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

Brian E Carpenter <brian.e.carpenter@gmail.com> Sat, 10 July 2021 04:15 UTC

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Subject: Re: I-D Action: draft-carpenter-6man-rfc6874bis-00.txt
To: Nick Hilliard <nick@foobar.org>
Cc: Andrew Cady <andy@cryptonomic.net>, 6MAN WG <ipv6@ietf.org>
References: <20210706152527.j47rcxas5nwz5d63@zukertort.childrenofmay.org> <CA+9kkMDGQxFD6v=NJaDXRdRJ3jaRriTnhnyKeK3cG=jaosQhBQ@mail.gmail.com> <20210706161859.2wdw7mkeg4b7nd66@zukertort.childrenofmay.org> <28125.1625590441@localhost> <20210706170435.2dfvdx2aynpqxwl6@zukertort.childrenofmay.org> <24972.1625597141@localhost> <20210706200508.tc6tl4s7cqe4k3ga@zukertort.childrenofmay.org> <54007d49-0bb7-d97e-a7cc-6d6d982c0493@gmail.com> <CA+9kkMCOWVtjrZwrSp-qO9r4oOCSwm90sJ9NVb8uXDB3xraQWA@mail.gmail.com> <9cdae794-0f9d-1b40-9aac-7c09e604324a@gmail.com> <20210709051943.7p2jx6pfivujbrqp@zukertort.childrenofmay.org> <1532a3d8-2238-6d88-554a-b6c6f1becd07@gmail.com> <fcc60348-c755-9034-21c6-ff5e915b6ab8@foobar.org>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Message-ID: <1e53934e-663c-2531-21c1-5c41d438a305@gmail.com>
Date: Sat, 10 Jul 2021 16:14:54 +1200
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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