Even more confused. The Qualcomm card and Realtek dongle route produce the output below using route print -6. There were no other active routes listed.
1) For Qualcomm with access to
http://v6.testmyipv6.com/
C:\Users\john>route print -6
===========================================================================
Interface List
3...1c bf c0 8a 55 67 ......Qualcomm QCA9377 802.11ac Wireless Adapter
1...........................Software Loopback Interface 1
===========================================================================
IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
3 4131 ::/0 fe80::6203:47ff:fe49:5767
1 331 ::1/128 On-link
3 4131 XXXX:XXXX:XXXX:XXXX:/64 On-link
3 291 XXXX:XXXX:XXXX:XXXX:1830:390f:22d2:7c6/128
On-link
3 291 XXXX:XXXX:XXXX:XXXX:a0c8:9def:8707:f27d/128
On-link
3 291 fe80::/64 On-link
3 291 fe80::1830:390f:22d2:7c6/128
On-link
1 331 ff00::/8 On-link
3 291 ff00::/8 On-link
===========================================================================
Persistent Routes:
None
2) For the Qualcomm card after trying to access
http://v6.testmyipv6.com/ brings up a "We can’t connect to the server at v6.testmyipv6.com" screen:
C:\Users\john>route print -6
===========================================================================
Interface List
3...1c bf c0 8a 55 67 ......Qualcomm QCA9377 802.11ac Wireless Adapter
1...........................Software Loopback Interface 1
===========================================================================
IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
3 4131 ::/0 fe80::6203:47ff:fe49:5767
1 331 ::1/128 On-link
3 4131 XXXX:XXXX:XXXX:XXXX:/64 On-link
3 291 XXXX:XXXX:XXXX:XXXX:1830:390f:22d2:7c6/128
On-link
3 291 XXXX:XXXX:XXXX:XXXX:a0c8:9def:8707:f27d/128
On-link
3 291 fe80::/64 On-link
3 291 fe80::1830:390f:22d2:7c6/128
On-link
1 331 ff00::/8 On-link
3 291 ff00::/8 On-link
===========================================================================
Persistent Routes:
None
3) For comparison, the Realtek dongle with connection to
http://v6.testmyipv6.com/
C:\Users\john>route print -6
===========================================================================
Interface List
13...1c bf ce b5 8a 74 ......Realtek 8811CU Wireless LAN 802.11ac USB NIC
1...........................Software Loopback Interface 1
===========================================================================
IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
13 4131 ::/0 fe80::6203:47ff:fe49:5767
1 331 ::1/128 On-link
13 4131 XXXX:XXXX:XXXX:XXXX:/64 On-link
13 291 XXXX:XXXX:XXXX:XXXX:4d6:45be:e1ed:7210/128
On-link
13 291 XXXX:XXXX:XXXX:XXXX:c5c6:cf47:87a7:ac91/128
On-link
13 291 fe80::/64 On-link
13 291 fe80::4d6:45be:e1ed:7210/128
On-link
1 331 ff00::/8 On-link
13 291 ff00::/8 On-link
===========================================================================
Persistent Routes:
None
Does that offer any clues to anyone?