Command History Version 8.3.11.1 Introduced on the Z9000.Version 8.3.7.0 Introduced on the S4810.Version 7.8.1.0 Added support for Multi-Process OSPF.Version 7.6.1.0 Introduced on the S-Series.Version 7.5.1.0 Introduced on the C-Series and E-Series.UsageInformationIn OSPF, flooding is the most resource-consuming task. The flooding algorithm, described inRFC-2328, requires that OSPF flood LSAs (Link State Advertisements) on all interfaces, asgoverned by LSA’s flooding scope (see Section 13 of the RFC). When multiple direct linksconnect two routers, the RFC-2328 flooding algorithm generates significant redundantinformation across all links.By default, FTOS implements an enhanced flooding procedure that dynamically andintelligently determines when to optimize flooding. Whenever possible, the OSPF task attemptsto reduce flooding overhead by selectively flooding on a subset of the interfaces between tworouters.When you enable flood-2328, this command configures FTOS to flood LSAs on allinterfaces.graceful-restart grace-periodSpecifies the time duration, in seconds, that the router’s neighbors will continue to advertise the router as fully adjacentregardless of the synchronization state during a graceful restart.C-Series, E-Series, S-Series, Z-Series, S4810Syntax graceful-restart grace-period secondsTo disable the grace period, use the no graceful-restart grace-periodcommand.Parametersseconds Time duration, in seconds, that specifies the duration of the restartprocess before OSPF terminates the process. The range is 40 to 1800seconds.Defaults Not ConfiguredCommand Modes ROUTER OSPFCommand History Version 8.3.11.1 Introduced on the Z9000.Version 8.3.7.0 Introduced on the S4810.Version 7.8.1.0 Introduced on the S-Series. Added support for Multi-Process OSPF.Version 7.5.1.0 Introduced on the C-Series.pre-Version6.1.1.1Introduced on the E-Series.1052
