Is there a way to do this? The "monitor session" and "port monitor" commands aren't available on a UC520 running IOS 12.4(11)XW.
I just tested XW and XW6 and they both have the command on the router by default. I'm not sure what you may have configured on your router to prevent this. You are looking in global config mode right?
No. The switch on UC520 is a "dumb" one.