[109934] in North American Network Operators' Group
Re: Gigabit Linux Routers
daemon@ATHENA.MIT.EDU (Florian Weimer)
Wed Dec 17 10:23:57 2008
To: Eugeniu Patrascu <eugen@imacandi.net>
From: Florian Weimer <fweimer@bfk.de>
Date: Wed, 17 Dec 2008 16:23:44 +0100
In-Reply-To: <4949101C.1000108@imacandi.net> (Eugeniu Patrascu's message of
"Wed, 17 Dec 2008 16:43:40 +0200")
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
* Eugeniu Patrascu:
> You can also use a kernel with LC-Trie as route hashing algorithm to
> improve FIB lookups.
Do you know if it's possible to switch of the route cache? Based on
my past experience, it was a major source of routing performance
dependency on traffic patterns (it's basically flow-based forwarding).
Anyway, with very few flows, we get quite decent performance (several
hundred megabits five-minute peak, and we haven't bothered tuning
yet), running on mid-range single-socket server boards and Intel NICs
(PCI-X, this is all 2006 hardware). We use a router-on-a-stick
configuration with VLAN separation between all hosts to get a decent
number of ports.
My concern with PC routing (in the WAN area) is a lack of WAN NICs
with properly maintained kernel drivers.
--=20
Florian Weimer <fweimer@bfk.de>
BFK edv-consulting GmbH http://www.bfk.de/
Kriegsstra=DFe 100 tel: +49-721-96201-1
D-76133 Karlsruhe fax: +49-721-96201-99
