I don't know if this is the right place to ask this, but since it involves traffic monitoring somewhat, I'm hoping someone here will have the answer. I am currently spanning a small VLAN (approx 15 switch interfaces) on a fairly low traffic lan back to an administrative interface (fe0/1). Now, my question is this: how do I know when I am over prescribing this port? I'm a bit of a Cisco newbie and am trying to figure out what counters on the "show interface FastEthernet 0/1" command will indicate lost packets due to spanning too much traffic back to this port. Does anyone have experience with this? Any pointers would be appreciated.