12-6Defining an Extended Community ListYou can define multiple items for an extended community list that is identified by number. Duringmatching, the relation between items is logic OR, that is, if routing information matches one of theseitems, it passes the extended community list.Follow these steps to define an extended community list:To do… Use the command… RemarksEnter system view system-view —Define an extendedcommunity listip extcommunity-list ext-comm-list-number { deny| permit } { rt route-target }&<1-16>RequiredNot defined by defaultConfiguring a Route PolicyA route policy is used to filter routing information, and modify attributes of matching routing information.The match criteria of a route policy can be configured by referencing filters above mentioned.A route policy can comprise multiple nodes, and each route policy node contains:z if-match clauses: Define the match criteria that routing information must satisfy. The matchingobjects are some attributes of routing information.z apply clauses: Specify the actions to be taken on routing information that has satisfied the matchcriteria, such as route attribute modification.PrerequisitesBefore configuring this task, you need to configure:z Filtersz Routing protocolsYou also need to decide on:z Name of the route policy, and node numbersz Match criteriaz Attributes to be modifiedCreating a Route PolicyFollow these steps to create a route policy:To do… Use the command… RemarksEnter system view system-view —Create a route policy, specify anode for it and enter route policynode viewroute-policy route-policy-name { deny | permit }node node-number Required
