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Re: draft-bourbaki-6man-classless-ipv6-00

Lorenzo Colitti <lorenzo@google.com> Sun, 04 June 2017 13:02 UTC

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References: <20170602141112.x64nleqclygz7dwd@Vurt.local> <20170602141259.GD30896@gir.theapt.org> <CAKD1Yr0DtQYvCYLQexhXe_nhb5rjeyhnB4bCveqyO5Xbuwdg1A@mail.gmail.com> <20170602145655.msfjw35qhoev4sm2@Vurt.local> <CAKD1Yr3gqFgq3dxFaBEV++q5cgx1AHzFLGRJ50DYJjVE69C7iA@mail.gmail.com> <f2260ee557014429a1fef32de040547b@XCH15-06-11.nw.nos.boeing.com> <d62ce5e3ea0f486eb4c9d54609a86b24@XCH15-06-08.nw.nos.boeing.com> <04bdfdfe018145e6aedbaa62ed6cbfb0@XCH15-06-11.nw.nos.boeing.com> <78fe298cb5484d50a56cf6ed4ddafb54@XCH15-06-08.nw.nos.boeing.com> <6bba4c2b58964787860f2c7acf130959@XCH15-06-11.nw.nos.boeing.com> <d3558856-6faf-1d50-870a-c9db1e91e34c@innovationslab.net> <20170603003552.7A0327ADD848@rock.dv.isc.org> <67a85067-2150-62cf-0eab-bca3d7827a4c@si6networks.com> <CAKD1Yr1VMES3cdm6pWrgvoX5YxhwfEwQa+f=RSnsRsY95eC4kw@mail.gmail.com> <CAKD1Yr3cXwM+2TBnuq9rnVHKgR6QY9naXVqzxQV4Hw9uB8926g@mail.gmail.com> <CAKD1Yr3oSQfM+gPJzfpK3sagb456dWvC6ab7t4D=FnFuahHqLg@mail.gmail.com> <CAKD1Yr1ub3XRTJf_d+rzUYDkvb=-R75JdZBRgUVTZxfCmH5XCQ@mail.gmail.com> <CALx6S35Ye67CHmqDF0AW5SX_-P6p16A1i6pFp5nOUwRB-r_GPA@mail.gmail.com> <CAKD1Yr2T4Xu3_CCrCPoHSDC6L+U0HB9vNvXA0n2UPDxjiu0Vgg@mail.gmail.com> <CALx6S36SfkvmPpeOfrXLYUhjRusjOiimh8u1c-gtQ=wat2=u5g@mail.gmail.com> <CAKD1Yr3yzGqH5LfbB09iO81Fjbym1=gb=hijskdUSiTZWKX18w@mail.gmail.com> <1BE6C6B8-425A-47DC-AF10-506A52A2DA06@thehobsons.co.uk>
From: Lorenzo Colitti <lorenzo@google.com>
Date: Sun, 04 Jun 2017 22:02:20 +0900
Message-ID: <CAKD1Yr0t_X2d__C8j9se21CVHUEXZzoQNM_xnJgZN170OtpEhw@mail.gmail.com>
Subject: Re: draft-bourbaki-6man-classless-ipv6-00
To: Simon Hobson <linux@thehobsons.co.uk>
Cc: IETF IPv6 Mailing List <ipv6@ietf.org>
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On Sun, Jun 4, 2017 at 5:27 PM, Simon Hobson <linux@thehobsons.co.uk> wrote:

> So for example, here you are adamant that a device should not have to "ask
> the network" for more addresses. What about networks where there are other
> priorities, what if the operator of a network requires to track
> addresses/address usage for whatever reasons ?
>

Again, the answers are in RFC 7934. See section 9.1 which goes into some
detail on address tracking. But basically: tracking via DHCP is insecure
unless you have L2 security, and if you have L2 security, you may as well
use that to track addresses.

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