Service Manual

Version Description
9.8(1.0) Introduced on the Z9100-ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.2(1.0) Introduced on the Z9500.
9.1.(0.0) Introduced on the S4810 and Z9000.
8.4.2.2 Introduced on the E-Series.
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 conguration mode and
then congure 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 recongure 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.
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.
Command Modes ROUTER OSPFv3
Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.8(1.0) Introduced on the Z9100-ON.
9.8(0.0P5) Introduced on the S4048-ON.
1170 Open Shortest Path First (OSPFv2 and OSPFv3)