before the system switches over to the secondary RPM. OSPFv3 is notified that a planned restart is
happening.
–Unplanned-only: the OSPFv3 router supports graceful-restart only for unplanned restarts.
During an unplanned restart, OSPFv3 sends out a Grace LSA once the secondary RPM comes
online.
The default is both planned and unplanned restarts trigger an OSPFv3 graceful restart. Selecting one
or the other mode restricts OSPFv3 to the single selected mode.
• Disable OSPFv3 graceful-restart.
CONF-IPV6-ROUTER-OSPF mode
no graceful-restart grace-period
Displaying Graceful Restart
To display information on the use and configuration of OSPFv3 graceful restart, enter any of the following
commands.
• Display the graceful-restart configuration for OSPFv2 and OSPFv3 (shown in the following example).
EXEC Privilege mode
show run ospf
• Display the Type-11 Grace LSAs sent and received on an OSPFv3 router (shown in the following
example).
EXEC Privilege mode
show ipv6 ospf database grace-lsa
• Display the currently configured OSPFv3 parameters for graceful restart (shown in the following
example).
EXEC Privilege mode
show ipv6 ospf database database-summary
Example of the show run ospf Command
Example of the show ipv6 ospf database database-summary Command
Example of the show ipv6 ospf database grace-lsa Command
Dell#show run ospf
!
router ospf 1
router-id 200.1.1.1
log-adjacency-changes
graceful-restart grace-period 180
network 20.1.1.0/24 area 0
network 30.1.1.0/24 area 0
!
ipv6 router ospf 1
log-adjacency-changes
graceful-restart grace-period 180
Dell#show ipv6 ospf database database-summary
!
OSPFv3 Router with ID (200.1.1.1) (Process ID 1)
Open Shortest Path First (OSPFv2 and OSPFv3) 647