Specifications

A-17
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 Downgrades
Installing SCT Files
Use the procedure in this section when you need to manually install or upgrade SCT files.
If you are using CWM to install or upgrade SCT files in your network, refer to the Cisco WAN Manager
User’s Guide, Release 11
Note The following quickstart procedure is provided as an overview and as a quick reference for those who
have already performed SCT upgrades on the switch. For detailed instructions, see the “Upgrading SCT
Files” section, which appears later in this appendix.
Quickstart Procedures for Software Downgrades
Cisco Systems, Inc., recommends that you avoid software downgrades, which replace a current software
release with another that has a lower version number. However, there are some situations in which you
might want to downgrade the software. For example, if you have been testing pre-release software in a
lab, the software version number can be higher than a later official software release. Any time the
software version number to which you are changing is lower than the current software version, the
change is a downgrade, regardless of when the software versions are released.
The following sections provide quickstart procedures for the following downgrades:
• PXM45 and AXSM Boot Downgrades
• Non-Graceful PXM45 Runtime Software Downgrades
• Non-Graceful AXSM Runtime Software Downgrades
Command Purpose
Step 1
ftp Copy the new SCT files you want to use to the appropriate
C:SCT\<card_type> directory. For example, copy new AXSM or
FRSM-12 SCT files to the C:SCT\AXSM or C:SCT\FRSM
directory.
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 active PXM45 card using a user
name at any access level.
Step 3
addsct <oprtions> Select the slot in which the RPM-PR card is installed.
Step 4
switchcc
or
reboot
If you are upgrading the SCTs on redundant cards, switch the
roles of the active and standby cards. You need to upgrade the
SCTs on the non-upgraded card while it is in standby mode.
If you are upgrading the SCTs on non-redundant cards, reboot the
card to activate the new SCTs.
Step 5
dspscts Verify router reboot is complete.