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New Member

Sniffing Around - Unicasts all over the place

Fired up my new network analyser today to start looking under the hood. I was surprised to see lots of unicasts between different hosts. I was expecting broadcasts and multicasts, and maybe a stray unicast because of ARP table timeout. But I am seeing many unicast packet conversations between the same hosts.

Thought layer two switches were not suppose to send packets except to the port where the mac address was detected.

I don't have port spanning on - not yet. Have a pretty small network with low utilization. Not anywhere near enough hosts to fill an ARP table. Any ideas about why Cisco layer two switches are flooding out unicasts?

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New Member

Re: Sniffing Around - Unicasts all over the place

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