I have wireshark on a win 7 toshiba laptop plugged in to a hp procurve switch. I set the port the laptop is plugged in to as a 'monitor' port, monitoring all the other ports.
I have 1 other computer plugged in to the switch and then an uplink line to the rest of the network.
I am seeing traffic between the switch and the computer , switch and network, but no traffic to web sites or even to/from other machines on the LAN.
For example, if I access the http admin screens of the switch, I see that traffic.
However, if I access this site, I am not seeing that traffic.
Even between this machine which is running a web server and another machine running a web server on the LAN uplink I can not see any traffic when accessing using a browser.
It is almost as if I need to enable an additional setting somewhere to say 'show me uplink traffic too, not just traffic within the switch' ??