I'm working with a colo, so I have limited "access" into the network port itself. All I want to do, is set a SPAN port for a VLAN on a Cisco 2900, then have a Linux box monitor that port, and OF COURSE still be accessible from here at our location. They already moved the port and made it a SPAN port, but NOW I can't get to the computer. I'm not sure what's the deal. It's like they're setting up out-of-band SPAN somehow? I just want in-band same traffic to get to the computer as the SPAN. Is that OK? Does that work? Do I NEED another network port? If so, do I set anything on the SPAN port or just leave it without IP or anything?
So... I'm asking about setting up a SPAN port for a computer with one network interface basically.