Configuring Graceful OSPFv3 Restart

Configure a router to perform graceful OSPFv3 (Open Shortest Path First version 3) restart:
configure ospfv3 restart [none | planned | unplanned | both]
Since a router can act as a restart helper router to multiple neighbors, you will specify which neighbors to help.
Configure a router interface to act as a graceful OSPFv3 restart helper:
configure ospfv3 [[vlan | tunnel] all | {vlan} vlan-name | {tunnel} tunnel-name | area area-identifier] restart-helper [none | planned | unplanned | both]

configure ospfv3 virtual-link {routerid} router_identifier {area} area_identifier timer {retransmit-interval} retransmit_interval {transit-delay} transit_delay {hello-interval} hello_interval {dead-interval} dead_interval
The graceful restart period sent out to helper routers can be configured with the following command:
configure ospfv3 restart grace-period seconds
By default, a helper router will terminate graceful restart if received LSAs would affect the restarting router.

This will occur when the restart-helper receives an LSA that will be flooded to the restarting router or when there is a changed LSA on the restarting router's retransmission list when graceful restart is initiated.
Disable or enable helper router LSA check:

Published March 2020prev | next