![](https://secure.gravatar.com/avatar/b8711b1eba1769ac2c2ee929dbf874ce.jpg?s=120&d=mm&r=g)
However, I'm still interested in the v6 DSL access question. If it works down there the way it works up here, then the L2TP session isn't established between the ISP's LNS and a customer device, but rather between the ISP's LNS and a tunnel switch within Telecom's network that also terminates the PPPoA or PPPoE session from the customer.
Hmm, actually the more I think about it you are correct, I doubt it would work. Anyone who has a working UBS setup care to try it ?
If that's right, then unless that tunnel switch is spectacularly transparent with respect to encapsulated frame (and maybe it is) then some explicit v6 support seems like it is required within Telecom's network for v6 customer access to work.
Of course someone with spare time could just try this out and answer the question authoritatively by telling me that they just tried it, and it works :-)