Series Debugging And Diagnostics; Offline Diagnostics; Important Points To Remember; Running Offline Diagnostics - Dell Z9000 Configuration Manual

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Z-Series Debugging and Diagnostics

This chapter describes debugging and diagnostics for the Z-Series platform.

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

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, use the following command.

Place the unit in the offline state.

EXEC Privilege mode

offline stack-unit

For normal system operation, reload the system after you issue the offline command.

NOTE: You cannot enter the command on a stacking unit.

Z-Series Debugging and Diagnostics

Troubleshooting