Its like being in one conversation but only receiving every other word (and someone else receiving the remaining words).ĭuplicate MAC addresses on the same L2 network causes both hosts to have communication issues. On the receiving side, the hosts will never get all the frames that are intended for them. If both hosts are transmitting constantly, that will cause the MAC address entry to bounce between the two switch ports (known as MAC flapping). It will simply update its MAC address table with the location of the most recent frame arriving with the duplicate MAC address. The Switch will not store the same MAC address on multiple ports. If not, what is the behavior when frame with known MAC comes from a different interface?

If a there are more than one NICs on the same LAN that share the same MAC address, it will cause all sorts of communication issues. A MAC address is an address of a unique NIC on the network, and each MAC address will only appear once in a switch's MAC address table.

Is it possible that there is one MAC address associated to more interfaces in the switch MAC table?

Mac ethernet and wifi same time