Scenario 6-4: BGP with Communities and Peer Groups

BGP deals with large BGP peers by using many different scalable solutions, such as the community attribute and peer groups. In this scenario, you discover how BGP uses the community attribute along with a peer group to ensure that IBGP is scalable in a large network environment. A community is a group of routers sharing the same property. A peer group is a group of BGP neighbors sharing the same update policies.

In this scenario, you configure a well-known BGP community and discover the advantages of peer groups.


The community attribute is a number defined in the range 1 to 4,294,967,200. The IOS set community community-number [additive] command is used to define a value. Some well-known ...

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