[132005] in North American Network Operators' Group
Re: Emulating a cellular interface
daemon@ATHENA.MIT.EDU (Henry Linneweh)
Wed Nov 10 18:52:31 2010
Date: Wed, 10 Nov 2010 15:51:36 -0800 (PST)
From: Henry Linneweh <hrlinneweh@sbcglobal.net>
To: Andy Davidson <andy@nosignal.org>, Saqib Ilyas <msaqib@gmail.com>
In-Reply-To: <75424723-658C-4E2C-88E6-D8D12C686080@nosignal.org>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
here are some modules that might help
http://www.pwsstore.com/cellularembeddedmodules.aspx
-henry
________________________________
From: Andy Davidson <andy@nosignal.org>
To: Saqib Ilyas <msaqib@gmail.com>
Cc: nanog@nanog.org
Sent: Sat, November 6, 2010 5:50:20 AM
Subject: Re: Emulating a cellular interface
On 6 Nov 2010, at 05:53, Saqib Ilyas wrote:
> A friend of mine is doing some testing where he wishes to emulate a
> cellular-like interfaces with random drops and all, out of an ethernet
> interface. Since we have plenty of network and system ops on the list, I
> thought we might have luck posting the question here. Is anyone aware of a
> simple tool to do this, other than rather involved configuration of
> iptables?
Not withstanding Mikael's comments that it shouldn't be lossy, at times when you
want to simulate lossy (and jittery, and shaped, and ....) conditions, the best
way I have found to do this is FreeBSD's dummynet :
http://www.freebsd.org/cgi/man.cgi?query=ipfw&sektion=8#TRAFFIC_SHAPER_(DUMMYNET)_CONFIGURATION
Andy
