Dell PowerConnect 8100 CLI Reference Guide - Page 1320
Default Configuration, Command Mode, User Guidelines, Syntax, nsf restart-interval, no nsf
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Default Configuration A helpful neighbor exits helper mode when a topology change occurs. Command Mode Router OSPFv3 Configuration mode User Guidelines The restarting router is unable to react to topology changes. In particular, the restarting router will not immediately update its forwarding table; therefore, a topology change may introduce forwarding loops or black holes that persist until the graceful restart completes. By exiting the graceful restart on a topology change, a router tries to eliminate the loops or black holes as quickly as possible by routing around the restarting router. A helpful neighbor considers a link down with the restarting router to be a topology change, regardless of the strict LSA checking configuration. nsf restart-interval Use the nsf restart-interval command to configure the length of the grace period on the restarting router. Use the "no" form of this command to revert the grace period to its default. Syntax nsf [ietf] restart-interval seconds no nsf [ietf] restart-interval • ietf - This keyword is used to distinguish the IETF standard implementation of graceful restart from other implementations. Since the IETF implementation is the only one supported, this keyword is optional. • seconds - The number of seconds that the restarting router asks its neighbors to wait before exiting helper mode. The restarting router includes the restart interval in its grace LSAs (range 1-1800 seconds). Default Configuration The default restart interval is 120 seconds. 1320 OSPFv3 Commands
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