[164057] in North American Network Operators' Group
Re: /25's prefixes announced into global routing table?
daemon@ATHENA.MIT.EDU (Patrick W. Gilmore)
Mon Jun 24 14:54:41 2013
From: "Patrick W. Gilmore" <patrick@ianai.net>
In-Reply-To: <20130624192959.0a0c844f@tux.DEF.witbe.net>
Date: Mon, 24 Jun 2013 14:53:08 -0400
To: North American Network Operators Group <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Jun 24, 2013, at 13:29 , Paul Rolland (=E3=83=9D=E3=83=BC=E3=83=AB=E3=83=
=BB=E3=83=AD=E3=83=A9=E3=83=B3) <rol@witbe.net> wrote:
> On Fri, 21 Jun 2013 13:56:02 -0600 Michael McConnell =
<michael@winkstreaming.com> wrote:
>> As the IPv4 space get smaller and smaller, does anyone think we'll =
see a
>> time when /25's will be accepted for global BGP prefix announcement. =
The
>> current smallest size is a /24 and generally ok for most people, but =
the
>> crunch gets tighter, routers continue to have more and more ram will =
it
>> always be /24 the smallest size?
>=20
> Well, /25 are already in the routing table. I can even find a few /26 =
!!
>=20
> rtr-01.PAR#sh ip b | i /26
> *>i193.41.227.128/26
> *>i193.41.227.192/26
> *>i194.149.243.64/26
The question was when will we see /25s in the GLOBAL routing table. =
Despite the very un-well defined definition for "global routing table", =
I'm going to assuming something similar to the DFZ, or the set of =
prefixes which is seen in all (most of?) the transit-free networks[*].
Given that definition, there are exactly zero /25s in the GRT (DFZ). And =
unlikely to be for a while. Whether "a while" is "next 12 months" or =
"several years" is something I am very specifically choosing not to =
answer.
--=20
TTFN,
patrick
[*] Don't you hate the term "tier one" these days? It doesn't mean what =
it used to mean (i.e. _settlement free_ peering with all other tier one =
networks). And given that there are non-transit-free networks with more =
[traffic|revenue|customers|$WHATEVER] than some transit free networks, I =
prefer to not use the term.
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