How is it possible to analyze an Ethernet Network, especially for BACnet?
If you have to analyze an Ethernet Network, you have to connect the monitoring PC between the communicating devices. The easiest way to realize that is with a hub (which are no more available) or with a switch with a special monitor port.
The monitoring PC can only see the TCP/IP communication on his own Ethernet port.
When B is talking with C, A cannot listen to it because a normal switch do not forward each communication to all ports but only on the port where the dedicated receiver station is connected.
The solution is to use a switch with a monitor port. Any communication over this switch is mirrored on this special port like a hub.
You have to connect your analyzing PC to this monitor port and you will get all the traffic which go over this switch.
We recommend to buy a Netgear ProSafe GS 105E switch.
This smal switch has 5 ports, one of them is the monitor port.
It is easy to configurate with a Web-interface.
To analyze the TCP/IP traffic, we recommend to use the Wireshark software. See also FAQ 100569.
Communication / BACnet
Last update: 20.05.2015 13:44
First release: 14.09.2012 09:36