R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

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Follow Figure 55 to configure the IP address and subnet mask of each interface on the routers.
(Details not shown.)
Configure IS-IS on the routers, ensuring that Router A, Router D, and Router S can communicate
with each other at Layer 3. (Details not shown.)
2. Configure IS-IS FRR:
Enable IS-IS FRR to either automatically calculate a backup next hop, or designate a backup next
hop by using a routing policy.
{ Method 1: Enable IS-IS FRR to automatically calculate a backup next hop.
# Configure Router S.
<RouterS> system-view
[RouterS] bfd echo-source-ip 1.1.1.1
[RouterS] isis 1
[RouterS-isis-1] fast-reroute auto
[RouterS-isis-1] quit
# Configure Router D.
<RouterD> system-view
[RouterD] bfd echo-source-ip 4.4.4.4
[RouterD] isis 1
[RouterD-isis-1] fast-reroute auto
[RouterD-isis-1] quit
{ Method 2: Enable IS-IS FRR to designate a backup next hop by using a routing policy.
# Configure Router S.
<RouterS> system-view
[RouterS] bfd echo-source-ip 1.1.1.1
[RouterS] ip ip-prefix abc index 10 permit 4.4.4.4 32
[RouterS] route-policy frr permit node 10
[RouterS-route-policy] if-match ip-prefix abc
[RouterS-route-policy] apply fast-reroute backup-interface gigabitethernet 2/1/1
backup-nexthop 12.12.12.2
[RouterS-route-policy] quit
[RouterS] isis 1
[RouterS-isis-1] fast-reroute route-policy frr
[RouterS-isis-1] quit
# Configure Router D.
<RouterD> system-view
[RouterD] bfd echo-source-ip 4.4.4.4
[RouterD] ip ip-prefix abc index 10 permit 1.1.1.1 32
[RouterD] route-policy frr permit node 10
[RouterD-route-policy] if-match ip-prefix abc
[RouterD-route-policy] apply fast-reroute backup-interface gigabitethernet 2/1/1
backup-nexthop 24.24.24.2
[RouterD-route-policy] quit
[RouterD] isis 1
[RouterD-isis-1] fast-reroute route-policy frr
[RouterD-isis-1] quit
3. Verify the configuration: