Hi Bill
Have a chat with the good folks at the small business support center, regarding mirroring LAG interfaces
http://www.cisco.com/en/US/support/tsd_cisco_small_business_support_center_contacts.html
But I gotta say, I have had a look at three locations;
- the online SG300 switch emulator and the
- picked through the "maintain and operate guide" and it keeps suggesting the mirroring application is a port or vlan mirror, no mention of selecting LAG.
- Online help in the emulator.
If you were to mirror the two switch port in the LAG to a destination port, I would have thought that if all switch port interfaces are up and running then mirroring status should be active, but you suggest it is not...hmmmm.
Like you, I noticed in the past, the destination port for mirroring now seems isolated, which to me wasn't a bad situation.
I personally didn't mind this situation, as I was collecting TX and RX frames from the source mirror ports anyway, other frames originating or destined for my PC are a bit of a distractor..
Again , could be interesting to have a chat with the good folks at SBSC technician, and see what they discover.
Regards Dave