Switching Ethernet
➢ A switch is a multi port bridge, it takes an incoming packet, and looks at the destination MAC address
➢ It decides what port to send the traffic to by looking at its CAM table (MAC to port # mapping)
➢ A switch does NOT do ARP to route ethernet frames (it will flood for unknow frame)
➢ A layer 2 switch does not even know what TCP/IP or ARP are. If it did, how would it route non IP traffic?
➢ Ethernet and TCP/IP were not designed with switches in mind, switches are supposed to be transparent. Thismeans they do switching with no protocol support
Ref: http://marc.merlins.org/linux/talks/Layer2&ARP/talk-src/Layer2&ARP.pdf
http://aconaway.com/2008/07/14/back-to-basics-cam-table-population/
http://www.routeralley.com/ra/docs/switching_tables.pdf
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