Specifications

A-1

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

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

APPENDIX

Downloading and Installing Software Upgrades

This appendix describes how to locate, download, and install software updates for the switch. Because

software updates are stored in the switch file system, this appendix includes a section on browsing the

file system. This appendix includes the following sections:

• Upgrade Process Overview

• Quickstart Procedures for Software Upgrades

• Quickstart Procedures for Software Downgrades

• Browsing the File System

• Locating Software Updates

• Copying Software Files to the Switch

• Upgrade Procedures for PXM45, AXSM, and FRSM-12 Cards

• Upgrade Procedures for RPM-PR Cards

• Upgrading SCT Files

• Troubleshooting Upgrade Problems

Upgrade Process Overview

This appendix provides a series of quickstart procedures that describe how to perform graceful and

non-graceful upgrades to the switch. To perform a graceful upgrade on a switch card, the card must be

operating in redundant mode with another switch card of the same type. When performed properly,

graceful upgrades have minimal impact on connections in progress and do not interrupt any established

connections.

Note Graceful upgrades to Release 3.0 are supported from Releases 2.0.16 and 2.1.15.

When a card to be upgraded is not operating in redundant mode, you must do a non-graceful upgrade,

which disrupts all traffic that passes through the card. For PXM45 cards, an ungraceful upgrade

interrupts all traffic passing through the switch. For all other types of cards, an ungraceful upgrade

affects only the traffic that passes through that card.