Specifications

A-33
Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
Appendix A Downloading and Installing Software Upgrades
Upgrade Procedures for PXM Cards and Service Modules
Step 3 To verify that the load command was processed correctly, enter the dspcd <slot> command and check
the status of the software revision levels. You can also view the revision levels with the dsprevs
command.
Note In a standalone configuration, the switch does not start the upgraded software until the runrev command
is entered. In a redundant configuration, the switch starts the upgraded software on the standby card. The
standby card does not become active until the runrev command is entered.
Starting the Upgrade Software
After you load the runtime upgrade software for a PXM or service module, enter the runrev command
to start using the software. The version levels for graceful and non-graceful upgrades change as shown
earlier in Table A-2 and Table A-3. The following procedure describes how to start the upgrade software.
Step 1 To start using the new runtime software version on a PXM card or service module card, enter the
following command:
mgx8850a.7.PXM.a > runrev <slot> <revision>
Replace <slot> with the card slot number, and replace <revision> with the software version number
specified with the loadrev command. For graceful upgrades, you can specify either the active or the
standby card. The switch software will automatically run the upgrade software on the standby card when
it is installed. The following example shows how to enter this command:
mgx8850a.7.PXM.a > runrev 7 4.0(0.0)
The active card is reset, and the former standby card comes up in the active-U state.
Step 2 When prompted to confirm the command, type y and press Return to continue.
Step 3 To verify that the load command was processed correctly, enter the dspcd <slot> command and check
the status of the software revision levels. You can also view the revision levels with the dsprevs
command.
Step 4 When the former active card comes up in the standby-U state, enter the commitrev command to commit
to that software version. This step is optional.
After the runrev command is entered, the switch starts running the new software revision. The
secondary software revision shows that a previous revision is still available. Whenever the secondary
software revision is different from the primary and current software revisions, you can revert back to the
secondary software revision as described in the “Aborting a Runtime Software Upgrade” section later in
this appendix.
Aborting a Runtime Software Upgrade
After upgrading PXM or service module runtime software, you can revert to the previously used version
of software as long as you have not used the commitrev command to finalize the upgrade. The
commitrev command is described in the next section.