S7300-Ethernet interface

Hey all,
I'm looking for a solution to interface a couple of S7-300's to an ethernet network so we can collect some data. We will be using Inductive Automation's Ignition OPC driver to something like the following:
http://www.ttintl.com/english/s7_link.html
http://www.helmholz.de/prod.d,80_92_93.html?p_id=142
Does anyone have any experience with units such as these?
Thx

router

Hello,

Depending on the environment and application, you could use a simple router, maybe even a switch. But of course, if you need something more robust with more features for automation purposes, there are quite a few options out there.

But, I have only been told about solutions. Never played with them myself.

May I suggest VIPA teleservice modules which add some functionality to your setup.
http://www.vipa-usa.com/products/accessories/teleservice/
http://www.vipa-usa.com/uploads/tx_sbdownloader/DB_Teleservice_04_2010_ENG_web_01.pdf

Hello you can use the smallest interface gateway S7-LAN. This brings TCP/IP to each kind of S7-PLC.
Here you get information or at site http://www.1a-plctools.com