graceful-restart enable

Use graceful-restart enable to enable the GR capability for OSPFv3.

Use undo graceful-restart enable to disable the GR capability for OSPFv3.

Syntax

graceful-restart enable [ global | planned-only ] *

undo graceful-restart enable

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.

planned-only: Enables planned GR only. If you do not specify this keyword, the command enables both planned GR and unplanned GR.

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 perform the following tasks:

• Keep the GR restarter forwarding entries stable during reboot.

• Establish all adjacencies and obtain complete topology information after reboot.

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