Hi Jean Pierre
It was never activated by default on the business CPEs and everyone doing to needed to do it on purpose by entering the 6rd details. So hopefully those people had a firewall concept - but you never know. What makes me the most angry is that they switched it off without prenotice and there is no information about it anywhere, neither on the labs-page nor in the partner portal.
In fact, the 6rd solution was only implemented for residential customers, but was never thought to be used for SME products. It only worked by chance, as the Border Relays were reachable also from SME IP-ranges. We recently had to scale up the border relays, due to increased traffic (6rd works extremely well and is highly performant, it is about to be enabled for all residential customers by default). At the same time the Border Relays were placed at a different location in our network. This means that they are no longer reachable from the IP ranges of the SME customers. Hence the interruption, I'm sorry it cannot be made to work easily.
Either I have to switch to a SC wholeseller who offers native v6 or I shall be activating a few tunnels for those customers who are now deprived of 6rd. And I though Martin told us at a swinog event that 6rd > > was a permanent decision for SC's pppoe customers.
Again, IPv6 was never officially supported for SME products. An official PPPoE-based solution is being worked on, so I hope you activate a few tunnels in the meantime and we won't lose you as a customer.
Best regards, Martin