HDBaseT is an evolving standard for running HDMI over typical Ethernet Cabling and connections. It is not meant to interoperate with an Ethernet Network. It is meant to use the commodity Plugs, wall plates and Cables that are easy to buy and install, rather than using an entirley new connection scheme. The equipment on your HDBaseT "network" needs to be ALL HDBaseT equipment. Connecting an Ethernet device on a HDBaseT network will cause the HDBaseT components to switch to “Ethernet Fallback Mode" (EFM) , which should do no damage, but will not support HDBaseT signals. The HDBaseT 1.0 spec is based on the "5Play" feature set.
1. Uncompressed HD video
2. All audio formats supported by HDMI
3. Device control: CEC, RS232, IR, etc
4. 100BaseT Ethernet
5. DC power for remote devices like HDBaseT receivers
Class A products generally support 5Play and a cable length of 100 meters. Class B or "Lite" products don't support Ethernet and are limited to 70 meters.
Further reading: HDBaseT - what is HDBaseT?HDBaseT.org FAQ