At present I use OP Manager to monitor my LAN. Sadly at present we have a very flat LAN in a single VLAN. I am looking at splitting up the LAN into multiple VLANs. I can easily route between the VLANs this has been tested. What I would like to do is to benchmark the current VLAN utilisation for broadcasts, multicasts, etc... start to migrate servers to the new VLANs and then benchmark again once I have finished. I can't really do this with OP Manager. Does anyone have any experience of using other tools to capture and model this data.