For the sake of monitoring my internet connection I have set up a port mirror on my Dell powerconnect 5548 from the SFP port to a 1Gb port on the switch, connected to my monitoring interface. The SFP interface is the uplink port to my default gateway.
The port mirror is listed as being "active" within the switch interface but tcpdump is not picking anything up on the interface except broadcast traffic.
Any ideas for what could be wrong?
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