[10742] in North American Network Operators' Group
Re: NSPs and filters
daemon@ATHENA.MIT.EDU (Vadim Antonov)
Sun Jul 13 04:49:46 1997
Date: Sun, 13 Jul 1997 01:39:47 -0700
From: Vadim Antonov <avg@pluris.com>
To: jlewis@inorganic5.fdt.net, randy@psg.com
Cc: nanog@merit.edu
randy@psg.com (Randy Bush) wrote:
>So, at POP X, I take in maybe 100 prefixes, with maybe 1000 at some POPs.
>How do I build and maintain that filter list, and how long does it take each
>packet to get through it with a router that also does real routing?
That can be done, and is relatively easy. Not in cisco's or any other
hardware-assisted box, though (figuring out why is left as an
excercise to the reader :)
My estimate is that the total filtering overhead is at about 2.5% for
a "software" router. And, yes, i do plan to implement that kind of
filtering.
--vadim
PS. Hint: i described the technique for doing that in a mailing
list, year ago.
