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8.3.17.0 - Force10 Networks

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www.dell.com | support.dell.com<br />

Offline Diagnostics<br />

The offline diagnostics test suite is useful for isolating faults and debugging hardware.The diagnostics tests<br />

are grouped into three levels:<br />

• Level 0—Level 0 diagnostics check for the presence of various components and perform essential path<br />

verifications. In addition, they verify the identification registers of the components on the board.<br />

• Level 1—A smaller set of diagnostic tests. Level 1 diagnostics perform status, self-test, access, and<br />

read/write tests for all the components on the board and test their registers for appropriate values. In<br />

addition, they perform extensive tests on memory devices (for example, SDRAM, flash, NVRAM,<br />

EEPROM) wherever possible.<br />

• Level 2—The full set of diagnostic tests. Level 2 diagnostics are used primarily for on-board MAC<br />

level, Physical level, and external loopback tests and more extensive component diagnostics. Various<br />

components on the board are put into loopback mode, and test packets are transmitted through those<br />

components. These diagnostics also perform snake tests using virtual local area network (VLAN)<br />

configurations.<br />

Note: Diagnostic is not allowed in Stacking mode, including member stacking. Avoid stacking before<br />

executing the diagnostic tests in the chassis.<br />

Important Points to Remember<br />

• You can only perform offline diagnostics on an offline standalone unit. You cannot perform<br />

diagnostics if the ports are configured in a stacking group. Remove the port(s) from the stacking group<br />

before executing the diagnostic test.<br />

• Diagnostics only test connectivity, not the entire data path.<br />

• Diagnostic results are stored on the flash of the unit on which you performed the diagnostics.<br />

• When offline diagnostics are complete, the unit or stack member reboots automatically.<br />

Running Offline Diagnostics<br />

To run offline diagnostics, follow these steps:<br />

1. Place the unit in the offline state using the offline stack-unit command from EXEC Privilege mode<br />

(Figure 22-3).<br />

The system reboots when the off-line diagnostics complete. This is an automatic process. A warning<br />

message appears when you implement the offline stack-unit command.<br />

Warning - Diagnostic execution will cause stack-unit to reboot after completion of<br />

diags.<br />

Proceed with Offline-Diags [confirm yes/no]:y<br />

246 | Debugging and Diagnostics

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