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?
To capture BGP next-hop flows, the network engineer must configure the router to use NetFlow version 9, as it supports more advanced export features compared to version 5. The required commands include enabling CEF (Cisco Express Forwarding) and specifying the NetFlow version and destination. Additionally, applying the configuration on the ingress interface will allow for the monitoring of incoming traffic patterns, which is crucial for observing BGP next-hop information. Therefore, the correct configuration is: 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.
Its B https://www.cisco.com/en/US/docs/ios-xml/ios/netflow/configuration/15-2s/cfg-nf-bgp-next-hop.html#GUID-631A9343-04F7-47AB-994D-DE22FB22F048
Configure NetFlow v9 (Version 9) data export (if only Version 5 is configured, then BGP next hop data is visible in the caches, but is not exported)
R1(config)#ip flow-export version 9 bgp-nexthop *Jul 18 00:42:58.933: %PARSER-5-HIDDEN: Warning!!! ' ip flow-export version 9 bgp-nexthop ' is a hidden command. Use of this command is not recommended/supported and will be removed in future.