BigIron RX Series Configuration Guide 80153-1001986-01Filtering 26• The cooperative filtering configuration on the device.• The ORFs received from neighbors.To display the cooperative filtering configuration on the device, enter a command such as thefollowing. The line shown in bold type shows the cooperative filtering status.Syntax: show ip bgp neighbor To display the ORFs received from a neighbor, enter a command such as the following.Syntax: show ip bgp neighbor received prefix-filterConfiguring route flap dampeningA “route flap” is the change in a route’s state, from up to down or down to up. When a route’s statechanges, the state change causes changes in the route tables of the routers that support the route.Frequent changes in a route’s state can cause Internet instability and add processing overhead tothe routers that support the route.Route flap dampening is a mechanism that reduces the impact of route flap by changing a BGP4router’s response to route state changes. When route flap dampening is configured, the devicesuppresses unstable routes until the route’s state changes reduce enough to meet an acceptabledegree of stability. The Brocade implementation of route flap dampening is based on RFC 2439.Route flap dampening is disabled by default. You can enable the feature globally or on anindividual route basis using route maps.BigIron RX# show ip bgp neighbor 10.10.10.11 IP Address: 10.10.10.1, AS: 65200 (IBGP), RouterID: 10.10.10.1State: ESTABLISHED, Time: 0h0m7s, KeepAliveTime: 60, HoldTime: 180RefreshCapability: ReceivedCooperativeFilteringCapability: ReceivedMessages: Open Update KeepAlive Notification Refresh-ReqSent : 1 0 1 0 1Received: 1 0 1 0 1Last Update Time: NLRI Withdraw NLRI WithdrawTx: --- --- Rx: --- ---Last Connection Reset Reason:UnknownNotification Sent: UnspecifiedNotification Received: UnspecifiedTCP Connection state: ESTABLISHEDByte Sent: 110, Received: 110Local host: 10.10.10.2, Local Port: 8138Remote host: 10.10.10.1, Remote Port: 179ISentSeq: 460 SendNext: 571 TotUnAck: 0TotSent: 111 ReTrans: 0 UnAckSeq: 571IRcvSeq: 7349 RcvNext: 7460 SendWnd: 16384TotalRcv: 111 DupliRcv: 0 RcvWnd: 16384SendQue: 0 RcvQue: 0 CngstWnd: 5325BigIron RX# show ip bgp neighbor 10.10.10.1 received prefix-filterip prefix-list 10.10.10.1: 4 entriesseq 5 permit 10.10.0.0/16 ge 18 le 28seq 10 permit 20.20.10.0/24seq 15 permit 30.0.0.0/8 le 32seq 20 permit 40.10.0.0/16 ge 18
