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Hmm, check your switch configuration. You may only be spanning traffic into, or out 
of, the source port#s#. Some switches let you span ports or VLANs #if you#re doing the 
latter then check your VLAN definitions#. Some switches can be configured to not span 
multicast traffic. Don#t forget, if you#re spanning in+out, you#re effectively 
spanning up to 200Mb on to a 100Mb wire which could swamp your span port at high 
loads. Best bet is probably to put a sniffer on the span port, generate some test 
traffic and see if the sniffer logs it. Oh, and whilst you#re checking the span port 
settings, it#s worth seeing whether the span port will accept packets into it #to 
allow real secure kills#. Also your switch may give you some low-level stats and error 
counts on your source and span ports, so check those. Good luck.#######We set up the 
spanning and connected the monitoring nic, I guess I was###expecting to see more 
traffic than I do.  I was just concerned that it may###not be spanned ap!
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propriately.  Now that I know it 


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