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Re: [homenet] Let's make in-home ULA presence a MUST !?

Michael Richardson <mcr+ietf@sandelman.ca> Fri, 17 October 2014 15:45 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: "homenet@ietf.org" <homenet@ietf.org>
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References: <CAAedzxp1R-C5E9RJVMVLRJxPc0w4zooPtqnvWK9eggpZu4=xtg@mail.gmail.com> <C7F3DE60-F596-4BAD-9C28-74006966E5B9@fugue.com> <20141014142746.GX31092@Space.Net> <69B1F2CB-88C6-4211-83F3-11C8A3E7BFD2@fugue.com> <20141014145930.GY31092@Space.Net> <m1Xe3jL-0000I7C@stereo.hq.phicoh.net> <20141014154111.GZ31092@Space.Net> <C6760B68-C913-4B22-98E6-6D29A66F80D9@fugue.com> <20141015150422.GW31092@Space.Net> <4E2E154E-D231-4E79-860A-56948A13CDD4@fugue.com> <20141015154841.GY31092@Space.Net> <CBC8A3D9-9EBD-47FF-B066-247898FF2000@fugue.com> <543EA248.2080700@mtcc.com> <CB50B30B-DC36-4354-96B7-19AE415BD03F@fugue.com> <543EBE40.3030201@mtcc.com> <BA5ABBFA-9D13-4975-A96C-530FE958322A@fugue.com> <543ED2A7.3090409@mtcc.com> <1569644A-50C4-47B6-908E-262BC62BCD14@fugue.com> <543EFBF1.6040101@mtcc.com> <457D177C-232E-4590-A9ED-80048140157F@fugue.com> <CAKD1Yr1kix0HxWsC4n7ta4EG-6YhMMdYCTnFFXGb2ATQBbkMHA@mail.gmail.com> <DCB62D43-DFD3-4985-8FAA-896CEA3BD342@fugue.com> <CAKD1Yr3kJQetKzgYyZ1vpx KT31=wi NavxTM+WoUTg2gP5Dx4LQ@mail.gmail.com> <94C19398-AC5A-416F-8C3E-EA6B1750C22C@fugue.com> <CAKD1Yr1rpFeZuy=nXFSj+dpa749RhJJ2j9+U=cmFq_4cCsC_4g@mail.gmail.com> <4D6F2B13-D63E-4FEE-A136-B510126CC1C9@fugue.com> <2D09D61DDFA73D4C884805CC7865E61130EA3B9A@GAALPA1MSGUSRBF.ITServices.sbc.com> <1AA5DBBD-C3C5-4AFD-A043-6A69AE7FBDB9@fugue.com> <CAKD1Yr3Fa7hgXZReWFgmHA9pLnH=ezHLXh-aAdA-_N=AR3AiyA@mail.gmail.com> <3F36952F-CF6A-4F21-A713-A8A7DE7BDC42@fugue.com>
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Date: Fri, 17 Oct 2014 11:45:43 -0400
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Archived-At: http://mailarchive.ietf.org/arch/msg/homenet/uW4QpvFtACeppf_CcgAfnPV7sQI
Subject: Re: [homenet] Let's make in-home ULA presence a MUST !?
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Ted Lemon <mellon@fugue.com> wrote:
    > So this is why I am arguing that homenets SHOULD have ULAs, and why
    > Markus is arguing that they MUST.  We really do want hosts to prefer
    > the ULA if they can use it, and we really do want to always have a ULA.
    > Hosts that are communicating on intra-homenet should not be using GUAs
    > to do so, and it is worth a little effort to try to ensure that that is
    > the case.

Again, 7084 says ULAs are a SHOULD (I remembered a MUST).

In my mind, the kind of reason for a CPE device *NOT* to offer a ULA is because
the administrator typed in their own (provider independant) GUA over the ULA.

I.e. one of the 8 people in this conversation (perhaps the world) who
*actually* has their own allocation that they use in their home.. (not via a tunnel)
{my swap /24 is no longer at my home, and despite LRSA'ing it, I can't get my
own /40 from ARIN unless I'm willing to cough up $1250/year}

Perhaps there are other scenarios where the CPE needs to support turning off
the ULA generation and advertisement, but other than that, I read that SHOULD
as being pretty much a "MUST"

This is why I think the discussion is moot.

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-

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