Tag :: Backup

This feature allows configuring backup entries for static MPLS LFIB routes via EOS SDK RPC to be activated if its corresponding primary entries are unable to forward traffic due to next hops being unresolved or its corresponding interface being down. Any backup entries will not be activated to forward traffic until all primary entries are unviable. Thereby, backup entries configured for the Static MPLS routes are a mechanism to achieve fast failover when the primary path fails.

The alternate LDP pseudowire feature enables users to configure an alternate pseudowire to the existing (primary) pseudowire for a given patch. Preference is initially given to the primary pseudowire.

Destination based RTBH (remote triggered blackholing) is used on edge devices in a network to prevent DOS attack on a target network (IP/prefix) by blackholing/dropping the traffic destined towards this target. One of the ways to achieve this is through a trigger router sending a routing update for the prefix under attack to the edge routers configured for black hole filtering. The next-hop of such routing updates ends up getting resolved to a null/drop interface on the edge device, which results in blackholing all traffic destined towards this target network. 

This feature allows configuring backup nexthop group entries to be used if their corresponding primary entries are unable to forward traffic due to being unresolved or with outgoing interfaces that are marked as down. By default, any configured backup entries will not be activated to forward traffic until all primary nexthop group entries are unavailable. Backup nexthop group entries are a tool used to achieve fast failover when forwarding traffic via nexthop groups.