It's ideal to have them both using Ethernet ports. The AV2 doesn't come with one out of the box. You can get either the C2ENET-1 or C2ENET-2 cards for it.
I've only dealt with the Rack2 once, but I know it doesn't have one out of the box either. On the web page Crestron shows the Rack2 with a CNXEN-2 Ethernet card in it here
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| View on www.crestron.com ?? ? | Preview by Yahoo |
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If you have these cards in your systems you can either do Ethernet Intersystem communications or you can program one of them and in the system configuration you can add a Ethernet Remote Processing module for the appropriate system you want to slave to the master. In the later case you can make either one of them run the code.
