Hi again, while we're at it, perhaps the IOS-instructions in ripe-178 should be changed to use prefix-lists instead. It's somewhat more intuitive. Kind regards, -- Fredrik Rosenbecker IP-Only AB -- Example configuration below -- router bgp 65500 bgp dampening route-map FLAP ! ip prefix-list max23 description Control dampening of /23 and shorter prefixes. ip prefix-list max23 seq 5 permit 0.0.0.0/0 le 23 ! ip prefix-list min24 description Control dampening of /24 and longer prefixes. ip prefix-list min24 seq 5 permit 0.0.0.0/24 le 32 ! ip prefix-list rootns description Root-nameserver networks. ip prefix-list rootns seq 5 permit 198.41.0.0/24 ip prefix-list rootns seq 10 permit 128.9.0.0/16 ip prefix-list rootns seq 15 permit 192.33.4.0/24 ip prefix-list rootns seq 20 permit 128.8.0.0/16 ip prefix-list rootns seq 25 permit 192.203.230.0/24 ip prefix-list rootns seq 30 permit 192.5.4.0/23 ip prefix-list rootns seq 35 permit 192.112.36.0/24 ip prefix-list rootns seq 40 permit 128.63.0.0/16 ip prefix-list rootns seq 45 permit 192.36.148.0/24 ip prefix-list rootns seq 50 permit 193.0.14.0/24 ip prefix-list rootns seq 55 permit 198.32.64.0/24 ip prefix-list rootns seq 60 permit 202.12.27.0/24 ! route-map FLAP deny 10 match ip address prefix-list rootns ! route-map FLAP permit 20 match ip address prefix-list min24 set dampening 30 750 3000 60 ! route-map FLAP permit 30 match ip address prefix-list max23 set dampening 15 750 3000 45 ! route-map FLAP permit 40 set dampening 10 1500 3000 30 !