Cabletron Systems STS16-20R, STS16-20D manual Labels, Status and Activity LEDs, State Meaning

7

Labels

The two labels in the right side of the front panel are:

•The MAC Address Label: The unique globally assigned base Base MAC- Address of the switch.

•The Switch Number Label: Blank label for an individual user identification of the switch.

Status and Activity LEDs

The SmartStack STS16-20D/STS16-20R features three status LEDs at the left on the front panel that show the current status of the switch. There are also three activity LEDs at the left that indicate the activity of the optional stacker link module. Moreover, each Token Ring port has two LEDs.

Refer to Figure 2 on page 5 for the locations of all the LEDs.

Table 1 lists the status LEDs and their meanings.

LED	State	Meaning
PWR	Off	The switch is not connected to a power outlet, or
		the power supply is faulty.
	On	The switch is receiving power.
DIAG	On	The DIAG diagnostics LED is on during the
		power-on self-test. During download of a new
		software image, the DIAG LED blinks to indicate
		the clearing (slow blink) and loading (faster
		blink) of FLASH memory.
ERR	On	The ERR LED is off during normal operation. If
		the LED turns on, an error has occurred. Power
		the switch down and up again. The ERR LED
		should not turn on again. If it does, the switch is
		faulty.
		Note that on SmartStack STS16-20R, the ERR
		LED might turn on if the switch is powered only
		by an external power supply.

Table 1. Status LEDs and their Meanings

The stack-link LEDs and port LEDs are described in the tables on the next page.

Introduction SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide