Administrator Guide

on the flash; if the flash is out of memory, the coredump is aborted. Dell EMC Networking OS completes
the coredump process and wait until the upload is complete before rebooting the system.
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
506 Debugging and Diagnostics