Dell Force10 Z9000 FTOS Command Line Reference Guide for the Z9000 System FTOS - Page 1110
graceful-restart grace-period
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Defaults Command Modes Command History Related Commands • 1 = Type 1 external route • 2 = Type 2 external route route-map mapname (OPTIONAL) Enter the keywords route-map followed by the name of an established route map. Disabled. ROUTER OSPFv3 Version 9.1.(0.0) Version 7.8.1.0 Version 7.4.1.0 Introduced on the S4810 and Z9000. Added support for C-Series. Introduced on the E-Series. redistribute - redistributes routes from other routing protocols into OSPFv3. graceful-restart grace-period Enable OSPFv3 graceful restart globally by setting the grace period (in seconds) that an OSPFv3 router's neighbors will continue to advertise the router as adjacent during a graceful restart. E-Series TeraScale, Z-Series, S4810 Syntax graceful-restart grace-period seconds 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 before OSPFv3 terminates the process. The range is 40 to 1800 seconds. Defaults Command Modes Command History OSPFv3 graceful restart is disabled and functions in a helper-only role. ROUTER OSPFv3 Version 9.1.(0.0) Version 8.4.2.2 Introduced on the S4810 and Z9000. Introduced on the E-Series TeraScale. Usage Information 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, you must 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- 1110
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