RE: [LARTC] Measuring throughput

[Esteban Ribicic <eribicic@UolSinectis.com>]

Another way may be using iptables accounting..for example:

iptables -N udp-out
iptables -A udp-out -j accept

iptables -N udp-in
iptables -A udp-in -j accept

iptables -A input -p udp -j udp-in
iptables -A output -p udp -j udp-out

you can see this with:
iptables -L -n -v -x 

..i have some perl scripts to show that in graphs (rrdtool, gnuplot,
etc)...

saludos
Esteban.


On Thu, 2003-02-06 at 16:04, Patrick Nehls wrote:
> Install a program called nload or iptraf. Nload very simply gives you the
> current in and out of whatever interface your specify along with an average.
> Here's the command I use:
> nload -i 2048 -o 384 -s 9 -t 1000 -u k -U m eth0 eth1
> This tells to set the incoming graph at 2Mbit max, outgoing graph at 384kbit
> max, -s 9 smoother average bandwidth number, -u is traffic number units
> (bit/s, kbit/s, mbit/s, gbit/s), and -U is the units for the amount of data
> in/out. The m lets me see rates for eth0 and eth1 (multiple interfaces).
> 
> Iptraf is much more of a full featured network monitoring program and I
> highly recommend it as well as nload. Iptraf can give you the basic in/out
> stats of your network along with much more. I use iptraf when I want to
> monitor the bandwidth usage of a specific connection and nload when I want
> the overall picture of how much data is being transferred in and out.
> 
> Patrick
> 
> -----Original Message-----
> From: Kenneth Porter [mailto:shiva@sewingwitch.com] 
> Sent: Thursday, February 06, 2003 10:30 AM
> To: LARTC List
> Subject: [LARTC] Measuring throughput
> 
> 
> I'm running a game server which uses a lot of UDP traffic on a 4 Mbps
> connection. I'd like to figure out how much of that I'm really using
> (inbound vs. outbound) and I'd like to verify my bandwidth cap.
> 
> The host also runs a web and FTP server and I'm running wshaper to keep
> those from hurting game traffic. But I'm concerned that it might be
> artificially capping my bandwidth and that I might need to tweak it.
> 
> I've got ntop running (http://matureasskickers.net:3000/) and it tells me
> that in a massive game last night (50 players) I used 2.2 Mbps, but I don't
> know whether that's inbound, outbound, or the sum of both. Is there another
> tool better for this measurement?
> 
> I'd like to simulate lots of game traffic by flooding UDP packets out of the
> box (say, to my home system) to verify the bandwidth cap. What tool would be
> good for doing that? (The Slapper worm doesn't count! ;))
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-- 
Esteban Ribicic
Network Operation Center
UOL-Sinectis S.A.

Florida 537 Piso 6, Buenos Aires, Argentina 
+54-11-4321-9110 ext 2503
+54-11-4321-9107 Directo
eribicic@uolsinectis.com
www.uolsinectis.com

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