web analytics

Cisco CCIP 642-661 Practice Exam (41-45)

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

How can you prevent multihomed customers with connections to two service providers from acting as a transit AS?
A. Enable BGP synchronization on all the customer routers
B. Use MED to influence the inbound traffic from the ISPs.
C. Use conditional advertisements when sending BGP updates to the ISPs.
D. Use an AS-path access-list to filter the BGP updates to the ISPs.
E. Use static routing to the ISPs.
Answer: D

ip tcp path-mtu-discovery age-timer infinite
What is the result of the command in the above?
A. sets the age time to zero
B. turns off the age timer
C. allows an infinite MTU size for the default age time of 10 minutes
D. sets the age time to its default maximum value of 30 minutes.
Answer: B

What is a key benefit of BGP dynamic update peer groups?
A. Newly configured BGP neighbors have peer group template configurations dynamically applied.
B. Dynamic update groups use iBGP neighbor information to automatically calculate route reflector cluster configurations.
C. Routing updates to the same destination are grouped to increase BGP efficiency.
D. Neighbors in a peer group are no longer required to share the same outbound routing policies.
E. BGP configurations are automatically optimized by routers which dynamically create BGP peer groups.
Answer: D

What is the correct command to set the BGP scanner interval to two minutes?
A. The maximum scanning interval cannot exceed one minute.
B. bgp scan-time 2
C. bgp scan-time 120
D. bgp scan-time 2 60
Answer: A