Owen DeLong via NANOG wrote:
When your ISP starts charging $X/Month for legacy protocol support

Out of interest, how would this come about?

ISPs are facing ever growing costs to continue providing IPv4 services.

 Could you please be more specific about which costs you are referring to?

Costs of address acquisition
Costs of CGNAT systems in lieu of address acquisition costs
Costs of increasing support calls due to IPv4 life support measures in other networks.
etc.

 It's not like IP transit providers care if they deliver IPv4 or IPv6 bits to you.

True, but adding customers requires additional addresses at some point. IPv6 addresses are cheap compared to IPv4 addresses.

  As an aside, all this demonstrates quite well one of the impediments to accelerated IPv6 adoption:

  None of these costs apply to parties not growing or ones that are only growing withing their existing IPv4 allocation.

  The status quo does not promote IPv6 adoption, which is obviously a problem since transitioning to IPv6-only requires all parties to be aboard.

  I'll even add that there is a perverse incentive for ISPs and others to delay IPv6 adoption in certain segments. As there is a scarcity of IPv4, ISPs can charge a premium for access to IPv4 addresses, something you cannot do with IPv6. Furthermore as IPv4 blocks are acting like an appreciating asset, there is both an incentive to acquire more, regardless of need, and to hoard what you have, even if you don't need it. For cloud providers your IPv4 blocks become your moat.


- Jared

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