Re: I-D Action: draft-carpenter-6man-rfc6874bis-00.txt

[Brian E Carpenter <[e-mail]>]

On 10-Jul-21 09:35, Nick Hilliard wrote:
> Brian E Carpenter wrote on 09/07/2021 22:32:
>> We really need to hear from implementers about this. Assuming that we
>> have a constructive discussion during the upcoming 6MAN session,
>> outreach to implementers should be the next step, IMHO.
> 
> Microsoft seems to have dealt with this problem already:
> 
>> https://docs.microsoft.com/en-us/windows/win32/wininet/ip-version-6-support
> 
> tl;dr: windows requires "%25" instead of "%" as the scope delimiter.

Sure, but not everywhere, e.g. not in the "DOS" command prompt. So you get the rather alarming result that in some contexts (e.g. ping) fe80::abcd%25 works if you have an interface #25, but in other contexts you must use [fe80::abcd%2525]. 

I just checked, and Internet Explorer (yes, it lives) does still accept http://[fe80::2e3a:fdff:fea4:dde7%257], but rejects http://[fe80::2e3a:fdff:fea4:dde7%7]. But other browsers on the same machine (including MS Edge) refuse to parse the zone index, of course.

>From the user's PoV this is not ideal.

   Brian