>>> .       RFC6204 (Basic Requirements for IPv6 Customer Edge Routers) * =>
>>> RFC7084 and requires CE-Router Logo <image001.png>
>> 
>> the delta between 6204 and 7084 is largely the addition of the 6rd and 
>> DS-lite.
>> since 7084 was published quite a lot has happened on new mechanisms for IPv4 
>> address sharing. e.g. MAP. I would think 554bis should take those into 
>> account as well.
> 
> This is an interesting discussion. MAP and LW4o6 would be interesting 
> mechanisms to require support for, absolutely. I am not sure how much of the 
> control plane for these mechanisms that are actually done and in published 
> RFCs yet, but will look into it!
> 
> It's hard to require support for something that might not be 100% done and 
> deployable using available RFCs, even though there are multiple 
> implementations of these already.

the MAP and LW4o6 document series are stable and should be published as RFCs 
real soon now. all are at "Approved - announcement to be sent". 
https://datatracker.ietf.org/images/iesg-draft-state-diagram.png

there are at least eight IETF solutions (L2TP, DS-lite, 464XLAT, Public 4over6, 
Lightweight 4over6, 4rd, MAP-T, MAP-E) to the same problem (IPv4 or shared IPv4 
over IPv6). it's going to be interesting to figure out how 554bis should deal 
with that.

cheers,
Ole

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