Configuring OSPF and OSPFv3 979
Configuring NSF Settings for OSPF
Beginning in Privileged EXEC mode, use the following commands to
configure the non-stop forwarding settings for OSPF.
exit Exit to Global Config mode.
exit Exit to Privileged EXEC mode.
show ip ospf View OSPF configuration and status information,
including route distribution information.
Command Purpose
configure Enter global configuration mode.
router ospf Enter OSPF configuration mode.
nsf [ietf ] helper strict-lsa-
checking
Require that an OSPF helpful neighbor exit helper mode
whenever a topology change occurs. Use the ietf keyword
to distinguish the IETF standard implementation of
graceful restart from other implementations.
nsf [ietf ] restart-interval
seconds
Configure the length of the grace period on the restarting
router.
The
seconds
keyword is 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)
nsf helper [planned-only] Allow OSPF to act as a helpful neighbor for a restarting
router. Include the planned-only keyword to indicate
that OSPF should only help a restarting router
performing a planned restart.
Command Purpose
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