300-510 · Question #231
300-510 Question #231: Real Exam Question with Answer & Explanation
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Question
Refer to the exhibit. The engineering team noticed route disruptions when DSL subscriber 172.16.20.10 goes offline. In this service provider environment: - The OSPF backbone area is configured to advertise loopback prefixes. - The PE routers are running BGP-IPv4 address family in a BGP-free core topology. - The DSL subscriber IP subnet 172.16.20.10/32 is redistributed in BGP on PE1. Which configuration on PE1 resolves the issue? A. B. C. D.
Options
- AR2#router bgp 200 address-family ipv4 unicast neighbor 12.12.12.2 remote-as 100 neighbor 12.12.12.2 activate neighbor 12.12.12.2 route-map PREPEND out exit-address-family ! route-map PREPEND permit 10 set as-path prepend 100 100
- BR2#router bgp 200 neighbor 12.12.12.2 remote-as 100 neighbor 23.23.23.2 remote-as 300 neighbor 12.12.12.2 filter-list 1 out ip as-path access-list 1 deny ^400$ ip as-path access-list 1 permit .*
- CR1#router bgp 100 neighbor 12.12.12.1 remote-as 200 neighbor 12.12.12.1 route-map SET-LOCAL-PREF in route-map SET-LOCAL-PREF permit 10 match ip address 2 set local-preference 700 route-map SET-LOCAL-PREF permit 20 access-list 2 permit 150.0.0.0 0.255.255.255 access-list 2 deny any
- DR2#router bgp 200 neighbor 12.12.12.2 route-map FLOODING out ip as-path access-list 1 permit ^400_ route-map FLOODING permit 10 match as-path 1 set metric 50000
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