IPv6 woes - RFC

Sat Sep 18 20:25:40 UTC 2021

> As you noted John, its the plethora of software, support systems, tooling,
> and most important in many environments - legacy customer management and
> provisioning systems that can be the limiting factor. ...

Just looking around my office, I have a Cisco SPA112 two-port ATA.  It's 
been discontinued but Cisco says they will support it through 2025 and 
they shipped a firmware update in 2019.  It works fine on IPv4 behind a 
NAT. It has no v6 support at all and never will.  Multiply that by a 
zillion and you can see that IPv4 isn't going away any time soon.

Regards,
John Levine, johnl at taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly