Roving Analysis om 3com stack existing of 3 3870 Switches gives invalid data as a result

The title already says a lot, so we have 3 3com Switches type 3870 stacked together at the back. I want to monitor a pc with wireshark. My own pc is on unit 2 port6 and the pc I try to monitor is on Unit2 port 7. When I go to the mangement website from the switch I try to setyp the roving analysis as described but I get a error saying "invalid data"? Any ideas on this
deoudegastAsked:
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delprophetCommented:
I am not sure on using the Web interface in setting this up as I have never used their GUI (Always seemed to run into a bug somewhere).  Have you tried configuring this from the CLI?

Should be under ports settings.  From the menu you should be able to set up the port mirroring. I believe the settings would be similar to the following depending on the software version the switch is running:

feature --> rovingAnalysis ---> add

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deoudegastAuthor Commented:
Thx for your input, we indeed also tried to use the CLI, but that didn't work either.
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deoudegastAuthor Commented:
It seems that you cannot enable LACP on the ports on which you are monitoring. Case solved
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Computer101Commented:
PAQed with points refunded (250)

Computer101
EE Admin
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Network Analysis

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