Machine A=XXXX:YYYY:ZZZZ:AE40              (A is software router)
Machine B=XXXX:YYYY:ZZZZ:9901::BDBD (eth0)  & XXXX:YYYY:ZZZZ:9901::B015(tun0)
Machine C=XXXX:YYYY:ZZZZ:7CFF::E205 (eth0)  & XXXX:YYYY:ZZZZ:7CFF::E555(tun0)
Machine D=XXXX:YYYY:ZZZZ:9900::XXXX:XXXX:XXXX:XXXX

XXXX:YYYY:ZZZZ:7cff::/64 via XXXX:YYYY:ZZZZ:9901::bdbd dev eth1  metric 1024
XXXX:YYYY:ZZZZ:9901::/64 dev eth1  proto kernel  metric 256
fe80::/64 dev eth0  proto kernel  metric 256
fe80::/64 dev eth1  proto kernel  metric 256
default via XXXX:YYYY:ZZZZ:9901::1 dev eth1  metric 1024

XXXX:YYYY:ZZZZ:7cff::/64 dev tun0  proto kernel  metric 1024
XXXX:YYYY:ZZZZ:9900::/64 via XXXX:YYYY:ZZZZ:9901::ae40 dev eth0  metric 1024
XXXX:YYYY:ZZZZ:9901::/64 dev eth0  metric 1024
fe80::/64 dev eth0  proto kernel  metric 256

XXXX:YYYY:ZZZZ:7cff::/64 dev eth0  metric 1024
XXXX:YYYY:ZZZZ:9900::/64 dev tun0  metric 1024
XXXX:YYYY:ZZZZ:9901::/64 dev tun0  proto kernel  metric 1024
fe80::/64 dev eth0  proto kernel  metric 256
default via XXXX:YYYY:ZZZZ:7cff::e555 dev eth0  metric 1024

traceroute -6 XXXX:YYYY:ZZZZ:9900::XXXX:XXXX:XXXX:XXXX
traceroute to XXXX:YYYY:ZZZZ:9900::XXXX:XXXX:XXXX:XXXX (XXXX:YYYY:ZZZZ:9900::XXXX:XXXX:XXXX:XXXX), 30 hops max, 80 byte packets

1  XXXX:YYYY:ZZZZ:9901::b015 (XXXX:YYYY:ZZZZ:9901::b015)  81.088 ms  81.302 ms  81.883 ms
2  XXXX:YYYY:ZZZZ:9901::ae40 (XXXX:YYYY:ZZZZ:9901::ae40)  82.584 ms  82.948 ms  83.395 ms

traceroute -6 XXXX:YYYY:ZZZZ:9900::XXXX:XXXX:XXXX:XXXX
traceroute to XXXX:YYYY:ZZZZ:9900::XXXX:XXXX:XXXX:XXXX (XXXX:YYYY:ZZZZ:9900::XXXX:XXXX:XXXX:XXXX), 30 hops max, 80 byte packets

1  XXXX:YYYY:ZZZZ:9901::ae40 (XXXX:YYYY:ZZZZ:9901::ae40)  1.072 ms  0.656 ms  0.553 ms
2  XXXX:YYYY:ZZZZ:9901::1 (XXXX:YYYY:ZZZZ:9901::1)  0.943 ms  0.866 ms  0.936 ms