HP 6125XLG Layer 3 - Ip Routing Configuration Manual page 190

Figure 47 Network diagram
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Configuration procedure
1. Configure IP addresses and subnet masks for interfaces on the switches. (Details not shown.)
2. Configure IS-IS on the switches to make sure Switch A, Switch D, and Switch S can communicate
with each other at Layer 3. (Details not shown.)
3. Configure IS-IS FRR:
Enable IS-IS FRR to automatically calculate a backup next hop, or designate a backup next hop by
using a referenced routing policy.
(Method 1.) 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 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
Vlan-int200
13.13.13.1/24
Switch S
Switch A
Link B
Link A
Vlan-int200
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178
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Switch D