[arin-ppml] Why are ISPs allowed?
joey at spiretech.com
Mon Jan 26 22:50:31 EST 2009
On Sun, 4 Jan 2009, Randy Bush wrote:
> i just had a depressing private email exchange with your small and
> partially-clued isp. they felt that v4/v4/v4/v4 nat was the way to go
> because it was easier for them and easier for the customer. all i could
> say was that 'easier' might not be considering the customer support costs.
> the v6 end user experience today is not great. vendor support is
> mediocre, both for dual stack and for transition tools (siit/nat-pt).
> and the global infrastructure is often tunneled and tromboned. neither
> of these will be really fixed until there is financial pressure behind
> them. the market, not the mailing lists, rules.
i'll fess up to being that partially-clued isp. i didn't think that multilayer
nat is the right thing to do, but unless someone builds a good v6<->v4 nat
device, then multilevel nat is probably what will happen. it already happens
nowadays and people survive (think wireless gateway behind dsl gateway). my
research into the v6<->v4 nat state of affairs leads me to believe that
multilayer v4 nat is much better understood at this point.
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