Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 785
S-Series Debugging and Diagnostics, Offline diagnostics, Important Points to Remember
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46 S-Series Debugging and Diagnostics The chapter contains the following major sections: • Offline diagnostics • Trace logs • Last restart reason (S55) • show hardware commands (S55) • Troubleshooting packet loss • Application core dumps • Mini core dumps 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, they 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, they perform extensive tests on memory devices (e.g., 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. These diagnostics also perform snake tests using VLAN configurations. Important Points to Remember • You can only perform offline diagnostics on an offline standalone unit or offline member unit of a stack of three or more. You cannot perform diagnostics on the management or standby unit in a stack of two or more (Message 1). Message 1 Offline Diagnostics on Master/Standby Error Running Diagnostics on master/standby unit is not allowed on stack. • Perform offline diagnostics on one stack member at a time. • Diagnostics only test connectivity, not the entire data path. S-Series Debugging and Diagnostics | 785
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