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Configuration procedure
1. Configure IPv6 addresses for interfaces. (Details not shown.)
2. Configure IPv6 static routes and BFD:
# Configure IPv6 static routes on Router A and enable BFD control packet mode for the IPv6 static
route that traverses Router D.
<RouterA> system-view
[RouterA] interface loopback 1
[RouterA-LoopBack1] bfd min-transmit-interval 500
[RouterA-LoopBack1] bfd min-receive-interval 500
[RouterA-LoopBack1] bfd detect-multiplier 9
[RouterA-LoopBack1] quit
[RouterA] ipv6 route-static 120:: 64 2::9 bfd control-packet bfd-source 1::9
[RouterA] ipv6 route-static 120:: 64 10::100 preference 65
[RouterA] quit
# Configure IPv6 static routes on Router B and enable BFD control mode for the IPv6 static route
that traverses Router D.
<RouterB> system-view
[RouterB] interface loopback 1
[RouterB-LoopBack1] bfd min-transmit-interval 500
[RouterB-LoopBack1] bfd min-receive-interval 500
[RouterB-LoopBack1] bfd detect-multiplier 9
[RouterB-LoopBack1] quit
[RouterB] ipv6 route-static 121:: 64 1::9 bfd control-packet bfd-source 2::9
[RouterB] ipv6 route-static 121:: 64 13::2 preference 65
[RouterB] quit
# Configure IPv6 static routes on Router C.
<RouterC> system-view
[RouterC] ipv6 route-static 120:: 64 13::1
[RouterC] ipv6 route-static 121:: 64 10::102
# Configure IPv6 static routes on Router D.
<RouterD> system-view
[RouterD] ipv6 route-static 120:: 64 11::2
[RouterD] ipv6 route-static 121:: 64 12::1
Verifying the configuration
# Display BFD sessions on Router A.
<RouterA> display bfd session
Total Session Num: 1 Up Session Num: 1 Init Mode: Active
IPv6 Session Working Under Ctrl Mode:
Local Discr: 513 Remote Discr: 33
Source IP: FE80::1:1B49 (link-local address of Loopback1 on Router A)
Destination IP: FE80::1:1B49 (link-local address of Loopback1 on Router B)
Session State: Up Interface: N/A
Hold Time: 2012ms
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