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Figure 109 Network diagram
Loop0
Switch A
Table 27 Interface and IP address assignment
Device
Switch A
Switch C
Configuration procedure
1.
Configure IPv6 addresses and subnet masks for interfaces on the switches. (Details not
shown.)
2.
Configure OSPFv3 on the switches to ensure that Switch A, Switch B, and Switch C can
communicate with each other at the network layer. (Details not shown.)
3.
Configure OSPFv3 FRR to automatically calculate the backup next hop:
You can enable OSPFv3 FRR to either calculate a backup next hop by using the LFA algorithm,
or specify a backup next hop by using a routing policy.
(Method 1.) Enable OSPFv3 FRR to calculate the backup next hop by using the LFA
algorithm:
# Configure Switch A.
<SwitchA> system-view
[SwitchA] ospfv3 1
[SwitchA-ospfv3-1] fast-reroute lfa
[SwitchA-ospfv3-1] quit
# Configure Switch B.
<SwitchB> system-view
[SwitchB] ospfv3 1
[SwitchB-ospfv3-1] fast-reroute lfa
[SwitchB-ospfv3-1] quit
(Method 2.) Enable OSPFv3 FRR to designate a backup next hop by using a routing policy:
# Configure Switch A.
<SwitchA> system-view
[SwitchA] ipv6 prefix-list abc index 10 permit 10:: 128
[SwitchA] route-policy frr permit node 10
[SwitchA-route-policy-frr-10] if-match ipv6 address prefix-list abc
[SwitchA-route-policy-frr-10] apply ipv6 fast-reroute backup-interface
vlan-interface 100 backup-nexthop 1::2/64
Switch C
Vlan-int200
Interface
IP address
Vlan-int100
1::1/64
Vlan-int200
2::1/64
Loop0
10::1/128
Vlan-int100
1::2/64
Vlan-int101
3::2/64
Link B
Link A
Vlan-int200
Device
Switch B
471
Loop0
Switch B
Interface
IP address
Vlan-int101
3::1/64
Vlan-int200
2::2/64
Loop0
20::1/128
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Troubleshooting
