أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
The below link will help you.
https://learningnetwork.cisco.com/thread/15380
http://networkengineering.stackexchange.com/questions/10899/why-each-and-every-single-port-on-layer-2-switches-need-to-have-its-own-mac-add