Debugging And Diagnostics; Offline Diagnostics; Important Points To Remember; Running Offline Diagnostics - Dell S6100 Configuration Manual

This chapter describes debugging and diagnostics for the device.

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 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 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. Level 2 diagnostics also perform snake tests using virtual local area network (VLAN) configurations.

Important Points to Remember

• You can only perform offline diagnostics on an offline standalone unit.
• 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.
• When offline diagnostics are complete, the unit or stack member reboots automatically.

Running Offline Diagnostics

To run offline diagnostics, use the following commands.
For more information, refer to the examples following the steps.
1 Place the unit in the offline state.
EXEC Privilege mode
offline stack-unit stack-unit-number
NOTE: The system reboots when the offline diagnostics complete. This is an automatic process. The following warning
message appears when you implement the offline stack-unit command: Warning - Taking unit offline
for running diagnostics will make it operationally down, causing traffic disruption
through the unit. Please make sure that stacking/fanout not configured for Diagnostics
execution. Also reboot/online command is necessary for normal operation after the
offline command is issued. Proceed with Offline [confirm yes/no]:yes
After the system goes offline, you must reload or run the online stack-unit
2 Confirm the offline status.
EXEC Privilege mode
show system brief
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Debugging and Diagnostics

Debugging and Diagnostics
stack-unit-number command for the normal operation.
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