BGP is the routing protocol of the Internet so any disruptions in links which cause the accessiblity of networks are propagated across huge numbers of routers. A flapping route is one that continually announces and rejects the available of a network. Since this can cause disruptions across an ISP or multiple ISPs, the following are ways that can minimize these effects.

To enable BGP route dampening, you must enter the address family configuration mode which is a configuration mode within the BGP routing process configuration mode:

Router(config)# router bgp as-number
Router(config-router)# address-family ipv4 [unicast | multicast | vrf vrf-name]
Router(config-router-af)# bgp dampening [half-life reuse suppress max-suppress-time] [route-map map-name]