Dell S6000 FTOS 9.0(2.0) Command Line Reference Guide for the System - Page 649

Usage Information In OSPF, flooding is the most resource-consuming task. The flooding algorithm, described in RFC-2328, requires that OSPF flood LSAs (Link State Advertisements) on all interfaces, as governed by LSA's flooding scope (see Section 13 of the RFC). When multiple direct links connect two routers, the RFC-2328 flooding algorithm generates significant redundant information across all links. By default, FTOS implements an enhanced flooding procedure that dynamically and intelligently determines when to optimize flooding. Whenever possible, the OSPF task attempts to reduce flooding overhead by selectively flooding on a subset of the interfaces between two routers. When flood-2328 is enabled, this command configures FTOS to flood LSAs on all interfaces. graceful-restart grace-period s z S6000 Specifies the time duration, in seconds, that the router's neighbors will continue to advertise the router as fully adjacent regardless of the synchronization state during a graceful restart. Syntax graceful-restart grace-period seconds To disable the grace period, enter no graceful-restart grace-period. Parameters seconds Time duration, in seconds, that specifies the duration of the restart process before OSPF terminates the process. Range: 40 to 3000 seconds Defaults Not Configured Command Modes ROUTER OSPF Command History Version 9.0.2.0 Version 8.3.11.1 Version 7.8.1.0 Introduced on S6000. Introduced on Z9000 Introduced support for Multi-Process OSPF. Usage OSPF Graceful Restart is not supported on the S4810 system. Information graceful-restart helper-reject s z S6000 Specify the OSPF router to not act as a helper during graceful restart. Syntax graceful-restart helper-reject ip-address To return to default value, enter no graceful-restart helper-reject. Parameters ip-address Enter the OSPF router-id, in IP address format, of the restart router that will not act as a helper during graceful restart. Defaults Not Configured Command Modes ROUTER OSPF Open Shortest Path First (OSPFv2) | 649