External Controller question

I am running a laptop with ONYX 4.6.1229, with Onekey (128 universe), I am connected to the house VIA Ethernet, using a total 4 universe and all works fine and well.
I need/want to connect an ETC color source AV 40, utilizing 4 universes to control multiple DMX functions through ONYX.
If I already have ONYX connected to the house using the Laptop ethernet “out” how can I connect the ETC controller ethernet to the already used laptop ethernet?
Do I need an ethernet switch and merge the controller?