Netgear M4100-50G Manuel D’Utilisation

set long enough to allow the restarting router to reestablish all of its adjacencies and 
complete a full database exchange with each of those neighbors.

Use this command to revert the grace period to its default value.

nsf helper 

Use this command to enable helpful neighbor functionality for the OSPF protocol. You can 
enable this functionality for planned or unplanned restarts, or both.

Use this command to disable helpful neighbor functionality for OSPF.

120 seconds

nsf [ietf] restart-interval <1-1800> 

OSPF Router Configuration

This keyword is accepted but not required. 

The number of seconds that the restarting router asks its neighbors to wait before 
exiting helper mode. The range is from 1 to 1800 seconds.

no [ietf] nsf restart-interval 

OSPF Router Configuration

OSPF might act as a helpful neighbor for both planned and unplanned restarts

nsf [ietf] helper [planned-only] 

OSPF Router Configuration

This keyword is accepted but not required. 

This optional keyword indicates that OSPF should only help a restarting router 
performing a planned restart.

no nsf [ietf] helper 

OSPF Router Configuration