JhayR Lv2Posted 17 Oct 2022 11:38
  
OSPF may swiftly transition to a backup path when a primary path fails thanks to LFA Fast Reroute. When the primary path fails, OSPF would need to restart SPF in order to find a new path without LFA FRR. When using LFA FRR, OSPF pre-calculates a backup path and inserts the backup next hop into the forwarding table.

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