Cisco Catalyst 4000 series Hardware Troubleshoot page 11

c. Set the config−register to boot from Flash.
3. If you end in rommon or boot mode during the upgrade, refer to Recovering Catalyst Switches
Running CatOS from Booting Failures for more information.
4. Use the Bug Toolkit to track down bugs, or refer to Release Notes for Catalyst 4000 Family Software
Release 5.x for Caveats.
Supervisor is not online or is stuck in boot or rommon
The most common causes for a Catalyst 4000 family supervisor not to be recognized is when it is stuck in
boot or rommon mode due to a missing or corrupt image. In these modes, you are not able to Telnet to the
supervisor and must have a console session open.
1. If the supervisor is stuck in either boot or rommon mode, complete the troubleshooting steps in
Recovering Catalyst Switches Running CatOS from Booting Failures.
2. If the supervisor is not in either boot or rommon mode but is still not online, complete the
troubleshooting steps for the Supervisor Engine in the System component LEDs are orange/red
section of this document.
System component LEDs are orange/red or supervisor not online
Complete these steps:
1. If you observe orange or red LEDs on startup, wait until the system boots up completely before
concluding that there is a problem. The system status LED on the supervisor will stay orange until
bootup is complete, then turn green if bootup is successful. One cause of an orange sys−status LED is
a fan failure.
Next, the supervisor initializes the switching modules, which operate differently depending on the
module; some flash on and off, and others stay orange until initialization is complete. At this point,
the link (port) LEDs turns off altogether until a signal is detected.
2. Understand the Catalyst 4000 family components and what the LEDs tell you. As a starting place,
refer to Troubleshooting the Installation for more information:
Look at the front panel LEDs for your supervisor. Refer to these documents for more information:
♦
Installing the Modules
♦
Catalyst 4500 E−Series Module Installation Note
Look at the front panel LEDs for your switching module. Refer to Catalyst 4500 E−Series Module
Installation Note for more information:
3. Capture the show version, show system, show module, and show test 0 command output.
Power supplyincludes the power supplies and power supply fans. The PS1, PS2, and PS3, for the
Catalyst 4006, status LEDs should be green. If one or both are red, this can indicate a power supply
failure.
a. When you issue the show system command, determine if PS1 or PS2 status is faulty.
Cat4000−c> (enable) set boot config−register 0x2102
Configuration register is 0x2102
ignore−config: disabled
auto−config: non−recurring
console baud: 9600
boot: image specified by the boot system commands