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RE: Running code (Was: I-D Action: draft-ietf-6man-ipv6only-flag-03.txt)

"Manfredi (US), Albert E" <albert.e.manfredi@boeing.com> Tue, 30 October 2018 17:56 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: Running code (Was: I-D Action: draft-ietf-6man-ipv6only-flag-03.txt)
Thread-Topic: Running code (Was: I-D Action: draft-ietf-6man-ipv6only-flag-03.txt)
Thread-Index: AQHUcFcpYquacc8opU6a6i/ZWJF0uqU4EEbQ
Date: Tue, 30 Oct 2018 17:56:08 +0000
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References: <CAFU7BASO_ByzbanhLKnWV280O_fASd-8W+ujpj3sN6d2-whw2w@mail.gmail.com> <CACWOCC-u7aAPwAOcixYvt2On=-o_8X25GhqdXTfA+tWRC1o2XA@mail.gmail.com> <3beca72e-19c5-10af-02e5-c21a90d77100@gmail.com> <20181019.223739.271916573.sthaug@nethelp.no> <4f58643c-272e-507e-3282-c87befd42395@gmail.com> <0927741c-4e8e-fcf7-ddd6-3ba500ba4c3d@si6networks.com> <7B48A11D-31DE-443C-B73A-14642EA0A397@jisc.ac.uk> <7526af75-4359-6fc6-e39b-eb94024a04de@si6networks.com> <E1BB1232-C1A2-496A-8157-0682D91EED42@steffann.nl> <5E75F3CA-F1D2-4F4F-9CF7-EEEE59634C1E@gmail.com> <C46C990E-0A4F-4731-8CB1-FD204858935E@consulintel.es> <9B53019C-3506-4C9E-AFCF-D6125FA1A65B@gmail.com> <1157b739-3a66-8d45-e3e1-e5f904dfb9bc@asgard.org> <a00607f9-7ced-f889-b5cb-c2fe16367d73@si6networks.com> <66759b73-0a22-e1a9-49db-21154e8e1267@gmail.com> <37ba23b3-df19-9c2a-bdbe-ba7a99d72d05@si6networks.com> <0d6008a4-337b-2ccb-2d9f-837f786eca65@gmail.com> <bfa4397a-aa7a-1184-4147-4cbfbfd13603@si6networks.com> <8C587906-F0EE-4A61-9046-2BF AC52588C0@isc.org> <E8DE18B5-94FC-411C-A310-E49A382E0079@thehobsons.co.uk> <e0fa8fad1b4249c9af79788323b0a922@boeing.com> <3A03A073-72E2-43A8-90A4-5C29DF445361@thehobsons.co.uk> <27fdbd71125842d888c5136684bf6e7b@boeing.com> <9A4368D6-E4B1-474C-9838-B584AF6D70C8@thehobsons.co.uk> <m1gHUMI-0000I6C@stereo.hq.phicoh.net>
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-----Original Message-----
From: ipv6 <ipv6-bounces@ietf.org> On Behalf Of Philip Homburg

> My take on it:
>
> 1) If a host has a global IPv6 address and is unable to reach a DHCPv4
   server, then after a short while agressively reduce the rate of DHCP
   multicast messages
> 2) If a host has a global IPv6 address and it configures an IPv4 link local
   address then the host should consider only 169.254.0.0/16 to be 
   onlink.
>
> Note: this second requirement makes sure that any global IPv4 address that
the host knows or learns will not result in any traffic, because the host
does not have a default router.
>
> 3) If a host has a global IPv6 address and a link local IPv4 address then
   the host should agressively reduce the rate of any service discovery
   multicasts on IPv4.

DNS in IPv4 format might be a good hint too.

>From my standpoint, I have yet to see anything that the flag adds, that can't be done just as well, and less ambiguously, with heuristics. I'd like to see one scenario that the flag resolves, that can't be done otherwise. But this should be a good thing. It puts the onus on the people who are responsible. The responsibility of saving power should be on the guy designing that box, not on a net admin, who has his own interests.

Bert

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