Re: [IPv6] [Last-Call] Artart last call review of draft-ietf-6man-rfc6874bis-02

Brian E Carpenter <[email protected]>
Newsgroups gmane.ietf.apps-discuss,gmane.ietf.ipv6
Message-ID <[email protected]>
On 27-Mar-23 11:23, Rob Sayre wrote:
> On Sun, Mar 26, 2023 at 3:01 PM Brian E Carpenter <[email protected] <mailto:[email protected]>> wrote:
> 
> 
>     If the parser experts were saying 'we cannot parse it with the "%" but we could parse it with the "-"', that would change the discussion, but we've never heard that.
> 
> 
> You can do either. I've written a few of them. But the argument here is about parsers that are not going to be changed. So, then you have a dilemma. I don't even feel strongly, but this syntax will break a lot of them. That's all it is.

In what way does it "break" existing parsers? They simply return an error. Why is that a problem? As discussed at https://www.ietf.org/archive/id/draft-ietf-6man-rfc6874bis-05.html#section-4-1, this is completely compatible with stepwise deployment as and when needed.

Yes, it becomes a feature request for existing parsers. And it will only get implemented when the need is irresistible. No different from any other feature request.

    Brian

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