O'Reilly logo

Cisco CCNA Routing and Switching ICND2 200-101 Official Cert Guide by Wendell Odom

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

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 ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required