Downgrade of unit’s bootrom version from 10.1.18T215 to 10.1.13T215

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To downgrade the unit’s bootrom version from 10.1.18T215 to 10.1.13T215 and firmware version from SPR8090j to SPR08080b

Unit firmware version details before downgrade:

#Show version

    UNIT 1: compiled on Jan 2 2021 at 21:08:45 labeled as SPR08090j

      (33554432 bytes) from Primary SPR08090j.bin (UFI)

        SW: Version 08.0.90jT213

      Compressed Primary Boot Code size = 786944, Version:10.1.18T215 (spz10118)

       Compiled on Mon Jul 20 08:53:15 2020

#Show flash

ICX7450

  Compressed Pri Code size = 33554432, Version:08.0.90jT213 (SPR08090j.bin)

  Compressed Sec Code size = 33554432, Version:08.0.90jT213 (SPR08090j.bin)

  Compressed Pri Boot Code size = 786944, Version:10.1.18T215 (spz10118)

  Compressed Sec Boot Code size = 786944, Version:10.1.18T215 (spz10118)

  Code Flash Free Space = 1626873856

#Show boot-monitor

ICX7450

Current Version:  10.1.18

Recommended Version:  10.1.18

Steps To Downgrade Boot Rom Version:

Bootrom version will be downgraded with the software version (Non UFI image)

1. Upload SPR8090j Non UFI image and boot the unit with this image:

         ICX7450 #copy tftp flash <tftp_server_ip> SPR08090j.bin primary

1. Upload first software image SPR8080b.bin and boot the system with this image:

         ICX7450 #copy tftp flash <tftp_server_ip> SPR08080b.bin primary 

1. Once the device is booted with this image, upload the bootrom version with the below command:

          ICX7450 #copy tftp flash <IP_Address> spz10113.bin bootrom

          ICX7450 #Load to buffer (8192 bytes per dot)

          ...............

         SYNCING IMAGE TO FLASH. DO NOT SWITCH OVER OR POWER DOWN THE UNIT (8192 bytes per dot) ...................................................................................................

TFTP to Flash Done.

  After saving configuration and reload, firmware is downgraded.

ICX7450 #Show version

Copyright (c) 2017 Ruckus Wireless, Inc. All rights reserved.

UNIT 1: compiled on Sep 8 2018 at 00:20:44 labeled as SPR08080b

(29815996 bytes) from Primary SPR08080b.bin

SW: Version 08.0.80bT213

Compressed Boot-Monitor Image size = 786944, Version:10.1.13T215 (spz10113)

Compiled on Tue Jul 29 10:22:26 2018

ICX7450 #show flash

Compressed Pri Code size = 29815996, Version:08.0.80bT213 (SPR08080b.bin)

Compressed Sec Code size = 33554432, Version:08.0.90jT213 (SPR08090j.bin)

Compressed Boot-Monitor Image size = 786944, Version:10.1.13T215

Code Flash Free Space = 1626591232

 ICX7450-48 # show boot-monitor

Current Version: 10.1.13

Recommended Version: 10.1.13

Note: Alternate way to downgrade the firmware by using Manifest file

Link: https://support.ruckuswireless.com/documents/3448-fastiron-08-0-95-ga-software-upgrade-guide

-----Above link describes an example of firmware downgrade by using Manifest file from UFI to non UFI.

-----Apart from the firmware downgrade from SPR8090j to SPR08080b (example taken above), this procedure can be used for downgrade of other firmware versions as well.