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Re: Confirmation to advance: draft-ietf-6man-ipv6only-flag-05

Sander Steffann <sander@steffann.nl> Mon, 27 May 2019 23:04 UTC

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Subject: Re: Confirmation to advance: draft-ietf-6man-ipv6only-flag-05
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From: Sander Steffann <sander@steffann.nl>
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Date: Tue, 28 May 2019 01:04:33 +0200
Cc: Nick Hilliard <nick@foobar.org>, 6man WG <ipv6@ietf.org>
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References: <F8BFFCAD-E58E-4736-8A1C-56579B6F6032@employees.org> <232c1a43-0fd9-4eae-737b-260a3906f72a@gmail.com> <663F6C0B-7B8A-4088-B9C0-B2867B0C3EB8@gmail.com> <CAN-Dau3VJN7qNHAW-yStMrDRCa4vsDs2ObkAxswnYbcHde2t_w@mail.gmail.com> <m1hPqHO-0000J8C@stereo.hq.phicoh.net> <CAN-Dau3R=4JbcbK7tWkJKYzVjq7DvAAEjVsbCLbZdYYO8OJ0YA@mail.gmail.com> <m1hQ7Dm-0000M3C@stereo.hq.phicoh.net> <CAN-Dau040j6U+1CCn0QJiVMy2nVShHqqSFdCkM-FbMAH-2wjRA@mail.gmail.com> <m1hQCYr-0000KBC@stereo.hq.phicoh.net> <561d9dc3-c769-c774-8f65-f975ac2a10a0@gont.com.ar> <m1hT1DZ-0000HEC@stereo.hq.phicoh.net> <ce07ade8-5105-055f-4798-f4ef20a2393c@si6networks.com> <CAN-Dau02MYCrKx2BgyuYJeHBdoz6SHCnp+-byM+LMM8af0S+rA@mail.gmail.com> <40e99171-6dda-29e3-6152-da5ca5219ed9@foobar.org> <CAN-Dau0ALqfAA-Dz56oHAfOtY7E2obx5E7TgoeH357Mckp3t9g@mail.gmail.com> <093ba8e2-6f0a-4c91-9df1-cda33fffea97@foobar.org> <CAN-Dau3kVqb+ZEHB7iPGeRuq1Mu8UHR3FEZv8SgmiqZexaFhuA@mail.gmail.com> <12db9629-f92a-e12a-5ff1-7db2c5d2137e@foobar.org> <374F009B -98E1-40D0-AC0D-1C82CBE378BD@steffann.nl> <CAN-Dau0EGN+bLZCTA-A4ksd40KprhKn-HkL4gotG=v-=kD0zrg@mail.gmail.com>
To: David Farmer <farmer@umn.edu>
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Hi David,

This is starting to feel like a personal attack...

> Then stop telling people to filter Ethertype 0x0800 because you can't use RFC2563 in the presence of such filters.

Those are different options, depending on your situation.

> Further, there really aren't IPv4 clients and separate IPv6 clients anymore, just about everything that matters is dual-stack.

Of course.

> So you are really saying, tell dual-stack clients to not use IPv4 using IPv4. So who is the purist? You're saying you can't block IPv4 because you have to use IPv4 to tell dual-stack clients they shouldn't use IPv4, now that's a catch 22.

Block the ethertype if you don't want any traffic, use the DHCP option if you want to explicitly inform clients, I don't care. There are plenty of options.

> Again this is a real problem is some at least a few situations, and they are fairly common situations, just not in the home broadband world at least today.

And there are solutions already available. Just pick one instead of inventing a new one...

Cheers,
Sander

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