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As shown in
hop. When the primary link fails, RIPng directs packets to the backup next hop. At the same time,
RIPng calculates the shortest path based on the new network topology. Then, the device forwards
packets over that path after network convergence.
Configuration restrictions and guidelines
•
RIPng FRR is available only when the state of the primary link (with Layer 3 interfaces staying
up) changes from bidirectional to unidirectional or down.
•
RIPng FRR is only effective for RIPng routes that are learned from directly connected
neighbors.
•
Equal-cost routes do not support RIPng FRR.
Configuration prerequisites
You must specify a next hop by using the apply ipv6 fast-reroute backup-interface command in a
routing policy and reference the routing policy for FRR. For more information about routing policy
configuration, see
Configuring RIPng FRR
Step
1.
Enter system view.
2.
Enter RIPng view.
3.
Configure RIPng FRR.
Enabling BFD for RIPng FRR
By default, RIPng FRR does not use BFD to detect primary link failures. To speed up RIPng
convergence, enable BFD single-hop echo detection for RIPng FRR to detect primary link failures.
To configure BFD for RIPng FRR:
Step
1.
Enter system view.
2.
Configure the source IP
address of BFD echo
packets.
3.
Enter interface view.
4.
Enable BFD for RIPng FRR.
Figure
94, configure FRR on Router B by using a routing policy to specify a backup next
"Configuring routing
Command
system-view
ripng [ process-id ] [ vpn-instance
vpn-instance-name ]
fast-reroute route-policy
route-policy-name
Command
system-view
bfd echo-source-ipv6
ipv6-address
interface interface-type
interface-number
ripng primary-path-detect bfd
echo
policies."
415
Remarks
N/A
N/A
By default, RIPng FRR is
disabled.
Remarks
N/A
By default, the source IP address
of BFD echo packets is not
configured.
The source IP address cannot be
on the same network segment as
any local interface's IP address.
For more information about this
command, see High Availability
Command Reference.
N/A
By default, BFD for RIPng FRR is
disabled.
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Troubleshooting
