Installation guide

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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
c. If the failure is circuit line frame slips (indicating excessive frame slips on the T1 between the IGX
node and the PBX), go to the “Troubleshooting Circuit Line Frame Slips” section on this page.
d. If the failure is circuit line bipolar errors (indicating excessive bipolar errors on this circuit line), go
to the “Troubleshooting Circuit Bipolar Errors” section on this page.
Troubleshooting Circuit Line Local or Remote CGAs
Step 1 Use the dsplog command to determine date, time of day, and the duration of the CGA alarm.
Step 2 Determine if the PBX T1 subrate or the PBX E1 interface went down at the time the CGA alarm was
logged by the IGX node.
Step 3 Check cabling between IGX node and the PBX and make necessary repairs, if defective.
Step 4 Make a note of the steps taken and call the Cisco TAC (see the “Obtaining Technical Assistance” section
on page xxiii).
Troubleshooting Circuit Line Frame Slips
Step 1 Use the dsplog command to determine date, time of day, and duration of the frame slip alarm. Also
determine if the clock source for this line has changed due to line failure in the network.
Step 2 Use the dspclnerrs command to quantify frame slips and rate information.
Step 3 Use the dspclnhist command to obtain historical information on frame slips.
Step 4 Use the dspcurclk command to identify the current clock source and path to the current clock source.
Step 5 Use the clrclnalm command to clear the circuit line alarms
Step 6 Make a note of the steps taken, and call the Cisco TAC (see the “Obtaining Technical Assistance”
section on page xxiii).
Troubleshooting Circuit Bipolar Errors
Step 1 Use the dsplog command to determine when the bipolar error threshold was exceeded, and the duration
of the alarm.
Step 2 Use the dspclnerrs command to quantify the bipolar errors.
Step 3 Use the dspclnhist command to obtain historical information on bipolar errors.
Step 4 Check cabling between IGX node and the PBX for loose connections, and tighten it if it is loose.
Step 5 Use the clrclnalm command to clear line alarms.
Step 6 Make a note of the steps taken, and contact the Cisco TAC. For more information, refer to the “Obtaining
Technical Assistance” section on page xxiii.