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Table 4-2. Problem Determination Using Port Status LEDs during Traffic
Status
LED
Possible Cause Corrective Action
OFF Port is disabled. Enter the SHOW PORT command at
the ATM console to see if port is
enabled.
6412M-25-TP module is not
powered ON.
1) Check the Port Status LED and
the power supply LEDs by following
the instructions in “Verifying LED
Operation” on page 4-1.
2) Re-insert the 6412M-25-TP
module in the hub.
Status LED is burned out. 1) Check the Status LED by
following the instructions in
“Verifying LED Operation” on
page 4-1.
2) If necessary, replace the module.
6412M-25-TP module port is
faulty.
Perform the wrap tests described in
“Determining the Failing Component
Using a Wrap Test” on page 4-9.
There is a bad connection on the
ATM backplane.
1) Remove the 6412M-25-TP
module and re-insert it in the same
slot.
2) If the problem persists, insert the
module in another slot.
UNI port is enabled but not in
service.
From the ATM host, make sure that
the station attached to the port has
been assigned an ATM address and
that the address is unique within the
network.
4-6 25 Mbps ATM Module - Installation and User's Guide