
Configuring IP Services
8-26 117356-A Rev. A
Initiating a Peer-to-Peer Connection
A BGP speaker that wants to initiate peer-to-peer connections periodically issues
an open message.
BGP speakers respond to connection requests by returning open messages. In
F
igure 8-3, for example, BGP speaker A sends an open message to BGP speaker
B to request a connection; BGP speaker B responds by sending an open message
to BGP speaker A.
Figure 8-3. Establishing and Confirming a Connection between BGP
Peers
All BGP speakers respond to connection requests from other speakers.
By default, BGP attempts to initiate a connection on each interface configured for
peer-to-peer communications. If the attempt is unsuccessful, BGP retries every
120 seconds.
BGP
Speaker B
BGP
Speaker A
Open message A to B
Open message B to A
BGP
Speaker B
BGP
Speaker A
Keepalive message A to B
Keepalive message B to A
IP0022A
BGP
speaker B
BGP
speaker B
BGP
speaker A
BGP
speaker A
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