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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

PDF

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, Level 0 diagnostics 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, access, and read-write tests for all the components on the board and test their registers for appropriate values. In addition, Level 1 diagnostics perform extensive tests on memory devices (for example, SDRAM, flash, NVRAM, EEPROM) wherever possible.
  • Level 2 — The full set of diagnostic tests. Level 2 diagnostics are used primarily for on-board MAC level, Physical level, external 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 virtual local area network (VLAN) configurations.
  • NOTE: Diagnostic is not allowed in Stacking mode, including member stacking. Avoid stacking before executing the diagnostic tests in the chassis.

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