Status And Activity Leds; Table 1. Status Leds And Their Meanings - Cabletron Systems SmartSTACK STS16-20RM Installation And User Manual

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Status and Activity LEDs

The switch 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. On STS16-20RM, these two LEDs are unlabeled and
located on the upper edge of each port. On STS16-20FRM, these LEDs are located
under each port and labeled ACT and INS.
Refer to Figure 3 and Figure 4 in this chapter for the locations of all the LEDs.
Table 1 lists the status LEDs and their meanings.
LED
PWR
DIAG
ERR

Table 1. Status LEDs and Their Meanings

The stack-link LEDs and port LEDs are described in the tables on the next page.
SmartStack STS16-20RM/STS16-20FRM Token Ring Switches, P/N: 9032957-01
State
Off The switch is not connected to a power outlet, or
the power supply is faulty.
On The switch is receiving power.
On The DIAG diagnostics LED is on during the
power-on self-test.
Blinking During download of a new software image, the
DIAG LED blinks to indicate the clearing (slow
blink) and loading (faster blink) of FLASH
memory.
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 the ERR LED also turns on if the switch
is powered only by an external power supply.
Meaning
Introduction