On Tue, 01 Feb 2011 10:27:45 -1000, Paul Graydon said:
We're still using v4 because we can, because there has been no compelling business case to justify spending time on something that isn't necessary just right now, especially given the not insignificant changes between v4 and v6. There is nothing on line that isn't accessible over IPv4 so there has been no critical app outside the infrastructure to spur such changes yet either.
And if you're not working on deploying IPv6 now, will you be able to survive the delay when something critical *does* come online and you need 18 months or whatever to deploy? Heck - we started deploying in Feb 1997 or so, and as I write this, MRTG is reporting that about 5% of our off-campus traffic is via IPv6 - probably due to the fact that we hit Google and Youtube that way. But we *still* have gear and software that doesn't play nice (though almost all of that is our own internal headaches and not very visible to end users - their connectivity works).