Need some help....

I need to set up a 8 Catalyst system. I was doing some tests here at the shop, and i figure out need some help on the best set up for that.

I Do have several ArtNet Nodes. So I can connect them to DMX, and then they convert to ArtNet. So like 4 Artistic license 2 In Nodes, gives me 8 Inputs.
( i can use a 8 Inputs Node also ). But that is not a issue.

So I set up a Network, with all Macs and with the Nodes.
So far I have 8 computers flashing Gigabit, and 4 nodes flashing 10 Mb.
All works great. Network 2.0.0.1 and ON....

NOW - If I also set up the Catalyst to receive remote commands and SYNC ID at the Layer ONE for an example, and all other Cats to follow that. They stuck.
i know is a Network issue... this way I have Artnet and SYNC on the same Network. And get package lost, all kind of trouble.
With only ArtNet and DMX I am OK.

Then... I tryied to make a second Network ( second port of the macs), to transit only the SYNC beetween the macs.
BUT I figure out, they use whatever Network they want, so I get stuck.

Please any help on how make that work will be very apprecciated.

Thanks a lot