[75987] in North American Network Operators' Group
Re: 16 vs 32 bit ASNs [Re: BBC does IPv6 ;) (Was: large multi-site
daemon@ATHENA.MIT.EDU (Jeroen Massar)
Mon Nov 29 13:08:40 2004
From: Jeroen Massar <jeroen@unfix.org>
To: Owen DeLong <owen@delong.com>
Cc: nanog@merit.edu
In-Reply-To: <2147483647.1101722285@imac-en0.delong.sj.ca.us>
Date: Mon, 29 Nov 2004 19:04:51 +0100
Errors-To: owner-nanog-outgoing@merit.edu
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On Mon, 2004-11-29 at 09:58 -0800, Owen DeLong wrote:
>=20
> --On Monday, November 29, 2004 5:41 PM +0100 Jeroen Massar=20
> <jeroen@unfix.org> wrote:
>=20
> > On Mon, 2004-11-29 at 08:35 -0800, Owen DeLong wrote:
> >> > Also, with 32bit ASN's, also expect upto 2^32 routes in your routing
> >> > table when each and every ASN would at least send 1 route and of cou=
rse
> >> > there will be ASN's sending multiple routes.
> >> >
> >> Only if EVERY ASN were allocated and active.
> >
> > *BUZZZ* ASN's are a globally unique resource, you not seeing it does no=
t
> > mean that it is not in use. For that matter anything from a prefix to a
> > ASN that any of the RIR's hands out does not have to show up on the
> > public internet, it could even be used by a single company internally,
> > just like RFC1918 prefixes, or on a VPN etc.
> >
> > <SNIP>
> >
> Duh... You're making my point for me. There won't be 2^32 routes from 1=20
> route per ASN unless ALL 2^32 ASNs are assigned.
You should indeed stop the drool&duh part as that is exactly not what I
wrote ;)
> Further, lots of ASNs get used for things that don't put routes in the=20
> global table. (If I can't see it, it's not in the global table).
>=20
> > Which damage might that be? The prefixes are not supposed to be put in
> > the global routing table and even if people did, with 16bit ASN you onl=
y
> > allow 65536 routes, which is less than current IPv4... oops let's
> > disable repeat mode... also see my nice comment on 6to4, that is more
> > useful if you want a globally unique /48 for sure, that is if you reall=
y
> > 'own' the IPv4 space of that prefix.
> >
> But, that "should" becomes a purely artificial barrier which will be
> eliminated by market economics. Finally, with the limitations of
> 16 bit ASNs (which we will surpass regardless of reclamation), we won't
> likely end up with 1 prefix per ASN. The prefixes will be out there
> regardless of the number of ASNs that end up originating them.
Which "should" might that be, you most likely cut it.
> > For that matter Ford and some other /8's are only 2002:13::/24, which i=
s
> > the same size as the 6bone space that was handed out early on. Do also
> > realize that if this all becomes a peep-up and the RIR's (or actually
> > IANA) runs out of space that they can try all over 7 more times, *that*
> > is how much IPv6 space is available.
> >
> And?
Stop the duh and read again ;)
Greets,
Jeroen
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