Command Reference Guide

Open Shortest Path First Commands
CLI Command Reference
September 2014 Page 585
HP Moonshot Switch Module CLI Command Reference
no nsf helper
Use this command to disable helpful neighbor functionality for OSPF.
nsf ietf helper disable
Use this command to disable helpful neighbor functionality for OSPF.
nsf helper strict-lsa-checking
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.
Use this command to require that an OSPF helpful neighbor exit helper mode whenever a topology change
occurs.
Format
no nsf helper
Modes OSPF Router Configuration
Note: The commands no nsf helper and nsf ietf helper disable are functionally equivalent. The
command
nsf ietf helper disable is supported solely for compatibility with other network software
CLI.
Format
nsf ietf helper disable
Modes OSPF Router Configuration
Default Enabled.
Format
nsf [ietf] helper strict-lsa-checking
Modes OSPF Router Configuration
Parameter Description
ietf This keyword is accepted but not required.