Hi, I am in contact with a couple of network operators trying to prod them to deploy IPv6, I figured that 10 minutes to send a couple of emails was worth the effort to make them "see a customer demand" (now none of them can use the excuse that nobody has asked for it!), but the replies I got were less than impressive to say the least. I was wondering if you guys could summarise your experiences with people who make excuses for not deploying IPv6? I regularly see a specific person saying "we can't deploy it because X" followed by you guys "correcting them" and telling them how to deploy it without the problems they claim they will have, but that is only a small snapshot of the people who bother to post about their ignorance in public. I suspect there is also a lot of selection-bias in the NANOG membership base but you deal with a lot of enterprise networks off of this list so probably have broader experience than the NANOG archives. Can we have a thread summarising the most common excuses you've heard, and if they are actual problems blocking IPv6 deployment or just down to ignorance? Perhaps this could be the basis for an FAQ type page that I can point people to when they say they don't know how to deploy IPv6 on their networks? :) - Mike Jones