Administrator Guide

Offline Diagnostic Commands
The offline diagnostics test suite is useful for isolating faults and debugging hardware. While tests are running, Dell EMC Networking OS
results are saved as a text file (TestReport-SU-X.txt) in the flash directory. This
show file command is available only on master and
standby.
Important Points to Remember
• Offline diagnostics can only be run when the unit is offline.
• You can only run offline diagnostics on a unit to which you are connected via the console. In other words, you cannot run diagnostics
on a unit to which you are connected to via a stacking link.
• Diagnostics only test connectivity, not the entire data path.
diag stack-unit
Run offline diagnostics on a stack unit.
Syntax
diag stack-unit number [alllevels | level0 | level1 | level2 | interactive
test-id ] verbose [no-reboot]
Parameters
number
Enter the stack-unit id.
alllevels Enter the keyword alllevels to run the complete set of offline diagnostic tests.
level0 Enter the keyword level0 to run Level 0 diagnostics. 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.
level1 Enter the keyword Level1 to run Level 1 diagnostics. Level 1 diagnostics is a smaller set
of diagnostic tests with support for automatic partitioning. They 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, EEPROM, and CPLD) wherever possible.
level2 Enter the keyword level2 to run Level 2 diagnostics. Level 2 diagnostics are a full set of
diagnostic tests with no support for automatic partitioning. 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.
verbose Enter the keyword verbose to run the diagnostic in Verbose mode. Verbose mode gives
more information in the output than Standard mode.
no-reboot Enter the keyword no-reboot to prevent the system from rebooting after the test. To
bring the stack unit to online state, use the online stack-unit stack-unit-
number command.
interactive Enter the keyword interactive with the test ID to test interactive test cases. The
test cases can be found using the show diag testcase stack-unit stack-
unit-id interactive command.
Defaults None
Command Modes EXEC Privilege
Command History
This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC
Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S3148.
492 Debugging and Diagnostics