Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 126)

98 Multi-Service IronWare Routing Configuration Guide
53-1003033-02
Filtering
Displaying cooperative filtering information
You can display the following cooperative filtering information:
• 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 the
following. The line shown in bold type shows the cooperative filtering status.
Brocade# show ip bgp neighbor 10.10.10.1
1 IP Address: 10.10.10.1, AS: 65200 (IBGP), RouterID: 10.10.10.1
State: ESTABLISHED, Time: 0h0m7s, KeepAliveTime: 60, HoldTime: 180
RefreshCapability: Received
CooperativeFilteringCapability: Received
Messages: Open Update KeepAlive Notification Refresh-Req
Sent : 1 0 1 0 1
Received: 1 0 1 0 1
Last Update Time: NLRI Withdraw NLRI Withdraw
Tx: --- --- Rx: --- ---
Last Connection Reset Reason:Unknown
Notification Sent: Unspecified
Notification Received: Unspecified
TCP Connection state: ESTABLISHED
Byte Sent: 110, Received: 110
Local host: 10.10.10.2, Local Port: 8138
Remote host: 10.10.10.1, Remote Port: 179
ISentSeq: 460 SendNext: 571 TotUnAck: 0
TotSent: 111 ReTrans: 0 UnAckSeq: 571
IRcvSeq: 7349 RcvNext: 7460 SendWnd: 16384
TotalRcv: 111 DupliRcv: 0 RcvWnd: 16384
SendQue: 0 RcvQue: 0 CngstWnd: 5325
Syntax: show ip bgp neighbor ip-addr
To display the ORFs received from a neighbor, enter a command such as the following:
Brocade# show ip bgp neighbor 10.10.10.1 received prefix-filter
ip prefix-list 10.10.10.1: 4 entries
seq 5 permit 10.10.0.0/16 ge 18 le 28
seq 10 permit 10.20.10.0/24
seq 15 permit 10.0.0.0/8 le 32
seq 20 permit 10.10.0.0/16 ge 18
Syntax: show ip bgp neighbor ip-addr received prefix-filter
Configuring route flap dampening
A route flap is a change in the state of a route, from up to down or down to up. A route state change
causes changes in the route tables of the devices that support the route. Frequent route state
changes can cause Internet instability and add processing overhead to the devices that support
the route.
Route flap dampening helps reduce the impact of route flap by changing the way a BGP4 device
responds to route state changes. When route flap dampening is configured, the device suppresses
unstable routes until the number of route state changes drops enough to meet an acceptable
degree of stability. The Brocade implementation of route flap dampening is based on RFC 2439.