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Note: The figures in this chapter indicate a BGP session with a dotted line. A physical link is represented by a solid line. |
Unlike some other routing protocols, BGP speakers do not automatically discover each other and begin exchanging information. Instead, each BGP speaker must be explicitly configured with a set of BGP peers with which it exchanges routing information. BGP peers do not have to be directly connected to each other in order to share a BGP session. Another term for BGP peer is BGP neighbor. A BGP peer group consists of two or more BGP peers that share a common set of update policies.
In Figure 1, router NY and router Chicago are peers. Router NY and router LA are peers. Router NY and router Boston are peers. Router NY and router Philly are not peers. Router Chicago and router LA are not peers.
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Note: The figures in this chapter indicate a BGP session with a dotted line. A physical link is represented by a solid line. |
Figure 1: BGP Peers
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