Debugging And Diagnostics; Offline Diagnostics; Important Points To Remember; Running Offline Diagnostics - Dell Z9500 Configuration Manual

Z-series core and aggregation switche

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Table of Contents

This chapter describes the debugging and diagnostics tasks that you can perform on the switch.

Last Restart Reason

show hardware Commands

Environmental Monitoring

Troubleshooting Packet Loss

Accessing Application Core Dumps

Mini Core Dumps

Full Kernel Core Dumps

Enabling TCP Dumps

Offline Diagnostics

The offline diagnostics test suite is useful for isolating faults and debugging hardware.

The diagnostics tests are grouped into three levels:

Level 0 — Level 0 diagnostics check for the presence of various components and perform essential path verifications. In

addition, they verify the identification registers of the components on the board.

Level 1 — A smaller set of diagnostic tests. Level 1 diagnostics perform status/self-test for all the components on the board

and test their registers for appropriate values. In addition, they perform extensive tests on memory devices (for example,

SDRAM, flash, NVRAM, or EEPROM) wherever possible.

Level 2 — The full set of diagnostic tests. Level 2 diagnostics are used primarily for on-board Loopback tests and more

extensive component diagnostics. Various components on the board are put into Loopback mode and test packets are

transmitted through those components. These diagnostics also perform snake tests using VLAN configurations.

Diagnostics only test connectivity, not the entire data path.

Diagnostic results are stored on the flash of the unit on which you performed the diagnostics.

To run offline diagnostics, follow these steps:

Place the unit in offline mode.

EXEC Privilege mode

offline system

Debugging and Diagnostics