graceful-restart ietfEnable graceful restart on an IS-IS router.Syntax 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.Command Modes ROUTER ISISCommand History This guide is platform-specific. For command information about other platforms, see the relevant Dell NetworkingOS Command Line Reference Guide.Version Description9.10(0.0) Introduced on the S6100–ON.9.8(1.0) Introduced on the Z9100–ON.9.8(0.0P5) Introduced on the S4048-ON.9.8(0.0P2) Introduced on the S3048-ON.9.7(0.0) Introduced on the S6000-ON.9.5(0.1) Introduced on the Z9500.9.0.2.0 Introduced on the S6000.8.3.19.0 Introduced on the S4820T.8.3.12.0 Introduced on the S4810.8.3.11.1 Introduced on the Z9000.6.3.1.0 Introduced on the E-Series.Usage Information Every graceful restart enabled router’s HELLO PDUs includes a restart TLV. This restart enables (re)starting as wellas the existing ISIS peers to detect the GR capability of the routers on the connected network. A flag in theRestart TLV contains restart request (RR), restart acknowledge (RA) and suppress adjacency advertisement (SA)bit flags.The ISIS graceful restart-enabled router can co-exist in mixed topologies where some routers are graceful restart-enabled and others are not. For neighbors that are not graceful restart-enabled, the restarting router brings up theadjacency per the usual methods.graceful-restart intervalSet the graceful restart grace period, the time during that all graceful restart attempts are prevented.Syntax graceful-restart interval minutes854 Intermediate System to Intermediate System (IS-IS)
