The following procedure lists the commands required to upgrade a
redundant CPU/Fabric 8600:

Procedure summary:

 *  Backup config file
 *  Telnet to 8600, telnet from 8600 to Loop back address (Standby CPU)
 *  Copy files from TFTP Server to Standby Flash - confirm their presence
    (use dir command)
 *  Config Bootconfig to point to new files and save bootconfig
 *  Boot Standby off new boot image.
 *  Telnet to 8600 (Active CPU)
 *  Copy files from TFTP Server to Standby Flash - confirm their presence
    (dir command)
 *  Config Bootconfig to point to new files and save bootconfig
 *  Boot Standby off new boot image.

Before proceeding:

Start TFTP server with appropriate code level files in the base
directory.  This could be an 8600 with TFTP Daemon activated.

Ensure available space on flash or pcmcia devices.

Commands:

 *  Telnet x.x.x.x  and login as user "rwa" password "rwa" or use
    appropriate login.
 *  Passport-8606:6# save /flash/config.cfg /flash/recover.cfg      
    (make a back-up copy - tftp off to pc optionally

UPGRADE STANDBY CPU:

Telnet to the standby CPU from the Primary CPU:

 *  Passport-8606:6# Telnet 127.0.0.5  (standby is slot number 5 in this
    case)

The prompt will change from # to something else - no standby in lab to
test!!  I have chosen @ in my example.

 *  Passport-8606:5@ copy 47.184.30.86/p80b3200.img /flash/p80b3200.img
 *  Passport-8606:5@ copy 47.184.30.86/p80a3200.img /flash/p80a3200.img

Optionally copy both files to pcmcia:
 *          Passport-8606:5@ copy /flash/p80b3200.img
    /pcmcia/p80b3200.img
 *          Passport-8606:5@ copy /flash/p80b3200.img
    /pcmcia/p80b3200.img

(verify success by using DIR command to check flash before continuing)

 *  Passport-8606:5@ config bootconfig (enter)
 *  Passport-8606:5/config/bootconfig@  choice primary image-file
    /flash/p80a3200.img
 *  Passport-8606:5/config/bootconfig@  choice secondary image-file
    /pcmcia/p80a3200.img (optional)
 *  Passport-8606:5/config/bootconfig@  save bootconfig
 *  Passport-8606:5/config/bootconfig@  boot /flash/p80b3200.img

This will load the new boot image which will then load the new software
version automatically.  Standby is now running the new revision.  Primary
is still the active CPU and is at the old revision.  Your Telnet will be
terminated and you should be still have an active Telnet session with the
Primary CPU.  (Slot 6 in this example.)

To be conservative, Telnet to Standby via loop back address and verify
the card is running the new software version - you should see the revison
listed on the opening screen or use "show tech info all".  Logout of
Standby.

UPGRADE PRIMARY CPU:

We'll repeat the same exercise to upgrade the active CPU:

 *  Passport-8606:6# copy 47.184.30.86/p80b3200.img /flash/p80b3200.img
 *  Passport-8606:6# copy 47.184.30.86/p80a3200.img /flash/p80a3200.img

(Optionally copy both files to pcmcia:)
 *          Passport-8606:6# copy /flash/p80b3200.img
    /pcmcia/p80b3200.img
 *          Passport-8606:6# copy /flash/p80b3200.img
    /pcmcia/p80b3200.img
 *  Passport-8606:6# config bootconfig (enter)
 *  Passport-8606:6/config/bootconfig#  choice primary image-file
    /flash/p80a3200.img
 *  Passport-8606:6/config/bootconfig#  choice secondary image-file
    /pcmcia/p80a3200.img (optional)
 *  Passport-8606:6/config/bootconfig#  save bootconfig
 *  Passport-8606:6/config/bootconfig#  boot /flash/p80b3200.img

This will load new boot image which will then load new software version
automatically.  When you boot the Slot 6 Primary CPU, the switch will
fail over to the Slot 5 Standby CPU which will become the new Primary or
active CPU.  This will cause a disruption of traffic as the CPU learns
it's routes and pushes to the I/O modules, but the Standby will already
have been ready and waiting.

Telnet back into the switch and verify all is well.

I am on vacation through the end of the year but will be monitoring
e-mail in case you have questions or feedback. 

Here's wishing you both a great holiday. 

Cheers!

Ron