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DELL 9.8(0.0) User Manual

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Defaults
none.
Command 
Modes
ROUTER OSPF
Command 
History
This guide is platform-specific. For command information about other platforms, 
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version
Description
9.7(0.0)
Introduced on the S6000-ON.
9.0.2.0
Introduced on the S6000.
8.3.19.0
Introduced on the S4820T.
8.3.11.1
Introduced on the Z9000.
8.3.7.0
Introduced on the S4810.
7.8.1.0
Introduced on all platforms.
Usage 
Information
The higher this parameter is set, the faster OSPF converge takes place.
NOTE: The faster the convergence, the more frequent the route calculations 
and updates. This behavior impacts CPU utilization and may impact adjacency 
stability in larger topologies.
Generally, convergence level 1 meets most convergence requirements. Higher 
convergence levels should only be selected following consultation with Dell 
Networking technical support.
graceful-restart grace-period
Specifies the time duration, in seconds, that the router’s neighbors continue to advertise the router as 
fully adjacent regardless of the synchronization state during a graceful restart.
NOTE: This command enables OSPFv2 graceful restart globally by setting the grace period (in 
seconds) that an OSPFv2 router’s neighbors continues to advertise the router as adjacent during a 
graceful restart.
S4820T 
Syntax
graceful-restart grace-period seconds
To disable the grace period, use the no graceful-restart grace-period 
command.
Parameters
seconds
Time duration, in seconds, that specifies the duration of the 
restart process before OSPF terminates the process. The 
range is from 40 to 1800 seconds.
Open Shortest Path First (OSPFv2 and OSPFv3)
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