Configuration procedure
Configuring IPv6 IS-IS FRR to calculate a backup next hop through LFA calculation
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter interface view. | interface interface-type interface-number | N/A |
3. (Optional.) Disable LFA calculation on the interface. | isis ipv6 fast-reroute lfa-backup exclude | By default, the interface participates in LFA calculation and can be elected as a backup interface. |
4. Return to system view. | quit | N/A |
5. Enter IS-IS IPv6 unicast address family view. | isis [ process-id ] [ vpn-instance vpn-instance-name ] address-family ipv6 [ unicast ] | N/A |
6. Enable IPv6 IS-IS FRR to calculate a backup next hop through LFA calculation. | fast-reroute lfa | By default, IPv6 IS-IS FRR is disabled. |
Configuring IPv6 IS-IS FRR using a routing policy
You can use the apply ipv6 fast-reroute backup-interface command to specify a backup next hop in a routing policy for routes matching specific criteria. You can also perform this task to reference the routing policy for IPv6 IS-IS FRR. For more information about the apply ipv6 fast-reroute backup-interface command and routing policy configurations, see "Configuring routing policies."
To configure IPv6 IS-IS FRR using a routing policy:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter interface view. | interface interface-type interface-number | N/A |
3. (Optional.) Disable LFA calculation on the interface. | isis ipv6 fast-reroute lfa-backup exclude | By default, the interface participates in LFA calculation, and can be elected as a backup interface. |
4. Return to system view. | quit | N/A |
5. Enter IS-IS IPv6 unicast address family view. | isis [ process-id ] [ vpn-instance vpn-instance-name ] | N/A |
address-family ipv6 [ unicast ] | ||
6. Enable IPv6 IS-IS FRR using a routing policy. | fast-reroute route-policy route-policy-name | By default, IPv6 IS-IS FRR is disabled. |
Enabling BFD for IPv6 IS-IS FRR
By default, IPv6 IS-IS FRR does not use BFD to detect primary link failures. To speed up IPv6 IS-IS convergence, enable BFD for IPv6 IS-IS FRR to detect primary link failures.
To enable BFD control packet mode for IPv6 IS-IS FRR:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter interface view. | interface interface-type interface-number | N/A |
3. Enable BFD control packet mode for IPv6 IS-IS FRR. | isis ipv6 primary-path-detect bfd ctrl | By default, BFD control packet mode for IPv6 IS-IS FRR is disabled. |
To enable BFD echo packet mode for IPv6 IS-IS FRR:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Configure the source IPv6 address of BFD echo packets. | bfd echo-source-ipv6 ip-address | By default, the source IPv6 address of BFD echo packets is not configured. The source IPv6 address cannot be on the same network segment as any local interface's IP address. For more information, see High Availability Command Reference. |
3. Enter interface view. | interface interface-type interface-number | N/A |
4. Enable BFD echo packet mode for IPv6 IS-IS FRR. | isis ipv6 primary-path-detect bfd echo | By default, BFD echo packet mode for IPv6 IS-IS FRR is disabled. |