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BGP Configuration Guidelines

To configure the Border Gateway Protocol (BGP), you can include the following statements. Three portions of the bgp statement—those in which you configure global BGP, group-specific, and peer-specific options—contain many of the same statements. The following simplified version of the bgp statement omits these repeated statements to present a high-level, readable overview: 

protocols {

    bgp { 

        numerous global BGP statements

        group group-name { 

            peer-as autonomous-system;

            type type; 

            [network/mask-length ]; 

            numerous group-specific statements;

            neighbor address {

                numerous peer-specific statements;

            }

        } 

    }

}

For a list of hierarchy levels at which you can configure these statements, see the statement summary sections for these statements.

For a list of global BGP statements, see Defining BGP Global Properties. For a list of group-specific statements, see Defining Group Properties. For a list of peer-specific statements, see Defining Peer Properties.

NOTE: Changing configuration statements that affect BGP peerings, such as enabling or disabling remove-private or renaming a BGP group, resets the BGP sessions. Changes that affect BGP peerings should only be made when resetting a BGP session is acceptable.

Many of the global BGP, group-specific, and peer-specific statements are identical. For statements that you can configure at more than one level in the hierarchy, the more-specific statement overrides the less-specific statement. That is, a group-specific statement overrides a global BGP statement, and a peer-specific statement overrides a global BGP or group-specific statement.

By default, BGP is disabled.

This chapter describes the following tasks for configuring BGP:

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