You can configure a router not to send Open requests to a peer. Once you configure the router to be passive, the router does not originate the TCP connection. However, when the router receives a connection from the peer and an Open message, it replies with another BGP Open message. Each router declares its own capabilities.
To configure the router so that it does not send Open requests to a peer, include the passive statement:
-
passive;
For a list of hierarchy levels at which you can configure this statement, see the statement summary section for this statement.