Forwarding of Switch data

Plan if the show!!

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So it's not my imagination. The MAC Address Table of the switch is blank when it is plugged in. (the book says that when the switch starts, the MAC Address table is blank?) Why did the experiment come to this? ）

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When the R1 to ping R3, this time R1 to encapsulate into frames, so will send the ARP broadcast request R3 MAC address, R3 reply MAC address to R1 (at this time recorded the R1 of IP and Mac mapping), with the source of the Mac successfully sealed, and then according to the route entry f0/0 to the switch, The switch is forwarded according to the MAC Address Table F0/2 find R3.

Forwarding of Switch data