I am collecting 540000 packets before I stop the capture. That is about 3 minutes, or so. The .ksh file on Aix 5.3 is this:

#!/bin/ksh

. $HOME/.profile

export DHSM=`date +%Y_%m_%d_%H`

tcpdump -c540000 -ien8 -w/tmp/tcpdump$DHSM.pcap host sequoia and not bml0028

the bml0028 machine is my Mac from where I ssh to the sequoia box.

The IO Graph has to do some calculation similar to (bits(t+dt)-bits(t))/dt where t is a given time and dt is a chosen time interval to provide a meaningful result. Of course I can awk the result and collect how many bits were transferred back and forth via the pipe in a given time interval - let say 1 second - and calculate the "velocity" of the bits at that particilar time of the capture, but IO Graph is already doing it, so I do not want to reinvent the wheel.

So the question is if I can tap into and get the Maximum bit rate for the duration of the capture.

Thanks a lot,

János