Install Guide

LED Description

• Blinking amber—noncritical system error—fan failure or power

supply failure

Power

• Solid green—normal

• Solid amber—POST is in progress

• Blinking amber—power supply failed

• O—no power

Fan

• Solid green—fan powered and running at the expected RPM

• Blinking amber—fan failed, including incompatible airow

direction when you insert the PSU or fan trays with diering

airows

Locator

• O—locator function is disabled

• Blinking blue—locator function is enabled

QSFP+ port when used as one 40G port—only rst LED is used in

40G mode

• O—No Link

• Solid green—link at 40G speed

• Blinking green—port activity at 40G speed

• Solid amber—link at speed lower than 40G

• Blinking amber—port activity at lower than 40G speed

• Blinking amber one second on/one second o—port locator

function

QSFP+ port when used as four ports of 10G—all four LEDs are

used

• O—no Link

• Solid amber—4x10G speed

• Blinking amber—port activity at 4x10G speed

• Blinking amber one second on/one second o—port locator

function

Stack ID Number

Displays the stack unit number of the switch

Displays 1 by default if switch is not part of a stack

Figure 5. S4048T-ON PSU-side LEDs

1 Fan LED

The S4048T-ON System