Enterasys Networks X-PeditionTM manual Application of Community Attribute

Overview

learn, advertise, or redistribute routes. When routes are aggregated, the resulting aggregate has a COMMUNITIES attribute that contains all communities from all the initial routes.

Community lists form groups of communities for use in a route map’s match clause. Similar to ACLs, you can create a series of community lists where statements are checked until a match is found and when one statement is satisfied, the test is finished with the ip community-listcommunity-list-number {permit deny} community-numbercommand.

To configure the COMMUNITIES attribute and match clauses based on communities, refer to the match community-listand set community command descriptions in “BGP Community with Route Maps Examples” on page 6-26and the XSR CLI Reference Guide.

Although a COMMUNITIES attribute is not sent to a neighbor by default, you can specify the attribute be sent to the neighbor at an IP address with the neighbor {ip-address peer- group-name}send-communitycommand.

Figure 6-7 Application of Community Attribute

6-10 Configuring the Border Gateway Protocol