Graceful-Restart Helper Enable - HP 5920 Series Command Reference Manual

Default
The GR capability for OSPFv3 is disabled.
Views
OSPFv3 view
Predefined user roles
network-admin
Parameters
global: Enables global GR. In global GR mode, a GR process can be completed only when all GR
helpers exist. A GR process fails if a GR helper fails (for example, the interface connected to the GR
helper goes down). If you do not specify this keyword, the command enables partial GR. In partial GR
mode, a GR process can be completed as long as one GR helper exists. This keyword is available in
Release 231 1P04 and later versions.
planned-only: Enables planned GR only. If you do not specify this keyword, the command enables both
planned GR and unplanned GR. This keyword is available in Release 231 1P04 and later versions.
Usage guidelines
GR includes planned GR and unplanned GR.
Planned GR—Manually restarts OSPFv3 or performs an active/standby switchover. Before OSPFv3
•
restart or active/standby switchover, the GR restarter sends Grace-LSAs to GR helpers.
Unplanned GR—OSPFv3 restarts or an active/standby switchover occurs because of device failure.
•
Before OSPFv3 restart or active/standby switchover, the GR restarter does not send Grace-LSAs to
GR helpers.
OSPFv3 GR and OSPFv3 NSR are mutually exclusive. Do not configure the graceful-restart enable
command and the non-stop-routing command at the same time.
To prevent service interruption after a master/backup switchover, a GR restarter running OSPFv3 must
complete the following tasks:
Keep the GR restarter forwarding entries stable during reboot.
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Establish all adjacencies and obtain complete topology information after reboot.
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Examples
# Enable the GR capability for OSPFv3 process 1.
<Sysname> system-view
[Sysname] ospfv3 1
[Sysname-ospfv3-1] graceful-restart enable
Related commands

graceful-restart helper enable

graceful-restart helper enable
Use graceful-restart helper enable to enable the GR helper capability for OSPFv3.
Use undo graceful-restart helper enable to disable the GR helper capability for OSPFv3.
Syntax
graceful-restart helper enable [ planned-only ]
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