[164041] in North American Network Operators' Group
Re: /25's prefixes announced into global routing table?
daemon@ATHENA.MIT.EDU (Masataka Ohta)
Mon Jun 24 07:05:25 2013
Date: Mon, 24 Jun 2013 20:04:23 +0900
From: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
To: nanog@nanog.org
In-Reply-To: <20130622051431.85077.qmail@joyce.lan>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
John Levine wrote:
> I realize it's not quite that simple due to issues of longer prefixes
> taking precedence over shorter ones, but it is my impression that
> there's a lot of sloppiness.
16M /24 is just a cheap 16M entry SRAM.
However, 16M /32 means 4G entry SRAM or 16M entry CAM.
16M entry with /40 or /48 prefix means 16M entry CAM, which is hard,
which is why IPv6 is hard.
Masataka Ohta
