Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 197
A network engineer is implementing NetFlow to observe traffic patterns on the network. The engineer is planning to review the patterns to help plan future strategies for monitoring and preventing congestion as the network grows. If the captures must include BGP next-hop flows, which configuration must the engineer apply to the router?
Answer options
- A. ip cef ip flow-export version 5 bgp-nexthop ip flow-export destination 192.168.1.1 9995 interface gigabitethernet 1/0/1 ip flow egress
- B. ip cef ip flow-export version 9 bgp-nexthop ip flow-export destination 192.168.1.1 9996 interface gigabitethernet 1/0/1 ip flow ingress
- C. ip cef ip flow-export version 5 ip flow-export destination 192.168.1.1 9995 interface gigabitethernet 1/0/1 ip flow ingress cdp enable
- D. no ip cef ip flow-export version 9 ip flow-export destination 192.168.1.1 9996 interface gigabitethernet 1/0/1 ip flow ingress ip flow egress
Correct answer: B
Explanation
The correct answer is B because it specifies 'bgp-nexthop' and uses version 9 of the flow export, which is necessary for including the BGP next-hop information. Option A uses the wrong version (5) and does not include next-hop information. Option C also lacks the 'bgp-nexthop' and uses the wrong version, while option D incorrectly states 'no ip cef' which disables CEF, making it incorrect for this scenario.