642-661 Exam

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Exam : Cisco 642-661
Title : CCIP Configuring BGP on Cisco Routers (BGP)


1. Based on the physical topology of AS 50001, to reduce the IBGP full-mesh requirements, only two redundant route reflectors (RR) will be used in a single cluster. In this case, which two routers should be the RRs and which three routers should be the clients based on the recommended route reflector design rule?
Task: 1) Drag the matching text labels given on the left side of the topology to the correct targets on the right to identify these routers.
2) Also, identify all the unnecessary IBGP sessions once the redundant RRs have been configured by clicking on the IBGP session links to disable them. You can re-enable the IBGP sessions link by clicking on it again.
Answer:

2. What are two purposes of the BGP scan-time command? (Choose two.)
A. to tune the BGP process which walks the BGP table and confirms the reachability of next hops
B. to allow faster detection of downed BGP peers
C. to improve BGP convergence time
D. to tune the BGP update interval
E. to decrease the effects of unstable routes by increasing the route suppression time
Answer: A, C

3. List the BGP route selection steps in the correct order
Answer:

4. Lab
Answer: Sorry, see the next version!

5. Which command is used to configure the external, confederation-wide AS number?
A. Router(config)#router bgp {as-number}
B. Router(config-router)#bgp confederation peers {as-number}
C. Router(config-router)#bgp confederation identifier{as-number}
D. Router(config-router)#bgp cluster-id{as-number}
E. Router(config-router)#neighbor {ip address} remote-as {as-number}
Answer: C

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