HP MSR2000 series Configuration Manual page 190

Figure 68 Network diagram for IS-IS FRR configuration
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Configuration procedure
Configure IP addresses and subnet masks for interfaces on the switches. (Details not shown.)
1.
Configure IS-IS on the switches to make sure Switch A, Switch D, and Switch S can communicate
2.
with each other at Layer 3. (Details not shown.)
Configure IS-IS FRR:
3.
You can enable IS-IS FRR to either automatically calculate a backup next hop, or to designate a
backup next hop by using a referenced routing policy.
(Method I.) Enable IS-IS FRR to automatically calculate a backup next hop:
# Configure Switch S.
<SwitchS> system-view
[SwitchS] bfd echo-source-ip 1.1.1.1
[SwitchS] isis 1
[SwitchS-isis-1] fast-reroute auto
[SwitchS-isis-1] quit
# Configure Switch D.
<SwitchD> system-view
[SwitchD] bfd echo-source-ip 4.4.4.4
[SwitchD] isis 1
[SwitchD-isis-1] fast-reroute auto
[SwitchD-isis-1] quit
(Method II.) 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 ip-prefix abc index 10 permit 4.4.4.4 32
[SwitchS] route-policy frr permit node 10
[SwitchS-route-policy] if-match ip-prefix abc
[SwitchS-route-policy] apply fast-reroute backup-interface vlan-interface 100
backup-nexthop 12.12.12.2
[SwitchS-route-policy] 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
Vlan-int200
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Switch S
Switch A
Link B
Link A
Vlan-int200
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Switch D