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Re: [v6ops] Routing /48s [ULA draft revision #2 Regarding isolated networks]

Brian E Carpenter <brian.e.carpenter@gmail.com> Wed, 28 May 2014 04:29 UTC

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Date: Wed, 28 May 2014 16:29:28 +1200
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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To: Lorenzo Colitti <lorenzo@google.com>
References: <8AE0F17B87264D4CAC7DE0AA6C406F453D8B6B9A@nkgeml506-mbx.china.huawei.com> <m261ks7xww.wl%randy@psg.com> <53840070.90801@gmail.com> <m2y4xn7wep.wl%randy@psg.com> <53840723.8010606@gmail.com> <CAKD1Yr1O_poMR200sjU=ttRvGaeQRkC1ZfXC0Ok4uQxdq3K=NQ@mail.gmail.com> <m2mwe37tbn.wl%randy@psg.com> <CAKD1Yr2t3-vxuG=iDi4biBNFpJwuzuHgfpB74i_uydWWRV7qZg@mail.gmail.com> <8AE0F17B87264D4CAC7DE0AA6C406F453D8B6E02@nkgeml506-mbx.china.huawei.com> <m2fvjv7q4h.wl%randy@psg.com> <m1WpDcc-0000BMC@stereo.hq.phicoh.net> <43BB867C-7BCA-45F6-8ADC-A49B34D6C0DC@nominum.com> <m1WpHrp-0000BQC@stereo.hq.phicoh.net> <9DB71B37-999E-4F7F-A7DA-6B243574E818@nominum.com> <2E2EC822-60EB-4B09-8BB3-D8FB098EB181@delong.com> <CD77B261-5F6F-4177-AA50-0B2DD3D15260@nominum.com> <B95BEA59-B1A2-4CEF-ACF4-63F65FB544AA@delong.com> <4FF6E348-6BB5-473A-8E94-4A3EE8BD32DC@nominum.com> <53855130.8040105@gmail.com> <CAKD1Yr0JP=RCBJ5Pn=wRHLJodyA2w1+a+XqaiJ-Wf9-oNE0acA@mail.gmail.com>
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Cc: Philip Homburg <pch-v6ops-3a@u-1.phicoh.com>, v6ops WG <v6ops@ietf.org>
Subject: Re: [v6ops] Routing /48s [ULA draft revision #2 Regarding isolated networks]
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On 28/05/2014 15:12, Lorenzo Colitti wrote:
> On Wed, May 28, 2014 at 12:00 PM, Brian E Carpenter <
> brian.e.carpenter@gmail.com> wrote:
> 
>> Let's assume a paltry 5 billion homenets, each with a routed /48.
>>
>> Well, today BGP-4 has 17687 entries for IPv6, according to
>> http://bgp.potaroo.net/v6/as2.0/index.html
>> It will be interesting when that number changes to 5000000000.
>>
>> Somehow I doubt this will happen. Quite how far we go in that
>> direction is an interesting question.
>>
> 
> You don't need ULA to solve this. homenet is solving this problem using
> source+destination routing.

Indeed, and not just homenet. I just wanted to remind people that prefix-per-site
has a scaling issue. That's why I changed the Subject:.

On the other hand, and I speak from experience, persuading IT departments
to support SADR is harder than persuading them to allow multiple prefixes.

    Brian

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