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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