Specifications

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Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases

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Chapter 3 Cisco IGX 8400 Series Nodes

Troubleshooting

This section describes how to diagnose problems.

The IGX operating system software does most of the IGX monitoring and maintenance. The only action

that qualifies as preventive maintenance is checking the power supplies.

Tip For information on the switch software commands listed in this section, see the full command

description in the Cisco WAN Switching Command Reference.

Checking the AC Power Supplies

You cannot directly measure voltages on the AC power supplies in an IGX node. If a problem exists with

one of the supplies, one or both the DC and AC LEDs turns off. Refer to the chapter on repair and

replacement for instructions on re-seating or replacing an AC power supply.

After you install new or additional cards in the node, check the LEDs on the power supplies to make sure

the cards have not put an excessive load on the power supplies.

Note Use the switch software dsppwr command to see AC power supply information.

Troubleshooting an IGX Node

This section describes elementary troubleshooting procedures and briefly describes the commands used

when troubleshooting an IGX node. (These commands are described in detail in the Cisco WAN

Switching Command Reference.) This set of procedures is not exhaustive and does not take into account

any of the diagnostic or network tools available to troubleshoot the IGX node.

Caution Do not perform any disruptive tests or repairs to the IGX node without first calling the Technical

Assistance Center (TAC—see the “Obtaining Technical Assistance” section on page xiv). Cisco

personnel can help isolate the fault and provide repair information.

This section contains the following topics:

• Troubleshooting tables for the IGX node

• System hardware status (configuring and displaying), including circuit cards, system buses, and

power supplies

• Channel loopback and connection tests

• Alarm thresholds for statistical line errors, and line error display reporting

• External test equipment, such as a BERT