Expected network bridge/switch behavior

Hello,

Suppose a bridge/switch has learned a MAC address on certain port, meaning it has seen frames with source address equal to that MAC address coming from that port. Now it receives a frame with _destination_  address set to that MAC address from that port. What a bridge/switch it supposed to do? What standard/RFCs define the behavior of Ethernet switches and bridges in this situation?

Best regards,
Alex
LVL 3
gremwellAsked:
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gremwellAuthor Commented:
Ok, I think I've found the answer myself. According to 802.1d standard, it looks like the bridge is supposed to simply avoid sending the frame back to the port it has received it from. I was asking that question because software switch implementation in POX (l2_learning) drops all packets from the "offending" port in this situation, which creates problems in my setup.
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abhinavgupta72Commented:
can you please ask the same ques using some example??
not getting it.
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gremwellAuthor Commented:
Found the answer myself.
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