Product specifications

Problem Solving Using LEDs
A-6 Problem Solving
Symptom Probable Cause Corrective Action
Module
OK LED is
flashing,
but module
continues
to operate
normally.
A nonfatal error
occurred.
Contact your service representative.
VNbus
Status LED
is off.
No connection. Check that the module is properly
attached to one of the backplane
VNbuses and that the VNbus is
connected by management software.
VNbus
Activity
LED is off.
There is low traffic
activity or no traffic
activity.
The module or any
other unit in the
MultiSwitch 900 may
not be connected to an
active VNbus channel.
If the module is
connected to an active
VNbus and the VNbus
Activity LED is off,
the module is
defective.
Ensure that there is traffic activity. If
the VNbus Activity LED fails to turn
on, then turn the module off
momentarily by removing it from the
power supply. Check that the VNbus
Traffic LED blinks momentarily
during the LED power-up self-test.
Connect a known active VNbus
channel to any unit in the
MultiSwitch 900.
Replace the module.
LDM Port
Status LED
is off.
No link established. Check that a proper link has been
established.
Port Status
LEDs are
off.
No cable attached or
port is broken.
Check cable type.