Cabletron Systems SmartSTACK ETHERNET ELS10-27, User Manual

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Contents
xiii
CHAPTER 5 SMARTSTACK ETHERNET ELS10-27
DIAGNOSTICS AND TROUBLESHOOTING
5.1 Power-up Diagnostics .............................................................................5-1
5.1.1 Power-up LED Sequence ..............................................................5-1
5.1.2 Specific Power-up Tests ................................................................5-2
5.1.3 Power-up Diagnostics Results .....................................................5-2
5.2 Responses to Failures at Power-up .......................................................5-2
5.3 Status and Activity Indicators................................................................5-3
5.4 Troubleshooting .......................................................................................5-5
5.5 SmartSTACK Ethernet ELS10-27 Does Not Power Up.......................5-5
5.5.1 Connectivity Problems..................................................................5-5
5.5.2 SmartSTACK Ethernet ELS10-27 Has Rebooted .......................5-5
5.5.3 SmartSTACK Ethernet ELS10-27 Does Not Respond
to NMS ............................................................................................5-6
APPENDIX A TECHNICAL SPECIFICATIONS
A.1 SmartSTACK Ethernet ELS10-27 Specifications................................A-1
A.2 Serial Cable Pin Assignments ..............................................................A-3
A.3 10BASE-T Pin Assignments..................................................................A-4
A.4 Straight-through Wiring .......................................................................A-5
A.5 Crossover Wiring ...................................................................................A-5
A.6 5 - 4 - 3 Rule.............................................................................................A-6
A.7 EPIM-100FX ............................................................................................A-6