Policy Control in BGP Using Prefix Lists
Distribute lists, prefix lists, and route maps are BGP advertisement control mechanisms that can be used to normalize the propagation of BGP advertisements throughout the internetwork. They all function in much the same way as access lists in that they can be tweaked to regulate how data is sent through the network. Distribute lists use access lists to decide what routing information will be filtered to govern whether a certain router will send or receive BGP route advertisements with a particular peer. You basically configure a distribute list to permit or deny a router to send or receive BGP advertisements with the distribute-list in or the distribute-list out commands. In addition to update traffic ...
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