WPI published a guide for getting started with an Axis network camera, either the 206, M1011 or M1013. In their set of steps, an Arduino is not needed – the camera would connect to the robot’s network via ethernet.
You might also check out the Advanced session here (worked through an example):
This is using LV to do the vision processing (can be run on the roboRIO or another processor that can run LV - like a laptop). In the example, I’m using a USB camera, but if you go into the Vision.vi and change the select at the start from True to False, it will switch the camera address from Usb 0 to an IP address (just make sure this IP matches your camera).