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

"Manfredi (US), Albert E" <albert.e.manfredi@boeing.com> Sat, 11 May 2019 23:45 UTC

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From: "Manfredi (US), Albert E" <albert.e.manfredi@boeing.com>
To: Philip Homburg <pch-ipv6-ietf-6@u-1.phicoh.com>, "ipv6@ietf.org" <ipv6@ietf.org>
Subject: RE: Confirmation to advance: draft-ietf-6man-ipv6only-flag-05
Thread-Topic: Confirmation to advance: draft-ietf-6man-ipv6only-flag-05
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Date: Sat, 11 May 2019 23:45:31 +0000
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-----Original Message-----
From: ipv6 <ipv6-bounces@ietf.org> On Behalf Of Philip Homburg

> This draft adds almost nothing over what can be achieved with a few
heuristics.

+1.

(In case some have the mistaken notion that only a couple of stray cats are opposed.)

There will no doubt be a time when equipment vendors will leave IPv4 off by default, and only turn it on if there's some site that can't be reached with IPv6. Like, DNS only sends an A record. That time will come with or without this flag.

I totally agree with those who say that "this flag adds a heuristic." But what bothers me more than a little is, is that reason enough? To merely add a heuristic to a bunch that already exist, requiring a change to the protocol? And perhaps more problematic, to change a protocol to suggest a totally different protocol should be disregarded? What next?

Thinking of this in terms of religious fundamentalism, it sounds quite politically incorrect! ;)

Bert

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