Cisco NCS 6000 Series Configuration Manual page 262

Configure Remote Loop-Free Alternate Paths for IS-IS
Figure 14: Remote LFA Topology
Configuration
To configure RLFA with IS-IS, use the following steps.
1. Configure the interface(s) of the router.
RP/0/RP0/CPU0:router#configure
RP/0/RP0/CPU0:router(config)#interface gigabitEthernet 0/0/0/1
RP/0/RP0/CPU0:router(config-if)#ipv4 address 10.1.1.1 255.255.255.0
RP/0/RP0/CPU0:router(config-if)#no shutdown
RP/0/RP0/CPU0:router(config-if)#exit
RP/0/RP0/CPU0:router(config)#interface gigabitEthernet 0/0/0/2
RP/0/RP0/CPU0:router(config-if)#ipv4 address 10.10.10.1 255.255.255.0
RP/0/RP0/CPU0:router(config-if)#no shutdown
RP/0/RP0/CPU0:router(config-if)#exit
RP/0/RP0/CPU0:router(config)#interface loopback0
RP/0/RP0/CPU0:router(config-if)#ipv4 address 10.10.10.1 255.255.255.255
RP/0/RP0/CPU0:router(config-if)#no shutdown
RP/0/RP0/CPU0:router(config-if)#exit
2. Configure IS-IS.
RP/0/RP0/CPU0:router(config)#router isis rlfa
RP/0/RP0/CPU0:router(config-isis)#net 10.0001.0001.0001.00
cted
3. Configure RLFA for IS-IS.
RP/0/RP0/CPU0:router(config-isis)# interface gigabitEthernet 0/0/0/1
RP/0/RP0/CPU0:router(config-isis-if)#address-family ipv4 unicast
RP/0/RP0/CPU0:router(config-isis-if-af)#fast-reroute per-prefix remote-lfa tunnel mpls-ldp
RP/0/RP0/CPU0:router(config-isis-if-af)#fast-reroute per-prefix remote-lfa maximum-metric
20
RP/0/RP0/CPU0:router(config-isis-if-af)#exit
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
240
Implementing IS-IS