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Introduction SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide
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.
The stack-link LEDs and port LEDs are described in the tables on the next page.
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