What is BGP Auto FRR?

Hello friend!

As a protection measure against faults over links, BGP Auto Fast Reroute (FRR) is applicable to networks with primary and backup links. With BGP Auto FRR, traffic can be switched between two BGP peers or next hops within sub-seconds.
With BGP Auto FRR, if a peer has multiple routes with the same prefix that are learned from different peers, the peer uses the optimal route as the primary link to forward packets and the less optimal route as a backup link. If the primary link fails, the peer rapidly notifies other peers that the BGP route has become unreachable and then switches traffic from the primary link to the backup link.

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