Installation Guide

TABLE 35 Router LED states and actions (continued)
LED label Desired state Meaning Abnormal state Meaning or action
that is rated for
the outlet.
• Make sure that
the power source
has power.
DC OUT Green (steady) The power supply is
providing DC power to the
router.
O The power supply is not
supplying power to the
router. If the DC IN LED is
green, then there is a
problem with the power
supply and it must be
replaced.
ALM O The power supply is in
normal operating condition.
Amber The power supply is
malfunctioning.
Fan control module (two LEDs on rear panel of router)
Unlabeled Green (steady) The fans are working and
responding to controls from
the fan control module.
O or amber The fans are not receiving
power (o), or the fans are
not working and not
responding to controls from
the fan control module
(amber). Check the
following:
• If the LED is o,
check the power
LED on the other
modules to make
sure they are
receiving power. If
you are using a
DC power source,
check your power
source for
problems.
• If you are using
AC power
supplies, take the
actions described
in the Meaning or
Action column for
the AC power
supply LED. If
these actions do
not resolve the
problem, check
the LED on each
power supply or
enter the show
chassis
command at any
CLI prompt to
determine if a
power supply has
failed. If a power
supply has failed,
you must replace
it.
Verifying proper operation
Extreme Routing MLX Series Hardware Installation Guide
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