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I have a Network Video Recorder connected to an IP camera on a Cisco 3750 switch. I wanted to sniff the traffic between the recorder and the camera so I mirrored (using SPAN) the camera port (FA1/0/23) to my PC port (FA1/0/9). Then I run wireshark on my PC in promiscuous mode expected to capture all packets between the recorder and the camera but all I see is arp and broadcast traffic!! Based on the activity led, there's lot of traffic on the mirrored port but nothing is being captured by wireshark. What am I doing wrong?

asked 13 Oct '15, 10:28

dyue's gravatar image

accept rate: 100%

Thank you for those who viewed this question but I found the answer within these thousands of posted answers. It turned out that I had left my antivirus and firewall on the PC I was using. Disable Bitdefender and now I am seeing everything.

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answered 13 Oct '15, 10:55

dyue's gravatar image

accept rate: 100%

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question asked: 13 Oct '15, 10:28

question was seen: 2,714 times

last updated: 13 Oct '15, 10:55

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