If the phone LED is off, then this indicates that the voice daughter card is not detected or is not installed. If the phone LED is green, then this indicates that the voice daughter card is installed. If the link LED is off, then this indicates that the port is not active or the link is not connected. The color orange indicates that the port is disabled through the CLI command (i.e., the shutdown command is configured).Ī flashing orange LED indicates that the port is faulty and has been disabled by the system. The color green indicates that the port is active and the link is connected and operational. If the status LED is off, this indicates that the module is not receiving power or has been powered off. If the module fails to download code and configuration information successfully during the initial reset, the LED stays red the module does not come online. The color red could also indicate that an over temperature condition (i.e., a major temperature threshold) has been exceeded during environmental monitoring. The switch has just been powered on or the module has been hot inserted during the normal initialization sequence. The color red indicates that the module is resetting. This color could also indicate that an over-temperature condition (i.e., a minor temperature threshold) has been exceeded during environmental monitoring.
The color orange indicates that the module is booting or running diagnostics. The color green indicates that all diagnostics have passed and that the module is operational. The supported LEDs, as well as what they indicate, are listed and described in Table 1 below: Cisco Catalyst switches have front-panel LEDs that can be used to determine link status, as well as other variables such as system status. Understanding the meaning of the LEDs is an integral part of Catalyst switch link status and system troubleshooting.
Different Cisco Catalyst switches provide different LED capabilities. If you have physical access to the switch or switches, LEDs can be a useful troubleshooting tool.
Troubleshooting Link Status Using Light Emitting Diodes (LEDs) We cover troubleshooting in detail in our Cisco CCNP ENCOR course. However, in addition to being familiar with the software command suite, it is also important to have a solid understanding of physical indicators (i.e., LEDs) that can be used to troubleshoot link status or that indicate an error condition. Troubleshooting Switches at the Physical LayerĬisco IOS switches support several commands that can be used to troubleshoot Layer 1, or at least suspected Layer 1, issues.
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