Server behind Cisco router - bad performances

2010-02-09 Thread Sebastiano Pomata
Hi all, back again trying to debug causes of bad performances in my lab's network. I tried to place two boxes behind a Cisco router (no information on model, sorry), the first with OpenBSD 4.6 and the second one with Linux Ubuntu 9.04. I used iperf to measure bandwidth, in particular the two

Re: Server behind Cisco router - bad performances

2010-02-09 Thread Christiano F. Haesbaert
When you use UDP, you're seeing the results on the client or in the server ? iperf uses busy-waiting to implement flow-control in UDP, so basically if you specify an absurd rate transfer, the client will try to deliver at that rate and packets will be dropped. If you do specify a rate consistent

Re: Server behind Cisco router - bad performances

2010-02-09 Thread Sebastiano Pomata
On Tue, 2010-02-09 at 14:32 -0200, Christiano F. Haesbaert wrote: When you use UDP, you're seeing the results on the client or in the server ? iperf uses busy-waiting to implement flow-control in UDP, so basically if you specify an absurd rate transfer, the client will try to deliver at that