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IMPORTANT:
If you want to use prefix suppression, as a best practice, configure prefix suppression on all OSPFv3
routers.
Configuring prefix suppression for an OSPFv3 process
Enabling prefix suppression for an OSPFv3 process does not suppress the prefixes of loopback
interfaces and passive interfaces.
To configure prefix suppression for an OSPFv3 process:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter OSPFv3
view.
ospfv3
[ process-id |
vpn-instance
vpn-instance-name ] *
N/A
3. Enable prefix
suppression for the
OSPFv3 process.
prefix-suppression
By default, prefix suppression
is disabled for an OSPFv3
process.
Configuring prefix suppression for an interface
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter interface
view.
interface
interface-type interface-number
N/A
3. Enable prefix
suppression for the
interface.
ospfv3 prefix-suppression
[
disable
]
[
instance
instance-id ]
By default, prefix suppression
is disabled on an interface.
Configuring OSPFv3 GR
GR ensures forwarding continuity when a routing protocol restarts or an active/standby switchover
occurs.
Two routers are required to complete a GR process. The following are router roles in a GR process:
• GR restarter—Graceful restarting router. It must be Graceful Restart capable.
• GR helper—The neighbor of the GR restarter. It helps the GR restarter to complete the GR
process.
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.
• Establish all adjacencies and obtain complete topology information after reboot.
After the active/standby switchover, the GR restarter sends a Grace LSA to tell its neighbors that it
performs a GR. Upon receiving the Grace LSA, the neighbors with the GR helper capability enter the
helper mode (and are called GR helpers). Then, the GR restarter retrieves its adjacencies and LSDB
with the help of the GR helpers.
Configuring GR restarter
You can configure the GR restarter capability on a GR restarter.
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