Dell Networking S4810, Reference Manual

Page: 1246 / 1761

Command
Modes ROUTER OSPFv3
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 9.1.
(0.0) Introduced on the S4810 and Z9000.
Version 8.4.2.2 Introduced on the E-Series TeraScale.
Version
8.3.19.0 Introduced on the S4820T.
Usage
Information
By default, OSPFv3 graceful restart is disabled and functions only in a helper role to
help restarting neighbor routers in their graceful restarts when it receives a Grace
LSA.
To enable OSPFv3 graceful restart, enter the ipv6 router ospf command to enter
OSPFv3 configuration mode and then configure a grace period using the graceful-
restart grace-period command. The grace period is the length of time that OSPFv3
neighbors continue to advertise the restarting router as though it is fully adjacent.
When graceful restart is enabled (restarting role), an OSPFv3 restarting expects its
OSPFv3 neighbors to help when it restarts by not advertising the broken link.
When you enable the helper-reject role on an interface with the ipv6 ospf graceful-
restart helper-reject command, you reconfigure OSPFv3 graceful restart to
function in a “restarting-only” role. In a “restarting-only” role, OSPFv3 does not
participate in the graceful restart of a neighbor.
graceful-restart mode
Specify the type of events that trigger an OSPFv3 graceful restart.
S4810
Syntax
graceful-restart mode {planned-only | unplanned-only}
To disable graceful restart mode, enter
no graceful-restart mode
.
Parameters
planned-only (OPTIONAL) Enter the keywords
planned-only
to indicate
graceful restart is supported in a planned restart condition
only.
unplanned-
only (OPTIONAL) Enter the keywords
unplanned-only
to
indicate graceful restart is supported in an unplanned restart
condition only.
Defaults OSPFv3 graceful restart supports both planned and unplanned failures.
1246
Open Shortest Path First (OSPFv2 and OSPFv3)