Switch Verification

LAN switch logic really does reduce to a pretty short description, and it should, because switches need to forward potentially millions of frames per second (fps). Receive the frame, determine the VLAN, match the destination MAC to the MAC table, choose the outgoing interfaces, and forward the frame. However, making sense of the show commands can be a little more challenging, particularly if you do not get to use them in real networks every day. This section reviews a couple of key show commands that will prove useful when thinking about STP.

Viewing the MAC Address Table

ImageMAC Address Table Corruption

The first example lists ...

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