EIGRP CCIE-ENTERPRISE-INFRASTRUCTURE Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   An engineer is designing a large EIGRP network with hundreds of routers. The engineer is concerned about the impact of a route flap on the entire network. Which technique is most effective in limiting the scope of EIGRP queries?

   • AImplement route summarization at strategic points.
   • BDisable EIGRP on all interfaces except the core.
   • CIncrease the hold timer on all routers.
   • DUse the maximum-paths command to increase the number of paths.
   Reveal Solution Discussion Select an answer first
2. 22application · medium

   A network engineer is troubleshooting an EIGRP adjacency that keeps flapping between two routers connected over a WAN link with high latency. The hello timer is set to 5 seconds and the hold timer to 15 seconds. The engineer wants to maintain the adjacency while reducing unnecessary hello traffic. What should the engineer do?

   • AIncrease the hello timer to 15 seconds and the hold timer to 45 seconds on both routers.
   • BDisable the hello timer and rely on the hold timer only.
   • CIncrease only the hold timer to 60 seconds on both routers.
   • DDecrease the hello timer to 1 second and the hold timer to 3 seconds.
   Reveal Solution Discussion Select an answer first
4. 23application · medium

   A large enterprise network is expanding and the EIGRP domain is growing. The engineer is concerned about the impact of query propagation on convergence and router CPU usage. Which strategy will best mitigate the scalability issues?

   • AUse a single EIGRP domain without summarization to keep the topology simple.
   • BImplement route summarization and stub routers at the network edges.
   • CIncrease the K-values to make the metric more sensitive.
   • DDisable EIGRP on all but the core routers.
   Reveal Solution Discussion Select an answer first
5. 24expert · hard

   A network has three routers: R1, R2, and R3. R1 is connected to R2 and R3. R2 and R3 are also connected to each other. The route to 10.1.1.0/24 is learned via R2 (successor, FD=100, RD=80) and via R3 (RD=90). The feasibility condition is met for R3. Suddenly, R2 goes down. R1 immediately promotes R3 as the new successor. However, a few seconds later, R1 receives a query from R3 for the same route. What is the most likely reason for this query?

   • AR3 is verifying that R1 still has a route to the destination before updating its topology table.
   • BR3 received an update from R1 about the new successor and is acknowledging it.
   • CR1's promotion of R3 caused a routing loop, so R3 is querying to break the loop.
   • DR3 lost its own route to 10.1.1.0/24 and is now in active state, querying its neighbors.
   Reveal Solution Discussion Select an answer first
6. 25expert · hard

   A network engineer is designing an EIGRP network with multiple sites. The engineer wants to ensure that a failure of a specific subnet at one site does not cause queries to be sent to the entire network. The engineer has configured manual summarization at the site's border router. What is the effect of this summarization on query propagation?

   • AQueries will be sent only to the routers that have the specific subnet in their routing table.
   • BQueries will be suppressed entirely for the summarized route.
   • CQueries will still be sent to all routers because summarization does not affect query propagation.
   • DQueries for the specific subnet will be sent only to the border router, not beyond the summary boundary.
   Reveal Solution Discussion Select an answer first