TAILIEUCHUNG - Ebooks: Catalyst 3900 Troubleshooting

This document describes how to use the Cisco Catalyst 3900 Statistics screens to help troubleshoot various switching scenarios. It presents some of the most common problems faced with the 3900 switch and how the Statistics screens can be used to identify can use the Token Ring acronyms document to explain some of the acronyms used. The document concentrates on the following areas: | Catalyst 3900 Troubleshooting Snluti in T Products T Ord E rill 1 T Support T p ar triers T ĩrâĩnĩn Tech Nates Catalyst 3900 Troubleshooting Contents Introduction Using the Statistics Menu Using the Display Summary Screen Using the Message Log Information Screen Using the Switch Statistics Screen to Check the Total Throughput Troubleshooting Port Connectivity and Throughput problems Using the Port Status Screen to Check the Configuration Troubleshooting Address Table Problems Troubleshooting Spanning Tree Problems Checking the VLAN Statistics Checking the VTP Statistics Related Information Introduction This document describes how to use the Cisco Catalyst 3900 Statistics screens to help troubleshoot various switching scenarios. It presents some of the most common problems faced with the 3900 switch and how the Statistics screens can be used to identify can use the Token Ring acronyms document to explain some of the acronyms used. The document concentrates on the following areas Display Summary - The most important configuration and operational settings on the 3900 switch Message Log - Important event and error messages the 39000 switch has logged Switch Statistics - The behavior of the 3900 switch as a whole Port Status and Statistics - Looking at the type of traffic on individual ports Address Tables - Looking at the internal switching tables to see from which port an address has been learned Spannning Tree Information - Looking at the various spanning tree modes running at the TrBRF and TrCFRF level These areas are explained in more detail below. Using the Statistics Menu http warp public 482 1 of 23 5 5 2001 10 37 34 PM Catalyst 3900 Troubleshooting This is the main Statistics menu for the Catalyst 3900. The screens described below are all accessible from here. The information on all of the statistics menu screens is refreshed approximately every five seconds. Using the Display Summary Screen http warp public

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