176
[SwitchA] bfd echo-source-ip 2.2.2.2
[SwitchA] isis 1
[SwitchA-isis-1] fast-reroute auto
[SwitchA-isis-1] quit
# Configure Switch B.
<SwitchB> system-view
[SwitchB] bfd echo-source-ip 3.3.3.3
[SwitchB] isis 1
[SwitchB-isis-1] fast-reroute auto
[SwitchB-isis-1] quit
{ (Method 2.) Enable IS-IS FRR to designate a backup next hop by using a referenced routing
policy:
# Configure Switch A.
<SwitchA> system-view
[SwitchA] bfd echo-source-ip 2.2.2.2
[SwitchA] ip prefix-list abc index 10 permit 4.4.4.4 32
[SwitchA] route-policy frr permit node 10
[SwitchA-route-policy-frr-10] if-match ip address prefix-list abc
[SwitchA-route-policy-frr-10] apply fast-reroute backup-interface vlan-interface
100 backup-nexthop 12.12.12.2
[SwitchA-route-policy-frr-10] quit
[SwitchA] isis 1
[SwitchA-isis-1] fast-reroute route-policy frr
[SwitchA-isis-1] quit
# Configure Switch B.
<SwitchB> system-view
[SwitchB] bfd echo-source-ip 3.3.3.3
[SwitchB] ip prefix-list abc index 10 permit 1.1.1.1 32
[SwitchB] route-policy frr permit node 10
[SwitchB-route-policy-frr-10] if-match ip address prefix-list abc
[SwitchB-route-policy-frr-10] apply fast-reroute backup-interface vlan-interface
101 backup-nexthop 24.24.24.2
[SwitchB-route-policy-frr-10] quit
[SwitchB] isis 1
[SwitchB-isis-1] fast-reroute route-policy frr
[SwitchB-isis-1] quit
Verifying the configuration
# Display route 4.4.4.4/32 on Switch A to view the backup next hop information.
[SwitchA] display ip routing-table 4.4.4.4 verbose
Summary Count : 1
Destination: 4.4.4.4/32
Protocol: ISIS Process ID: 1
SubProtID: 0x1 Age: 04h20m37s
Cost: 10 Preference: 10
Tag: 0 State: Active Adv
OrigTblID: 0x0 OrigVrf: default-vrf
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