical interfaces for the eBGP session and rely on the default TTL of 1.
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   You are troubleshooting BGP convergence issues. You notice that BGP updates are taking a long time to propagate across your network. You want to reduce the time it takes for BGP to detect a peer failure. What should you adjust?

   • AIncrease the BGP keepalive and hold timers.
   • BDecrease the BGP keepalive and hold timers.
   • CDisable BGP fast external fallover.
   • DUse a longer route reflector cluster ID.
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   You have applied a new inbound route map to a BGP neighbor. You want to apply the new policy without clearing the BGP session. The neighbor supports route refresh. What should you do?

   • AUse 'clear ip bgp * in'
   • BUse 'clear ip bgp * soft in'
   • CUse 'clear ip bgp *'
   • DUse 'clear ip bgp * soft out'
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   You have two eBGP peers, ISP-A and ISP-B, both advertising the same prefix. You want to prefer ISP-A for outbound traffic. You have already set a higher local preference on routes from ISP-A. What else can you do to ensure ISP-A is preferred?

   • AUse a longer AS path for ISP-A.
   • BPrepend your AS to routes advertised to ISP-A.
   • CSet a higher MED on routes from ISP-A.
   • DSet a higher weight on routes from ISP-A.
   Reveal Solution Discussion Select an answer first
6. 5expert · hard

   Your network has two eBGP paths to the same external prefix. Path A has a local preference of 200, an AS path length of 3, and a MED of 50. Path B has a local preference of 150, an AS path length of 2, and a MED of 100. You want to ensure that Path A is always preferred, regardless of AS path length. You have already set the local preference on Path A to 200. What else must you do to guarantee Path A is preferred?

   • ASet a higher weight on Path A.
   • BUse a route map to set the next-hop to a loopback on Path A.
   • CPrepend AS numbers to Path B to make its AS path longer.
   • DSet a lower MED on Path A.
   Reveal Solution Discussion Select an answer first