Netgear XCM8806 Chassis User Manual - Page 197

NETGEAR 8800 User Manual Performing Switch Diagnostics The switch provides a facility for running normal or extended diagnostics. In simple terms, a normal routine performs a simple ASIC and packet loopback test on all ports, and an extended routine performs extensive ASIC, ASIC-memory, and packet loopback tests. By running and viewing the results from diagnostic tests, you can troubleshoot and resolve network issues. On NETGEAR 8800 series switches, you can run the diagnostic routine on Input/Output (I/O) modules or management modules (MSMs/MMs) without affecting the operation of the rest of the system. Note: Before running diagnostics, you must power on the External Power Supply (EPS) when it is connected to the switch. When you run diagnostics on an I/O module, an MSM/MM, the switch verifies that the: • Registers can be written to and read from correctly. • Memory addresses are accessed correctly. • Application-Specific Integrated Circuit (ASICs) and Central Processing Unit (CPUs) operate as required. • Data and control fabric connectivity is active (modular switches only). • External ports can send and receive packets. • Sensors, hardware controllers, and LEDs are working correctly. Note: Before running slot diagnostics on a modular switch, you must have at least one MSM/MM installed in the chassis. The remainder of this section describes the following topics: • Running Diagnostics on page 197 • Observing LED Behavior During a Diagnostic Test on page 199 • Displaying Diagnostic Test Results on page 201 Running Diagnostics If you run the diagnostic routine on an I/O module, that module is taken offline while the diagnostic test is performed. Traffic to and from the ports on that I/O module is temporarily unavailable. When the diagnostic test is complete, the I/O module is reset and becomes operational again. Chapter 8. Status Monitoring and Statistics | 197