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<SwitchS> system-view
[SwitchS] bfd echo-source-ip 10.10.10.10
[SwitchS] ip prefix-list abc index 10 permit 21.1.1.0 24
[SwitchS] route-policy frr permit node 10
[SwitchS-route-policy] if-match ip address prefix-list abc
[SwitchS-route-policy] apply fast-reroute backup-interface vlan-interface 12
backup-nexthop 12.12.12.2
[SwitchS-route-policy] quit
[SwitchS] ospf 1
[SwitchS-ospf-1] fast-reroute route-policy frr
[SwitchS-ospf-1] quit
# Configure Switch D.
<SwitchD> system-view
[SwitchD] bfd echo-source-ip 10.10.10.10
[SwitchD] ip prefix-list abc index 10 permit 11.1.1.0 24
[SwitchD] route-policy frr permit node 10
[SwitchD-route-policy] if-match ip address prefix-list abc
[SwitchD-route-policy] apply fast-reroute backup-interface vlan-interface 24
backup-nexthop 24.24.24.2
[SwitchD-route-policy] quit
[SwitchD] ospf 1
[SwitchD-ospf-1] fast-reroute route-policy frr
[SwitchD-ospf-1] quit
4. Enable MPLS and LDP:
# Configure Switch S.
[SwitchS] mpls lsr-id 1.1.1.1
[SwitchS] mpls ldp
[SwitchS-mpls-ldp] quit
[SwitchS] interface vlan-interface 12
[SwitchS-Vlan-interface12] mpls enable
[SwitchS-Vlan-interface12] mpls ldp enable
[SwitchS-Vlan-interface12] quit
[SwitchS] interface vlan-interface 13
[SwitchS-Vlan-interface13] mpls enable
[SwitchS-Vlan-interface13] mpls ldp enable
[SwitchS-Vlan-interface13] quit
# Configure Switch D.
[SwitchD] mpls lsr-id 3.3.3.3
[SwitchD] mpls ldp
[SwitchD-mpls-ldp] quit
[SwitchD] interface vlan-interface 13
[SwitchD-Vlan-interface13] mpls enable
[SwitchD-Vlan-interface13] mpls ldp enable
[SwitchD-Vlan-interface13] quit
[SwitchD] interface vlan-interface 24
[SwitchD-Vlan-interface24] mpls enable
[SwitchD-Vlan-interface24] mpls ldp enable
[SwitchD-Vlan-interface24] quit
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