To disable OSPFv3 graceful restart, enter no graceful-restart grace-period.Parameters seconds Time duration, in seconds, that specifies the duration of the restart process beforeOSPFv3 terminates the process. The range is from 40 to 1800 seconds.Defaults OSPFv3 graceful restart is disabled and functions in a helper-only role.Command Modes ROUTER OSPFv3Command History This guide is platform-specific. For command information about other platforms, see the relevant Dell NetworkingOS Command Line Reference Guide.Version Description9.10(0.0) Introduced on the S6100-ON.9.8(1.0) Introduced on the Z9100-ON.9.8(0.0P5) Introduced on the S4048-ON.9.8(0.0P2) Introduced on the S3048-ON.9.2(1.0) Introduced on the Z9500.9.1.(0.0) Introduced on the S4810 and Z9000.8.4.2.2 Introduced on the E-Series.8.3.19.0 Introduced on the S4820T.Usage Information By default, OSPFv3 graceful restart is disabled and functions only in a helper role to help restarting neighborrouters 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 andthen configure a grace period using the graceful-restart grace-period command. The grace period is the length oftime that OSPFv3 neighbors continue to advertise the restarting router as though it is fully adjacent. Whengraceful restart is enabled (restarting role), an OSPFv3 restarting expects its OSPFv3 neighbors to help when itrestarts 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, OSPFv3does not participate in the graceful restart of a neighbor.graceful-restart modeSpecify 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.Open Shortest Path First (OSPFv2 and OSPFv3) 1159
