Does BGP session need to re-establish after HA Failover?

Environment

• Palo Alto Firewalls

• Supported PAN-OS

• BGP (Border Gateway Protocol)

• HA (High Availability)

• Active/Passive 

Answer

1. BGP does not need to re-establish in case of failover of a HA peer if  Graceful restart  is configured.

2. Refer to " HA Active/Passive Best Practices " when configuring HA.

3. The graceful restart must also be configured on the Peer Routers.