Re: want to randomly drop packets based on percent

From: Jan Engelhardt
Date: Mon Apr 17 2006 - 10:22:07 EST


>
> I'm using the 2.4.32 kernel with madwifi and iproute2 version
> 2-2.6.16-060323.tar.gz
>
> I wanted to insert artificial packet loss based on a percent so i found:
> network emulab qdisc could do it, so i compiled support into the kernel and
> tried:
> tc qdisc change dev eth0 root netem loss .1%

You could just use the 'random' match module from netfilter/POMng, but I
doubt it will compile out-of-the-box on 2.4.32. It would then be as simple
as
iptables -t mangle -I PREROUTING -m random --average 1 -j DROP

> I really only need to drop random packets being forwarded through ip_forward
> ... however randomly dropping any packet based on a % is sufficient so I
> figured netem would be great.

Jan Engelhardt
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