HP 6125XLG Configuration Manual page 166

[SwitchD-isis-1] quit
(Method 2.) Enable IS-IS FRR to designate a backup next hop by using a referenced routing
policy:
# Configure Switch S.
<SwitchS> system-view
[SwitchS] bfd echo-source-ip 1.1.1.1
[SwitchS] ip prefix-list abc index 10 permit 4.4.4.4 32
[SwitchS] route-policy frr permit node 10
[SwitchS-route-policy-frr-10] if-match ip address prefix-list abc
[SwitchS-route-policy-frr-10] apply fast-reroute backup-interface vlan-interface
100 backup-nexthop 12.12.12.2
[SwitchS-route-policy-frr-10] quit
[SwitchS] isis 1
[SwitchS-isis-1] fast-reroute route-policy frr
[SwitchS-isis-1] quit
# Configure Switch D.
<SwitchD> system-view
[SwitchD] bfd echo-source-ip 4.4.4.4
[SwitchD] ip prefix-list abc index 10 permit 1.1.1.1 32
[SwitchD] route-policy frr permit node 10
[SwitchD-route-policy-frr-10] if-match ip address prefix-list abc
[SwitchD-route-policy-frr-10] apply fast-reroute backup-interface vlan-interface
101 backup-nexthop 24.24.24.2
[SwitchD-route-policy-frr-10] quit
[SwitchD] isis 1
[SwitchD-isis-1] fast-reroute route-policy frr
[SwitchD-isis-1] quit
Verifying the configuration
# Display route 4.4.4.4/32 on Switch S to view the backup next hop information.
[SwitchS] display ip routing-table 4.4.4.4 verbose
Summary Count : 1
Destination: 4.4.4.4/32
Protocol: ISIS
SubProtID: 0x1
Cost: 10
Tag: 0
OrigTblID: 0x0
TableID: 0x2
NBRID: 0x26000002
AttrID: 0xffffffff
Flags: 0x1008c
Label: NULL
BkLabel: NULL
Tunnel ID: Invalid
BkTunnel ID: Invalid
Process ID: 1
Age: 04h20m37s
Preference: 10
State: Active Adv
OrigVrf: default-vrf
OrigAs: 0
LastAs: 0
Neighbor: 0.0.0.0
OrigNextHop: 13.13.13.2
RealNextHop: 13.13.13.2
BkNextHop: 12.12.12.2
Interface: Vlan-interface200
BkInterface: Vlan-interface100
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