Establish a neighbor between BGP

The establishment of a neighbor Idle-BGP process between BGP is started or reset. This status is waiting for the start. For example, if a BGP peer is specified, another event is initialized when a TCP connection request is received, when a vro or peer is reset, it will return to the idle status. Www.2cto.com Connect-it is detected that a peer is trying to establish a TCP connection. Active-try to establish a TCP connection with the peer. If a fault occurs, the OpenSent-TCP connection in idle status is established. BGP sends an OPEN message to the peer and switches to the OpenSent status, if it fails, it is switched to the Active state. OpenReceive-receives the OPEN message from the peer and waits for the keepalive message. If keepalive is received, it is switched to the Established status. If notification is received, it is returned to the idle status, for example, error or configuration change, send a notification and return to the idle status. Www.2cto.com Established-keepalive is received from the peer and data exchange starts. After keepalive is received, the hold timer will be reset. If notification is received, it will return to the idle status.