Dell PowerConnect B-RX BigIron RX Series Configuration Guide v02.8.00 - Page 898

26 Filtering If you make changes to filters or route maps and the neighbor does not support dynamic route refresh, use these methods to ensure that neighbors contain only the routes you want them to contain. • If you close a neighbor session, the device and the neighbor clear all the routes they learned from each other. When the device and neighbor establish a new BGP4 session, they exchange route tables again. Use this method if you want the device to relearn routes from the neighbor and resend its own route table to the neighbor. • If you use the soft-outbound option, the device compiles a list of all the routes it would normally send to the neighbor at the beginning of a session. However, before sending the updates, the device also applies the filters and route maps you have configured to the list of routes. If the filters or route maps result in changes to the list of routes, the device sends updates to advertise, change, or even withdraw routes on the neighbor as needed. This ensures that the neighbor receives only the routes you want it to contain. Even if the neighbor already contains a route learned from the device that you later decided to filter out, using the soft-outbound option removes that route from the neighbor. You can specify a single neighbor or a peer group. To close a neighbor session and thus flush all the routes exchanged by the device and the neighbor, enter the following command. BigIron RX# clear ip bgp neighbor all Syntax: clear ip bgp neighbor all | | | [soft-outbound | soft [in | out]] The all | | | specifies the neighbor. The parameter specifies a neighbor by its IP interface with the device. The specifies all neighbors in a specific peer group. The parameter specifies all neighbors within the specified AS. The all parameter specifies all neighbors. To resend routes to a neighbor without closing the neighbor session, enter a command such as the following. BigIron RX# clear ip bgp neighbor 10.0.0.1 soft out Clearing and resetting BGP4 routes in the IP route table To clear BGP4 routes from the IP route table and reset the routes, enter a command such as the following. BigIron RX# clear ip bgp routes Syntax: clear ip bgp routes [/] Clearing traffic counters You can clear the counters (reset them to 0) for BGP4 messages. To clear the BGP4 message counter for all neighbors, enter the following command. BigIron RX# clear ip bgp traffic Syntax: clear ip bgp traffic To clear the BGP4 message counter for a specific neighbor, enter a command such as the following. 822 BigIron RX Series Configuration Guide 53-1002253-01