Troubleshooting guide

1. Overview
3
1.2 Overview of failure analysis for the entire Switch or a part of the
Switch
If a failure occurs during operation and the actual Switch can be looked at, take appropriate action as
described in 2.1 Procedure for handling Switch failures to troubleshoot the failure.
For a description of the LEDs on the Switch, see the example of the AX1240S-24T2C
switch shown in the following figure and Table 1-1 LED indications, buttons, and connectors.
Front panel layout
Table 1-1 LED indications, buttons, and connectors
No. Model
name
Type Functionality Description
1 PWR LED: Green Indicates whether the
Switch is on.
Green: Power is on.
Green, slowly blinking: The Switch is in the
sleep state.
Off: Power is off or the power supply failed.
2 ST1 LED: Green,
orange, or red
Indicates the Switch
status.
Green: Available for operation
Blinking green: Preparatory state (switch
starting up)
Green, slowly blinking: The LED is set to be
turned off.
Orange: Initial state after the Switch is turned
on.
Red, blinking: A failure has occurred in a part
of the Switch.
Red: A fatal error has occurred on the Switch
(the Switch is no longer usable).
Off: The Switch is off or a power failure has
occurred.
3 ST2 LED:Orange (Not used) Orange: Initial state after the Switch is turned
on.
Off: Turned off because it is no longer used
after Switch startup has been completed.
4 MC Connector Memory card slot Memory card slot
5 ACC LED: Green Indicates the memory
card status.
On: The memory card is being accessed. Do
not remove the memory card.
Off: The memory card is idle. (The memory
card can be inserted or removed.)
6 CONSOL
E
Connector CONSOLE port RS-232C port to connect a console terminal