Thu, Dec 11, 2014 at 02:45:00PM +1100, Mark Andrews: > Because most of the world has sat on its collective backsides until > it was too late to do a nice orderly dual stack deployment model > without having to share IPv4 addresses between customers. Now > many ISP's are just trying to keep IPv4 on life support long enough > to move everybody to IPv6. yawn. Much of the end-user equipment still does not support v6. Much of it has to be replaced with newer h/w for v6 support or support folks have to visit each site to perform upgrades (spendy). Many core devices still have partial or missing support. Some protocols still lack v6 support. Multihoming is looking rather ugly for small networks (like those with just 1 v4 /24, thus need less than a v6/48). usw. How much quicker do folks think implementation would have been by vendors, then adoption by users, had the ietf not felt obligated to rearchitect v4? vs. just expand the address space and ship it, which is the only area where v6 appears to shine anyway. [yes, I am ignoring the need for transition mechanisms] I don't know anyone enchanted by v6.