Open a Peer Connection Passively

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; 

You can configure passive connections globally for all BGP groups (at the [edit protocols bgp] hierarchy level), for all peers in a group (at the [edit protocols bgp group group-name] level), or for an individual peer (at the [edit protocols bgp group group-name neighbor address] level). For routing instances, include the statement at the [edit routing-instances routing-instance-name protocols bgp) hierarchy level, [edit routing-instances routing-instance-name protocols bgp group group-name) hierarchy level, and the [edit routing-instances routing-instance-name protocols bgp group group-name neighbor address] hierarchy level.