Question : Ethereal; Capturing traffic on a particular port

Ethereal 0.10.11 on Windows XP Pro
Cisco Switch 2900
Ethereal System on port 16
System I want to capture traffic on port 23

Basically I need help on configuring Ethereal so I can monitor traffic on port 23. Not sure if I'm to configure Ethereal to capture traffic by port, MAC address or IP.

Thanks in advance

Answer : Ethereal; Capturing traffic on a particular port

If it's a 2900 (and not a 2950) then the commands for the 2900 look like this:

config t
int fa0/16
port monitor fa0/23
exit
exit

All traffic from port 23 should now show up on port 16 as well, so Ethereal can see it.