Specifications

B-1

Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide

Release 3, Part Number 78-14788-01 Rev. C0, January 2004

APPENDIX

PXM45 Backup Boot Procedures

When a PXM45 card starts up, it first loads the boot software on the card. If the PXM45 cannot load the

runtime firmware, the card continues to run the boot software in what is called backup boot mode. The

backup boot prompt is as follows:

pxm45bkup>

Some switch procedures, such as PXM45 card initialization and boot software upgrades, must be

performed in backup boot mode. This appendix describes the following procedures:

• Changing to PXM45 Backup Boot Mode

• Browsing the File System in Backup Boot Mode

• Locating Software Updates

• Transferring Software Files to and from the Switch

• Clearing the Switch Configuration

• Initializing the PXM45 Hard Disk

Changing to PXM45 Backup Boot Mode

You must enter PXM45 backup boot mode to perform certain configuration procedures such as burning

boot software. The following procedure describes how to switch to backup boot mode.

Step 1 Establish a CLI session with the PXM45 card using the CP port on the UI-S3 back card and a user name

with CISCO_GP privileges.

Note A CP port session is required because you will be resetting the node and entering commands in

“Backup Boot mode,” which is not accessible through other connection methods.

Step 2 At the switch prompt, enter the sh command to switch to the PXM45 shell mode.

mgx8850a.7.PXM.s > sh

The switch will display the following shell mode prompt:

pxm45>