Trying on two model's of cisco switches to get a monitoring port working. I've found the cisco page to do this and according to it all that needs to be done is:
config mode choose the port you want to be the source port interface Fa0/1 or whatever
then choose the ports you want to monitor by:
port monitor fa0/2...
However i'm on a 3560 and the port monitor command isn't even an option at this point. Is there something needed to turn this on first?