40 minutes of video on STP switching loops http://www.thebryantadvantage.com/CCNAWebinars.htm
Review STP in prep for EtherChannel. Root Bridge, BPDU, Bridge ID, STP database, Port cost, Nondesignated ports, forwarding ports, blocked ports.
DEC protocol is STP. IEEE version is 802.1D
Sat450's Weblog 