> Of course, the dual stack model only works while you still have enough > v4 space for one-per-customer. i.e. when you do not need it. that's a real seller. > It still boggles my mind that major ISPs failed to grok this in > time. The ISPs that did grok it are the ones happily running dual > stack. we deployed dual stack in 1997. i would not color us happy about this. randy