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

Mark Andrews <marka@isc.org> Sat, 03 June 2017 03:03 UTC

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To: Fernando Gont <fgont@si6networks.com>
Cc: Brian Haberman <brian@innovationslab.net>, ipv6@ietf.org
From: Mark Andrews <marka@isc.org>
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>
Subject: Re: draft-bourbaki-6man-classless-ipv6-00
In-reply-to: Your message of "Sat, 03 Jun 2017 04:40:27 +0300." <67a85067-2150-62cf-0eab-bca3d7827a4c@si6networks.com>
Date: Sat, 03 Jun 2017 13:03:14 +1000
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In message <67a85067-2150-62cf-0eab-bca3d7827a4c@si6networks.com>, Fernando Gon
t writes:
> Hi, Mark,
> 
> On 06/03/2017 03:35 AM, Mark Andrews wrote:
> > 
> > In message <d3558856-6faf-1d50-870a-c9db1e91e34c@innovationslab.net>, Brian
>  Hab
> > erman writes:
> >> Hi Bert,
> >>
> >> On 6/2/17 4:03 PM, Manfredi, Albert E wrote:
> >>> -----Original Message-----
> >>> From: Templin, Fred L
> >>>
> >>>> My meaning was for the ISP to give the cell phone or home gateway
> >>>> a /64, then let the cell phone/ home gateway subnet the /64 to
> >>>> the IoT devices within the subnetwork it provides as it sees fit.
> >>>
> >>> Sorry, I have to make an important correction:
> >>>
> >>> Presumably, using some sort of internal address format, also /64, such
> >> as privacy addresses? Yes, true, but ...
> >>
> >> I interpreted Fred's proposal as:
> >>
> >> 1. ISP gives the phone a /64
> > 
> > The ISP could give each phone a /48.  There is NOTHING stopping the
> > ISP giving a /48 today.  IPv6 is sized to allow this.  When you
> > stop trying to hand out the minimum and start handing out reasonable
> > quantities of subnets the so called problems go away.
> > 
> >> 2. The phone delegates longer prefixes to the devices behind it
> >> from the /64
> > 
> > The phone then hands out /64's to devices behind it on demand.
> 
> And such devices, if they feel like sharing, hand a...?

/64's on demand using PD.  This isn't rocket science.  ISP's handout
/48's.  Internally you handout /64's on demand and route each of
them individually.  DHCP-PD is designed to allow you to do this.

A /48 allow you to hand out 65000 /64's.

> >> 3. The ISP router has a single /64 route that points to the phone
> > 
> > The ISP's router has a single /48 that points to the phone.
> 
> At which point we probably should start thinking about ipng-bis :-).
> That's 16-bits away from IPv4, which has (or used to) /32 pointing to hosts.
> 
> Cheers,
> -- 
> Fernando Gont
> SI6 Networks
> e-mail: fgont@si6networks.com
> PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492
> 
> 
> 
> 
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org

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