Specifications

A-3
Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide
Release 3, Part Number 78-14788-01 Rev. C0, January 2004
Appendix A Downloading and Installing Software Upgrades
Quickstart Procedures for Software Upgrades
Graceful PXM45 Boot Upgrades
When performed properly, graceful upgrades have minimal impact on connections in progress and do
not interrupt any established connections.
When a boot software upgrade is required, the procedure for upgrading redundant PXM45 cards is as
follows:
1. Manually upgrade the boot software on the standby PXM45.
2. Switch cards to make the upgraded standby card active.
3. After the standby card becomes the active card, manually upgrade the non-active card.
This process ensures a smooth transition to the new software and preserves all established calls. During
the short period when the roles of the active and standby cards are switched, all calls that are not
established are lost.
Note Avoid making configuration changes while upgrading PXM45 software. Configuration changes can be
lost when the PXM45 is reset during the upgrade.
To upgrade the runtime software, use the following procedure.
Command Purpose
Step 1
ftp Copy the boot and runtime files you want to use to the switch.
See the “Copying Software Files to the Switch” section, which
appears later in this appendix.
Step 2
username
password
Establish a CLI session with the standby PXM45 card using the
CP port on the UI-S3 back card and a user name with CISCO_GP
privileges.
Step 3
saveallcnf This optional step saves the current configuration to the hard disk.
See the “Saving a Configuration” section in Chapter 7, “Switch
Operating Procedures.”
Step 4
sh
sysBackupBoot
<Return> (2.0.11 and earlier)
Change to the PXM45 backup boot mode.
Note The software versions 2.0.11 and earlier require you to
press Return during the reboot sequence to enter backup
boot mode.
See the “Changing to PXM45 Backup Boot Mode” section in
Appendix B, “PXM45 Backup Boot Procedures.”
Step 5
sysPxmRemove At the backup boot prompt, enter the sysPxmRemove command.
This step prevents the active card from resetting the standby card
while you are working with it.
Step 6
sysFlashBootBurn “Filename”
reboot
username
password
dspcd
Burn the boot code. Remember to enter quotation marks before
and after the boot software filename. For example:
sysFlashBootBurn "C:FW/pxm45_003.000.000.000_bt.fw"
See the “Upgrading PXM45 Boot Software” section, which
appears later in this appendix.