[163993] in North American Network Operators' Group
Re: /25's prefixes announced into global routing table?
daemon@ATHENA.MIT.EDU (Owen DeLong)
Sat Jun 22 17:13:49 2013
From: Owen DeLong <owen@delong.com>
In-Reply-To: <51C60608.4030301@Janoszka.pl>
Date: Sat, 22 Jun 2013 23:08:40 +0200
To: Grzegorz Janoszka <Grzegorz@Janoszka.pl>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Jun 22, 2013, at 10:16 PM, 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.
>=20
Some ASNs will be more, some will be less. Since there's already some =
DDOS and such on IPv6, I would expect the current prefix table to =
include a reasonable example of all of the behaviors you describe.
Owen
