Netgear M4100-50G Manuel D’Utilisation

nsf helper disable

Use this command to disable helpful neighbor functionality for OSPF.

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.

nsf [ietf] 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 might 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.

Use this command to allow OSPF to continue as a helpful neighbor in spite of topology 
changes.

nsf [ietf] helper disable

OSPF Router Configuration

This keyword is accepted but not required.

Enabled

nsf [ietf] helper strict-lsa-checking 

OSPF Router Configuration

This keyword is accepted but not required.

Enabled