Appendix B: Troubleshooting; Troubleshooting Checklists; Layer 1 - Extreme Networks ExtremeWare XOS Guide Manual

B Troubleshooting
This appendix describes some troubleshooting tips on the following topics:
Troubleshooting Checklists on page 609
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LEDs on page 612
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Using the Command Line Interface on page 614
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Using Standalone ELRP to Perform Loop Tests on page 620
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Using the Rescue Software Image—Modular Switches Only on page 623
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Debug Mode on page 626
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Saving Debug Information to the Memory Card on page 626
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TOP Command on page 629
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TFTP Server Requirements on page 629
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System Health Check—Modular Switches Only on page 629
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System Odometer on page 631
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Temperature Operating Range on page 632
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Corrupted BootROM on the BlackDiamond 8800 Family of Switches on page 633
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Inserting Powered Devices in the PoE Module—BlackDiamond 8800 Family of Switches Only on
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page 633
Untagged Frames on the 10 Gbps Module—BlackDiamond 10K Switch Only on page 633
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Running MSM Diagnostics from the Bootloader—BlackDiamond 10K Switch Only on page 633
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Contacting Extreme Networks Technical Support on page 634
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If you encounter problems when using the switch, this appendix may be helpful. If you have a problem
not listed here or in the release notes, please contact Extreme Networks Technical Support.

Troubleshooting Checklists

The information in this section provides simple troubleshooting checklists for Layer 1, Layer 2, and
Layer 3. The commands and recommendations described are applicable to both IPv4 and IPv6
environments unless otherwise specified. If more detailed information about a topic is available, you are
referred to the applicable section in this appendix.

Layer 1

When troubleshooting Layer 1 issues, verify:
The installation of cables and connectors.
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The behavior of LED status lights. For additional information about LEDs, see
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ExtremeWare XOS 11.3 Concepts Guide
"LEDs" on page 612.
609