Dell 9.7(0.0) manual History, Parameters Planned-only

Command	This guide is platform-specific. For command information about other platforms,
History	refer to the relevant Dell Networking OS Command Line Reference Guide.
	The following is a list of the Dell Networking OS version history for this command.

Usage Information

VersionDescription

9.1.(0.0) Introduced on the S4810 and Z9000.

8.4.2.2Introduced on the E-Series TeraScale.

8.3.19.0Introduced on the S4820T.

By default, OSPFv3 graceful restart is disabled and functions only in a helper role to help restarting neighbor routers in their graceful restarts when it receives a Grace LSA.

To enable OSPFv3 graceful restart, enter the ipv6 router ospf command to enter OSPFv3 configuration mode and then configure a grace period using the graceful- restart grace-period command. The grace period is the length of time that OSPFv3 neighbors continue to advertise the restarting router as though it is fully adjacent. When graceful restart is enabled (restarting role), an OSPFv3 restarting expects its OSPFv3 neighbors to help when it restarts by not advertising the broken link.

When you enable the helper-reject role on an interface with the ipv6 ospf graceful- restart helper-reject command, you reconfigure OSPFv3 graceful restart to function in a “restarting-only” role. In a “restarting-only” role, OSPFv3 does not participate in the graceful restart of a neighbor.

graceful-restart mode

Specify the type of events that trigger an OSPFv3 graceful restart.

Syntax	graceful-restart mode {planned-only unplanned-only}
	To disable graceful restart mode, enter no graceful-restart mode.
Parameters	planned-only	(OPTIONAL) Enter the keywords planned-onlyto indicate
		graceful restart is supported in a planned restart condition
		only.
	unplanned-	(OPTIONAL) Enter the keywords unplanned-onlyto
	only	indicate graceful restart is supported in an unplanned restart
		condition only.
Defaults	OSPFv3 graceful restart supports both planned and unplanned failures.
Command	ROUTER OSPFv3
Modes

Open Shortest Path First (OSPFv2 and OSPFv3) 1151