Re: [v6ops] reclassify 464XLAT as standard instead of info

[Gert Doering <[e-mail]>]

Hi,

coming back from my old man's rant (apologies) to the original question...

On Fri, Sep 22, 2017 at 01:55:24PM -0400, Lee Howard wrote:
> As to the original question, I have a couple of questions:
> 
> 1. What is gained by promoting rfc6877 "464XLAT: Combination of Stateful
> and Stateless Translation????  Regardless of whether the correct promotion
> path is BCP or Proposed Standard, what is the goal?

I do not think much is to be gained.  Implementations already exist,
so pointing to a BCP and asking vendors to "you want this, it's BCP!"
(or "Standard") isn't going to change much.  CPE vendors will add 
it if you wave money at them, and not otherwise, no matter what label
it carries.

> 2. rfc2026 ???The Internet Standards Process???  says a BCP is the "best
> current thinking on a statement of principle or on what is believed to be
> the best way to perform some operations.???  What principle or what
> operations is 464xlat best for?

464xlat is one possible approaches to enabling IPv4-to-IPv4 connections
across an IPv6-only network that provides NAT64 services and no tunneling
services.  So if you have a NAT64 / IPv6-only network already and have 
to care for IPv4-only applications, this might be the best approach.

If you need to transport IPv4 across an IPv6-only network and do not yet
have a NAT64 to use, one of the MAP-E/MAP-T stateless "transport" variants 
might be a *better* solution, given the statelessness of the MAP gateway.

So it depends on your network: if you want "IPv6-mostly" with a bit of
remaining external IPv4 to be handled by the DNS64/NAT64, and a few stubborn
applications insisting on literal IPv4 on the client side, 464xlat is
"best".  Otherwise, maybe not "WCP", but definitely just "one solution in
the toolchest"

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

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