Understanding Spanning Tree Protocol

Understanding Spanning Tree Protocol

Postby stephen » Sat Apr 02, 2011 7:40 am

My Cisco router SG300-28P log was showing a STP Blocking state in a number of ports that occurred when port G7 on the router came up. The users were complaining that the network was dropping connections to the IBM server running AIX operating system. In order to understand what was happening I found this web site has a very good explaination of the STP (Spanning Tree Protocol)

The problem was that their was a loop in the conections to the switch. So I shutdown the port G7 that was causing the STP Blocking state in the other ports.
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