[164049] 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 10:27:28 2013
From: "Patrick W. Gilmore" <patrick@ianai.net>
In-Reply-To: <51C60608.4030301@Janoszka.pl>
Date: Mon, 24 Jun 2013 10:27:19 -0400
To: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Jun 22, 2013, at 16:16 , Grzegorz Janoszka <Grzegorz@Janoszka.pl> =
wrote:
> On 22-06-13 17:30, Owen DeLong wrote:
>> Looking at the number of autonomous systems in the IPv6 routing table =
and the total number of routes, it looks like it will shake out =
somewhere in the neighborhood of 3-5 prefixes/ASN. Since there are =
~35,000 unique ASNs in the IPv4 table, I figured simple multiplication =
provided as good an estimate as any at this early time.
>=20
> Deaggregating of IPv4 announcements is done for traffic engineering =
and
> to fight ddoses (just the attacked /24 stops being announced to
> internet). I think some people will just copy their v4 habits into v6
> and then we might have explosion of /48's.
> I wouldn't be so sure about just 3-5 prefixes/ASN.
Not that many people are de-aggregating in anticipation of the DDoS.
Temporary de-agg during DDoS is not relevant to discussions on global =
table sizes.
--=20
TTFN,
patrick
