When attempting to use the Fusion IPv6 Tool, I always get the message that a supported managed IPv6 capable modem associated with this service address.
Tech asked me to post here:
"I looked over our documentation, and checked your modem. The location for setting this up on your modem does seem different, and is missing the fields to setup IPv6. Can you post this on our forums at https://forums.sonic.net/ , as the folks who support the IPv6 functionally read and reply there."