--- gert@space.net wrote: From: Gert Doering gert@space.net On Sun, Oct 29, 2017 at 12:57:54PM -0700, Scott Weeks wrote:

Yeah, it's quite unfortunate that IPv4 ran out so suddenly, barely 15 years after people were told to move towards IPv6.

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Especially after IETF made it backwards compatible and made it so easy to switch from 4 to 6... ;-)

There's no way to make "something with longer addresses" compatible without IPv4 without changing everything (routers, endpoints) - so, that argument is usually one brought forward as one of a long list of standard excuses to avoid deploying IPv6, while at the same time blaming everyone else for the problems with IPv4. -------------------------------------------

Note the smiley face above. This one, too... :)

I was not around for those discussions (and not being a computer science person, nor wanting to go on this for too long as has been endlessly done on other lists), but it seems TLV would have allowed 4 to be a subset of the new space. I never heard that discussed much and that's what I meant by my comment.

scott