R0106-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V7)

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• The automatic backup next hop calculation of FRR and that of TE are mutually exclusive.
Configuration procedure
Configuring IS-IS FRR to automatically calculate a backup next hop
Ste
p
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 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 IPv4 unicast
address family view or IS-IS
IPv4 unicast topology view.
• Enter IS-IS IPv4 unicast address family
view:
a. isis [ process-id ] [ vpn-instance
vpn-instance-name ]
b. cost-style { wide | wide-compatible }
c. address-family ipv4 [ unicast ]
• Enter IS-IS IPv4 unicast topology view:
d. isis [ process-id ] [ vpn-instance
vpn-instance-name ]
e. cost-style { wide | wide-compatible }
f. address-family ipv4 [ unicast ]
g. topology topo-name tid tid
Use either method.
6. Enable IS-IS FRR to
automatically calculate a
backup next hop.
fast-reroute auto
By default, IS-IS FRR is
disabled.
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. You can also 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 "Configuring routing policies."
To configure IS-IS FRR using a routing policy:
Ste
p
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 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