Cabletron Systems DIGITAL VNswitch 900CG Installation And Configuration Manual page 78

Problem Solving Using LEDs
Table A-2: Problem Solving Using the LEDs (continued)
Symptom
VNbus
Status LED
is off.
VNbus
Activity
LED is off.
LDM Port
Status LED
is off.
Port Status
LEDs are
off.
Port Activity
LEDs are
off.
A-6 Problem Solving
Probable Cause
No connection.
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.
No link established.
No cable attached or
port is broken.
There is low or no port
activity.
Ensure that the cable
has activity on it. If the
LED still fails to turn
on, the module is
defective.
Corrective Action
Check that the module is properly
attached to one of the backplane
VNbuses and that the VNbus is
connected by management software.
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
Activity 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.
Check that a proper link has been
established.
Check cable type.
Ensure that the port is present. If the
Port Activity LED stills fails to turn
on, then turn the module off
momentarily by removing it from the
power supply. Check that the Port
Activity LEDs blink momentarily
during the LED power-up self-test.
Replace the module.