Emulating a cellular interface

Sat Nov 6 23:22:24 UTC 2010

Or Linux Netem

http://www.linuxfoundation.org/collaborate/workgroups/networking/netem

Suresh


On Sat, Nov 6, 2010 at 6:50 AM, Andy Davidson <andy at nosignal.org> wrote:
>
> 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