AOS Release 6.4.6.R01 Release Notes November 2013
Downgrading - Step 2. Downgrade Uboot/Miniboot and AOS
Follow the steps below to downgrade the Uboot/Miniboot and AOS. This step will downgrade both
Uboot/Miniboot and AOS once the switch or stack is rebooted. Note the following:
• The CMMs must be certified and synchronized and running from Working directory.
• This procedure will require a reboot of the switch or stack.
• Make sure the destination paths are correct when transferring the files. Also, when the
transfer is complete, verify the file sizes are the same as the original indicating a
successful binary transfer.
1. Download and extract the downgrade archive from the Service & Support website. The archive
will contain the files to be used for the downgrade.
• Uboot/Miniboot Files (if required)
• AOS Files – (required)
2. FTP (Binary) the Uboot/Miniboot files listed above to the /flash directory on the primary CMM, if
required.
3. FTP (Binary) the image files listed above to the /flash/working directory on the primary CMM.
4. Execute the following CLI command to update the Uboot/Miniboot on the switch(es) (can be a
standalone or stack).
-> update uboot all
-> update miniboot all
If connected via a console connection update messages will be displayed providing the status of
the update.
If connected remotely update messages will not be displayed. After approximately 10 seconds
issue the ‘show ni’ command, when the update is complete the UBOOT-Miniboot Version will
display the downgraded version.
WARNING: DO NOT INTERRUPT the downgrade process until it is complete. Interruption of
the process will result in an unrecoverable failure condition.
5. Reboot the switch. This will update both the Uboot/Miniboot and AOS.
-> reload working no rollback-timeout
6. Once the switch reboots, certify the downgrade:
If you have a single CMM enter:
-> copy working certified
If you have redundant CMMs enter:
-> copy working certified flash-synchro
OmniSwitch 6850E/6855/9000E------ Release 6.4.6.R01 Page 63 of 80
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