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Configuring a BGP ConnectRetry Timer
Context
After BGP initiates a TCP connection, the ConnectRetry
timer will be stopped if the TCP connection is established successfully.
If the first attempt to establish a TCP connection fails, BGP tries
again to establish the TCP connection after the ConnectRetry timer
expires.
- Setting a short ConnectRetry interval reduces the period BGP waits between attempts to establish a TCP connection. This speeds up the establishment of the TCP connection.
- Setting a long ConnectRetry interval suppresses routing flapping caused by peer relationship flapping.
A ConnectRetry timer can be configured either for all peers or peer groups, or for a specific peer or peer group. A ConnectRetry timer configured for a specific peer takes precedence over that configured for the peer group of this peer. In addition, a ConnectRetry timer configured for a specific peer or peer group takes precedence over that configured for all peers or peer groups.