Specifications

A-7
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
Non-Graceful PXM45, AXSM, and FRSM-12 Runtime Software Upgrades
Ungraceful upgrades disrupt all switch traffic and are usually used in lab installations where the use of
standalone cards provides no opportunity for a graceful upgrade. The quickstart procedure is provided
as an overview and as a quick reference for those who have already performed ungraceful upgrades on
the switch.
Note If you plan to upgrade PXM45 cards and AXSM or FRSM-12 cards, upgrade the PXM45 cards first. Wait
until the PXM45 cards are operating in active and standby modes with the correct software before
upgrading AXSM or FRSM-12 cards. The software version used by the PXM45/B cards should be equal
to or later than the version used on the AXSM, AXSM/B, AXSM-E, AXSM-32-E, or FRSM-12 cards.
When AXSM or FRSM-12 boot software is to be upgraded, it should be upgraded before upgrading the
runtime software.
Note Avoid making configuration changes while upgrading PXM45 software. Configuration changes can be
lost when the PXM45 is reset during the upgrade.
Note Cisco Systems recommends that you upgrade software on one AXSM or FRSM-12 card at a time within
a switch. Wait until each AXSM or FRSM-12 card upgrade is complete before starting an upgrade on
another AXSM or FRSM-12 card.
Step 7
runrev <slot> <revision>
dspcd
dspcd <slot>
Switch over to the standby PXM45 card and load the new runtime
software on the new standby (non-upgraded) PXM45.
Step 8
commitrev <slot> <revision> This command prevents an accidental switch back to a previous
software revision if someone enters the abortrev command.
Enter the commitrev command after the former active PXM45
comes up in the standby-U state. Cisco Systems recommends that
you avoid configuration changes until after you have run the
commitrev or abortrev commands.
See the “Aborting a Runtime Software Upgrade” section and the
“Committing to a Runtime Software Upgrade” section, both of
which appear later in this appendix.
Command Purpose