BGP route advertisement based on Packet Forwarding Engine acknowledgement

You can enable BGP to advertise routes only if the route version installed in the Routing Engine matches the route version installed in the Packet Forwarding Engine. If a mismatch occurs, then BGP withdraws the route from the forwarding path and stops advertising the route. You can enable this feature by including the request-long-lived-ack and the send-withdrawal-on-route-change configuration statements at the [edit policy-options policy-statement policy-name then] hierarchy level.