Cabletron Systems SmartSTACK 10 ELS10-26, User Manual

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Contents
vii
CHAPTER 5 ELS10-26 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 Software Checksum Comparison ................................................5-2
5.1.4 Power-up Diagnostics Results .....................................................5-3
5.2 RESPONSES TO FAILURES AT POWER-UP......................................5-3
5.3 STATUS AND ACTIVITY INDICATORS ............................................5-3
5.4 TROUBLESHOOTING............................................................................5-6
5.5 ELS10-26 DOES NOT POWER UP ........................................................5-6
5.5.1 Connectivity Problems..................................................................5-6
5.5.2 ELS10-26 Has Rebooted ................................................................5-6
5.5.3 ELS10-26 Does Not Respond to NMS .........................................5-7
APPENDIX A TECHNICAL SPECIFICATIONS
A.1 ELS10-26 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-6
A.6 The 5 - 4 - 3 Rule ....................................................................................A-6
A.7 FEPIM Specifications ............................................................................A-7
APPENDIX B GLOSSARY