By configuring OSPFv3 GR, you can avoid inaccurate route calculation and packet loss after an OSPFv3 device restarts.
To prevent route flapping and service interruption due to the restart of OSPFv3, you can enable OSPFv3 GR.
After OSPFv3 restarts, the GR restarter and the GR Helper keep the neighbor relationship, exchange routing information, synchronize the database, and update the routing table and the forwarding table. OSPFv3 fast convergence is therefore realized.
ospfv3 [ process-id ]
graceful-restart [ period period | ack-time time | retransmit-interval interval | lsa-checking-ignore | planned-only ] *
By default, OSPFv3 GR is disabled.
ack-time is optional. After ack-time is specified, the restarter can discover more neighbors in the time period.
helper-role [ acl-number acl-number | ip-prefix ip-prefix-name | max-grace-period period | planned-only | lsa-checking-ignore ] *
By default, the Helper of OSPFv3 GR is disabled.