Hi there to the list. I'm using netem in order to generate delays on localhost (doing research on TCP and congestion control stuff) but often the kernel hangs when setting and resetting the delay. One workaround is using UML and defining two taps, but it is an iptables hell. Moreover when using UML and pinging I see an RTT which is not consistent to what i set (it produce big oscillations in RTT even if i didn't set any rtt variance). Is anyone having such problems? Any workaround or patch to apply? Thanks in advance, Luca De Cicco - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html