I want to monitor a port on this switch (gig 1/0/9) to port 1/0/48. I don't seem to have the option.
WS-C3750G-48TS 12.2(25)SEE C3750-IPBASEK9-M
load-balance Load Balancing metho
The correct command to use is "monitor session" under configuration mode.
Here is a configuration guide from cisco site.