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

Sander Steffann <sander@steffann.nl> Tue, 28 May 2019 00:06 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 02:06:08 +0200
Cc: David Farmer <farmer@umn.edu>, 6man WG <ipv6@ietf.org>
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References: <F8BFFCAD-E58E-4736-8A1C-56579B6F6032@employees.org> <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> <F6F0C9DC-545E-4FE5-BB4C-55BB29022E84@steffann.nl> <e19 1d0f2-235b-bc97-2a02-878783c4c308@gmail.com>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Hi Brian,

> Well, yes. But if an operator chooses to filter 0x0800 and wishes to actively
> inform hosts that IPv4 is unavailable, only an IPv6 mechanism can do so.
> So here we are.

Why would an operator choose that? What operational problem is being solved?

Cheers,
Sander

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