Installation guide

4-6
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Chapter 4 Troubleshooting the IGX
Troubleshooting an IGX Node
When a MAJOR/MINOR alarm flashes on the console screen, complete the following steps to determine
the probable cause of the alarm:
Step 1 Use dspnw command to identify the nodes.
Step 2 Use vt command to place yourself at the affected node, and use the dspalms command to identify the
alarm type.
a. If the alarm display indicates a failed connection, go to the “Troubleshooting Failed Connections”
section on page 4-6.
b. If the alarm display indicates a failed circuit line, go to the “Troubleshooting Failed Circuit Lines”
section on page 4-6.
c. If the alarm display indicates a failed trunk, go to the “Troubleshooting Failed Trunks” section on
page 4-8.
d. If the alarm display indicates a failed card, go to the “Troubleshooting Failed Cards” section on
page 4-10.
e. If the alarm display indicates an unreachable node, go to the “Troubleshooting Unreachable Nodes”
section on page 4-10.
Troubleshooting Failed Connections
Step 1 Use the dspcons command to identify which connections have failed and to determine the remote-end
connection assignments.
Step 2 Use the dsplog command to determine the cause of failure of the connections. These failures could
consist of failed circuit lines, trunks cards, or clock overspeeds.
a. If the connections have failed due to a circuit line failure, go to the “Troubleshooting Failed Circuit
Lines” section on page 4-6.
b. If the connections have failed due to a packet line failure, go to the “Troubleshooting Failed Trunks”
section on page 4-8.
c. If the connections have failed due to a card failure, go to the “Troubleshooting Failed Cards” section
on page 4-10.
d. If connections have failed due to a clock over speed condition, go to the “Troubleshooting Clock
Over Speed” section on page 4-10.
Troubleshooting Failed Circuit Lines
Step 1 Use the dspclns command to identify the circuit line number and failure type.
a. If the failure is a circuit line local CGA (no pulses received at the local end of circuit line) go to the
“Troubleshooting Circuit Line Local or Remote CGAs” section on page 4-7.
b. If the failure is a circuit line remote CGA (no pulses received at the remote end of circuit line), go
to the “Troubleshooting Circuit Line Local or Remote CGAs” section on page 4-7.