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Downgrade firmware from WING version 5.8.1 to 5.5.6 encounters hardware error message

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TitleDowngrade firmware from WING version 5.8.1 to 5.5.6 encounters hardware error message
Symptoms
Downgrading firmware from WING version 5.8.1 to 5.5.6 encounters hardware / software incompatiblity error message = Update error: aborted,hw and sw versions are incompatible - occurs 3 times and bumps to # prompt
Environment
  • WING
  • Access Point
  • Firmware Downgrade
  • AP8122
  • AP8132
  • AP8163
  • AP8222
  • AP8232
  • AP-8122
  • AP-8132
  • AP-8163
  • AP-8222
  • AP-8232
Cause
WiNG 5.8.1 added support for new NAND chipset for AP 8122, AP 8132, AP 8163, AP 8222
and AP 8232
Resolution
WiNG 5.8.1 added support for new NAND chipset for AP 8122, AP 8132, AP 8163, AP 8222
and AP 8232. APs manufactured with new NAND cannot be downgraded to prior version.


 
Additional notes
PMB #2731 - Product Marketing Bulletin:
Description: AP-8XXX: Component Change
Reason for Change: PMB2731: Component change on the AP-8XXX family and SW support implications

Zebra’s WLAN product family of AP-8XXX access points have a NAND component that will be going end of life in Jan 2016. A new NAND chip has been qualified and will be rolled into manufacturing when the existing NAND quantities run out.
To support the new NAND chip, updated SW is required. The recently released WiNG 5.8.1 adds this support. All APs manufactured with the new NAND will have WiNG 5.8.1 loaded on them. Additionally as units will not function properly on older code versions, the WiNG 5.8.1 software will prevent SW downgrade on APs in which the new NAND is detected.
WiNG 5.8.1 and all future WiNG releases will be capable of supporting units with the old NAND chip as well as units with the new NAND chip.

2. Impacting Configurations
The following AP models are impacted by this NAND change. As HW revision levels can vary by SKU, the anticipated Rev level for units with the new NAND is listed for assistance in easily identifying a unit that has a new vs. an old NAND.
An AP’s revision level can be found on the external box label, or on the regulatory label found on the back of the unit.

Table showing Rev Level with new NAND

Frequently Asked Questions:

Q: Is WiNG code that works with the new NAND backwards compatible with units that feature
the old NAND?
A: Yes, units with the old NAND chip can run WiNG 5.8.1 or later releases with no issue.

Q: What is the exact date in which APs with the new component will ship?
A: Zebra cannot provide a precise date as older HW units may still be available in warehouses and
through distribution even after cutover in manufacturing. With our current volumes we expect that all
units leaving the factory by Jan 2016 will feature the new NAND.

Q: How do I know what revision level my AP is?
A: An AP’s revision level can be found on the external box label, or on the regulatory label found on
the back of the unit

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