Hey Richard, I am curious to some of your statements and would love it it you could clarify what you mean. I'm a little confused.

Quote Originally Posted by samsc View Post
...a problem if another device senses with a different delay...
What do you mean by senses with a different delay? Are you referring to issues with packet collisions?

Quote Originally Posted by samsc View Post
then the autonegotiate can get in the way
Are you referring to auto-negotiate in Catalyst or from a switch?

Quote Originally Posted by samsc View Post
i suggest when using dumb artnet boxes always using a hub
Do you mean using a hub as opposed to a switch? Or do you mean using a hub as an intermediate step between the MAC and the Artnet device?

A couple other questions...

  1. Is there a way to adapt the software where a user can choose which Ethernet port?
  2. How about a way to use Catalyst as a DHCP server?
  3. How about a way to narrow Catalyst Control so it's not a full subnet multicast?