I installed a TAP between my router and modem so I can get answers when the internet gets slow. My idea was to get all the outgoing traffic from the router mirrored and then capture it with Wireshark. I've turned promiscuous mode on but all I'm getting is ARP packets (see screenshot). I'm a novice at networking; any help would be greatly appreciated.
The tap I'm using is the Dualcomm DCSW-1005 and my network looks like this:
The DCSW-1005 manual says this about port mirroring:
asked 28 Feb '12, 01:08