Re: [v4v6interim] Can we squeeze a tiny topic in the agenda?

[Mark Townsley <[e-mail]>]

Coming from RIPE, I'd like to know if you have seen this draft, and what 
you think of the idea.

http://www.ietf.org/internet-drafts/draft-shirasaki-isp-shared-addr-00.txt

This draft plainly argues against using 240/4 (on the basis that it is 
already too "polluted" in IP stacks today), and instead asks IANA to set 
aside some new space for SPs to "share" within NAT zones or walled gardens.

But aside of whether 240/4 is used or not, I'd like to know if the 
community believes we need to define some IPv4 "SP Private" space 
(presumably to sit between two NATs, or to communicate to devices within 
an SP walled-garden). If we as a community decide that this kind of SP 
space is needed, we are effectively defining a new scope that is 
different from RFC1918 scope and global scope. As such, our evaluation 
criteria for how 240/4 could be used changes by default - as we have a 
new type of scope to consider.

I don't think this is a tiny topic, but it is one that could become an 
elephant in the room if we don't put it on the table and discuss it a 
bit. I think it at least falls under the "SP's running out of RFC1918 
space" problem space scenario, and how to deploy NAT444 CGNs in the 
solution space.

Thanks,

- Mark

Andrei Robachevsky wrote:
> Colleagues,
>
> I know the agenda is already very full, but I wonder if we could squeeze
> a small topic.
>
> Coming from the RIR side I'd like to bring up an issue of usability of
> the former class E space (240/4). I know many are sceptical about this,
> but I am not aware of any more or less comprehensive usability tests.
> I'd like to discuss the feasibility of such experiment.
>
> I think this is relevant to this meeting, because if usable this space
> could be a very good candidate for some of the translation proposals
> being discussed here.
>
> It's only a few slides.
>
> Thanks,
>
> Andrei Robachevsky
> RIPE NCC
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>   

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