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Parameters
acl-number
: Basic or advanced ACL number, in the range 2000 to 3999.
prefix-list
: Name of the specified IP prefix list, a string of 1 to 19 characters.
Description
Use the
graceful-restart help
command to configure for which OSPF neighbors the current router
can serve as a GR Helper. (The neighbors are specified by the ACL or the IP prefix list.)
Use the
undo graceful-restart help
command to restore the default.
By default, the router can serve as a GR Helper for any OSPF neighbor.
Examples
# Enable IETF standard GR for OSPF process 1 and configure the router as a GR Helper for OSPF
neighbors defined in the ACL 2001.
<Sysname> system-view
[Sysname] ospf 1
[Sysname-ospf-1] opaque-capability enable
[Sysname-ospf-1] graceful-restart help 2001
# Enable non IETF standard GR for OSPF process 1 and configure the router as a GR Helper for
OSPF neighbors defined in the ACL 2001.
<Sysname> system-view
[Sysname] ospf 1
[Sysname-ospf-1] enable link-local-signaling
[Sysname-ospf-1] enable out-of-band-resynchronization
[Sysname-ospf-1] graceful-restart help 2001
graceful-restart interval (OSPF view)
Syntax
graceful-restart interval interval-value
undo graceful-restart interval
View
OSPF view
Default Level
2: System level
Parameters
interval-value
: Specifies the Graceful Restart interval, in the range 40 to 1,800 seconds.
Description
Use the
graceful-restart interval
command to configure the Graceful Restart interval.
Use the
undo graceful-restart interval
command to restore the default Graceful Restart interval.
By default, the Graceful Restart interval is 120 seconds.
Note that the Graceful Restart interval of OSPF cannot be less than the maximum value of dead
intervals on all OSPF interfaces; otherwise, the Graceful Restart of OSPF may fail.
Related commands:
ospf timer dead
.