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To configure BFD for OSPFv3, you need to configure OSPFv3 first.
To configure BFD for OSPFv3:
1. Enter system view.
system-view
N/A
2. Enter OSPFv3 view.
ospfv3
[ process-id |
vpn-instance
vpn-instance-name ] *
N/A
3. Specify a router ID.
router-id
router-id
N/A
4. Quit the OSPFv3 view.
N/A
5. Enter interface view.
interface
interface-type
interface-number
N/A
6. Enable an OSPFv3 process
on the interface.
ospfv3
process-id
area
area-id
[
instance
instance-id ]
N/A
7. Enable BFD on the interface.
ospfv3 bfd enable
[
instance
instance-id ]
By default, BFD is disabled on the
OSPFv3 interface.
Configuring OSPFv3 FRR
A primary link failure can cause packet loss and even a routing loop until OSPFv3 completes routing
convergence based on the new network topology. OSPFv3 FRR enables fast rerouting to minimize
the failover time.
Figure 100 Network diagram for OSPFv3 FRR
As shown in Figure 100, configure FRR on Router B. OSPFv3 FRR automatically calculates a
backup next hop or specifies a backup next hop by using a routing policy. When the primary link fails,
OSPFv3 directs packets to the backup next hop. At the same time, OSPFv3 calculates the shortest
path based on the new network topology. It forwards packets over the path after network
convergence.
You can configure OSPFv3 FRR to calculate a backup next hop by using the loop free alternate (LFA)
algorithm, or specify a backup next hop by using a routing policy.
Configuration prerequisites
Before you configure OSPFv3 FRR, perform the following tasks:
Configure IPv6 addresses for interfaces to ensure IP connectivity between neighboring nodes.
Enable OSPFv3.
Make sure the backup next hop is reachable.
Backup nexthop: Router C
Router ENexthop: Router D
Router A Router B
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