Disabling Rapid EBGP Connection Reset

Context

Rapid EBGP connection reset is enabled by default. This allows BGP to immediately respond to a fault on an interface and delete the direct EBGP sessions on the interface without waiting for the hold timer to expire and implements rapid BGP network convergence.

If the status of an interface used to establish an EBGP connection changes frequently, the EBGP session will be deleted and reestablished repeatedly, causing network flapping. Rapid EBGP connection reset can be disabled in such a situation. BGP will delete direct EBGP sessions on the interface until the hold timer expires. This suppresses BGP network flapping and reduces network bandwidth consumption.

Procedure

Run system-view
The system view is displayed.
Run bgp { as-number-plain | as-number-dot }
The BGP view is displayed.
Run undo ebgp-interface-sensitive
Rapid EBGP connection reset is disabled.

By default, rapid EBGP connection reset is enabled.

Rapid EBGP connection reset enables BGP to quickly respond to interface faults but prevents BGP from quickly responding to interface recovery. After the interface recovers, BGP uses its state machine to restore relevant sessions.

Rapid EBGP connection reset is disabled in a situation where the status of an interface used to establish an EBGP connection changes frequently. If the status of the interface becomes stable, run the ebgp-interface-sensitive command to enable rapid EBGP connection reset to implement rapid BGP network convergence.