Configuration prerequisites
Before you configure IS-IS FRR, complete the following tasks:
•
Configure IP addresses for interfaces to ensure IP connectivity between neighboring nodes.
Enable IS-IS.
•
Configuration guidelines
Do not use FRR and BFD at the same time. Otherwise, FRR might fail to take effect.
•
The automatic backup next hop calculation of FRR and that of TE are mutually exclusive.
•
Configuring IS-IS FRR to automatically calculate a backup next
hop
Step
1.
Enter system view.
2.
Configure the source address
of echo packets.
3.
Enter IS-IS view.
4.
Enable IS-IS FRR to
automatically calculate a
backup next hop.
Configuring IS-IS FRR using a routing policy
You can use the apply fast-reroute backup-interface command to specify a backup next hop in a routing
policy for routes matching specific criteria, and perform this task to reference the routing policy for IS-IS
FRR. For more information about the apply fast-reroute backup-interface command and routing policy
configurations, see
To configure IS-IS FRR using a routing policy:
Step
1.
Enter system view.
2.
Configure the source address
of echo packets.
3.
Enter IS-IS view.
4.
Enable IS-IS FRR using a
routing policy.
Command
system-view
bfd echo-source-ip ip-address
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
fast-reroute auto
"Configuring routing
policies."
Command
system-view
bfd echo-source-ip ip-address
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
fast-reroute route-policy
route-policy-name
154
Remarks
N/A
By default, the source address of
echo packets is not configured.
N/A
By default, IS-IS FRR is disabled.
Remarks
N/A
By default, the source address of
echo packets is not configured.
N/A
By default, this feature is not
enabled.