VLAN- Tagged/Untagged and Snort rules

[amn0p () me com]

Hi everyone,

I was doing some reading on this topic but wasnt able to find conclusive answer. How does Snort handle traffic coming 
from mirrored port on network switch which is mix of vlan tagged and untagged traffic. Due to this would Snort 
signatures fail or give false positives? If yes, what is the best way to handle, so that Snort works as intended. 
Thanks for your time and help.
-Amit

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