Boot Problems; Contacting The Cisco Technical Assistance Center - Cisco Catalyst 9400 Series Hardware Installation Manual

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Boot Problems

The supervisor module operates in a continuous loop by default if you have not set the boot variable

MANUAL_BOOT in ROMMON mode. To boot manually, set MANUAL_BOOT=yes; to auto-boot, set

MANUAL_BOOT=no.

The supervisor module goes into ROMMON mode or fails to boot when the system image is either corrupt

or absent.

The supervisor module has an onboard system Flash memory (bootflash), which can easily hold multiple

system images. Therefore, have a backup image. In addition to the bootflash, the supervisor module supports

compact Flash in the usbflash0: device. The supervisor also provides for transfer via TFTP of the image from

ROMMON mode, which enables faster recovery of absent or corrupt images.

In addition to the above mentioned storage devices, you can install a hard disk, which is displayed as disk0:.

We recommend that you use this for general purpose file storage, similar to usbflash0:, but not to store system

images.

If you are unable to solve a startup problem after using the troubleshooting suggestions in this chapter, contact

a Cisco TAC representative for assistance and further instructions.

Before you call, have the following information ready to help the Cisco TAC assist you as quickly as possible:

• Date you received the switch

• Chassis serial number

• Type of software and release number

• Maintenance agreement or warranty information

• Brief description of the problem

• Console captures related to your problem

• Brief explanation of the steps you have already taken to isolate and resolve the problem

Cisco Catalyst 9400 Series Switches Hardware Installation Guide

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Troubleshooting

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