I am still a little confused about adding a hwic to my 2821 router for more ethernet ports. I have learned that the switch ports on this module do support L3 but only when assigned to an SVI. My questions come into play when a device is connected to the switch ports. say i have the SVI with an ip of 10.0.0.1 and the connected device with an ip in the same subnet. when i plug into one of the switch ports the device is going to be able to talk just as if I had supplied the ip directly on the interface as the onboard interfaces work correct? otherwise, whats the use?