Installation guide

CHAPTER
4-1
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
4
Troubleshooting the IGX
This chapter describes how to diagnose problems. When a troubleshooting table in this chapter
recommends replacement, refer to the procedures in Chapter 5, “Replacing Parts on the IGX.”
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.
Checking 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 goes off. Refer to Chapter 5, “Replacing Parts on
the IGX,” for instructions on reseating 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
that the cards have not put an excessive load on the power supplies.
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). For further information, refer to the “Obtaining Technical Assistance” section
on page xxiii.
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.
• CGA relay and forced yellow signal group channel additions.