09-16-2010 10:02 AM - edited 03-14-2019 06:30 AM
How can I check to see if 802.1Q VLAN tagging information is being stripped from the RTP stream by the workstation's NIC?
09-16-2010 10:53 AM
WIth some difficulty, I imagine - what is your scenario?
Even if you use wireshark it would be difficult to know whether the NIC drivers are doing things or not. If your NIC supports multiple VLAN subinterfaces then you'd know if it was being stripped as you would receive it correctly in your app; but generally the traffic destined for a PC would not be dot1q encapsulated anyway.
Aaron
09-19-2010 01:02 AM
Some network cards strip the dot1q headers, so your packet capture won't have this data. If you're not seeing dot1q headers please check the following link from wireshark:
http://wiki.wireshark.org/CaptureSetup/VLAN#head-81781716144f2855ab0aff2f8b752e95f2562efb
Apply the previous settings to the machine you're capturing with.
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