Preventing STP forwarding loops

The Spanning Tree Protocol is an OSI┬ layer-2 protocol┬ that ensures a┬ loop-free topology┬ for any bridged LAN. Spanning tree allows a network design to include spare (redundant) links to provide automatic backup paths if an active link fails, without the danger of bridge loops, or the need for manual enabling/disabling of these backup . . . → Read More: Preventing STP forwarding loops

Troubleshooting Errdisable Ports on Cisco

Contents Introduction Prerequisites Requirements Components Used Background Information Platforms That Use Errdisable Errdisable Function of Errdisable Causes of Errdisable Determine If Ports Are in the Errdisabled State Determine the Reason for the Errdisabled State (Console Messages, Syslog, and the show errdisable recovery Command) Recover a Port from Errdisabled State Correct the Root Problem . . . → Read More: Troubleshooting Errdisable Ports on Cisco