RelatedCommands • area-password — configures an IS-IS area authentication password.• isis priority — configures the authentication password for an interface.graceful-restart ietfEnable graceful restart on an IS-IS router.S4810Syntax graceful-restart ietfTo return to the default, use the no graceful-restart ietf command.Parameters ietf Enter ietf to enable graceful restart on the IS-IS router.Defaults Graceful restart disabled.CommandModesROUTER ISISCommandHistoryThis guide is platform-specific. For command information about other platforms,refer to the relevant Dell Networking OS Command Line Reference Guide.The following is a list of the Dell Networking OS version history for this command.Version 9.0.2.0 Introduced on the S6000.Version8.3.19.0Introduced on the S4820T.Version8.3.12.0Introduced on the S4810.Version 8.3.11.1 Introduced on the Z9000.Version 6.3.1.0 Introduced on the E-Series.UsageInformationEvery graceful restart enabled router’s HELLO PDUs includes a restart TLV. Thisrestart enables (re)starting as well as the existing ISIS peers to detect the GRcapability of the routers on the connected network. A flag in the Restart TLVcontains restart request (RR), restart acknowledge (RA) and suppress adjacencyadvertisement (SA) bit flags.The ISIS graceful restart-enabled router can co-exist in mixed topologies wheresome routers are graceful restart-enabled and others are not. For neighbors thatare not graceful restart-enabled, the restarting router brings up the adjacency perthe usual methods.Intermediate System to Intermediate System (IS-IS) 971
