Locating a Device Using Port LEDs
In a stacking environment or SPX system, the LED ON/OFF feature can be enabled from
the active unit, standby unit, member unit, or PE unit. If the port LEDs are turned
on from the active unit, all the port LEDs of the active unit and the standby units
are turned on. To identify or locate a specific unit, you must specify the unit ID
of the respective unit. After locating the device, you can either turn off all the
port LEDs or set the port LEDs to the default status. The default LED status is the
status of the LEDs according to the current status mode, if the status mode is supported.
If the status mode is not supported, the link status or port status is considered
to be the default LED status. The default LED status behavior also applies after the
device is rebooted when all port LEDs are turned on using the
led on command.
LED ON/OFF Considerations
The following details must be considered when port LEDS are turned on to locate a device:
- The status mode feature cannot be used when port LEDs are turned on to locate a device. If the status mode is changed, the LED status will be changed to the respective mode.
- If the status of the port changes due to any events such as link up or link down, USB plug in or USB plug out, optical interruption, and so on, the LED status of that particular port LED is changed.