Dell PowerConnect FCS624S Configuration Guide - Page 1084

30 Filtering Defining neighbor distribute lists A neighbor distribute list is a list of BGP4 address filters or ACLs that filter the traffic to or from a neighbor. To configure a neighbor distribute list, use either of the following methods. To configure a distribute list that uses ACL 1, enter a command such as the following. PowerConnect(config-bgp-router)#neighbor 10.10.10.1 distribute-list 1 in This command configures the Layer 3 Switch to use ACL 1 to select the routes that the Layer 3 Switch will accept from neighbor 10.10.10.1. Syntax: neighbor distribute-list in | out The parameter specifies the neighbor. The parameter specifies the name or number of a standard, extended, or named ACL. The in | out parameter specifies whether the distribute list applies to inbound or outbound routes: • in - controls the routes the Layer 3 Switch will accept from the neighbor. • out - controls the routes sent to the neighbor. NOTE The command syntax shown above is new. However, the neighbor distribute-list in | out command (where the direction is specified before the filter number) is the same as in earlier software releases. Use the new syntax when you are using an IP ACL with the distribute list. Use the old syntax when you are using a BGP4 address filter with the distribute list. Defining route maps A route map is a named set of match conditions and parameter settings that the router can use to modify route attributes and to control redistribution of the routes into other protocols. A route map consists of a sequence of up to 50 instances. If you think of a route map as a table, an instance is a row in that table. The router evaluates a route according to a route map instances in ascending numerical order. The route is first compared against instance 1, then against instance 2, and so on. As soon as a match is found, the router stops evaluating the route against the route map instances. Route maps can contain match statements and set statements. Each route map contains a "permit" or "deny" action for routes that match the match statements: • If the route map contains a permit action, a route that matches a match statement is permitted; otherwise, the route is denied. • If the route map contains a deny action, a route that matches a match statement is denied. • If a route does not match any match statements in the route map, the route is denied. This is the default action. To change the default action, configure the last match statement in the last instance of the route map to "permit any any". • If there is no match statement, the software considers the route to be a match. • For route maps that contain address filters, AS-path filters, or community filters, if the action specified by a filter conflicts with the action specified by the route map, the route map action takes precedence over the individual filter action. 1042 PowerConnect B-Series FCX Configuration Guide 53-1002266-01