I need to monitor traffic on a Voice deditacted Vlan my network. I have set up a port on a 2980 switch with the following command:
set span 11(vlan) 2/28 and have connected a desktop to this port and am running ethereal on it but i am not getting any traffic for this vlan. We are having trouble with voice call on this vlan so i think something is causing excess traffic to occur.
Any idea what i'm doing wrong here not to be seeing any traffic? when there definatley is traffic on it?