Matthew Ebert

I don't know the cause, but I can confirm that DHCP will fail for me about every other time I initialize a device, however the static configuration is reliable.

There is a configuration setting in utility/uipethernet-conf.h that can turn off UDP if you dont need it.

Not within the arduino IDE. You could try compiling the library with a different output file name and the correct value of the macro passed, then link to the new...

Without seeing your code, I am guessing that you're trying to use DHCP. That protocol requires UDP. Try compiling with a static address.