# F5 Software Downgrade from version 17.x.x to 15.x.x

**URL:** <https://community.f5.com/t/f5-software-downgrade-from-version-17-x-x-to-15-x-x/76889>\
**Category:** Technical Forums\
**Tags:** big-ip, f5os\
**Created:** [February 7, 2026, 2:20am UTC](https://community.f5.com/t/f5-software-downgrade-from-version-17-x-x-to-15-x-x/76889 "2026-02-07T02:20:58Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![richaed](https://avatars.discourse-cdn.com/v4/letter/r/ba8739/32.png) [@richaed](https://community.f5.com/u/richaed)\
**Post date:** [February 7, 2026, 2:20am UTC](https://community.f5.com/t/f5-software-downgrade-from-version-17-x-x-to-15-x-x/76889/1 "2026-02-07T02:20:58Z")

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After upgrading from version 15.x.x to 17.x.x, I attempted to downgrade from 17.x.x back to 15.x.x.

However, the log continuously displayed “logger[xxxxx]:Re-stating devmgmtd”, and the prompt remained in the “INOPERATIVE” state.

Could you please provide the correct procedure for performing a version downgrade?

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**Author:** ![BramsBytes](https://d1p9zq3aats0t8.cloudfront.net/user_avatar/community.f5.com/bramsbytes/32/22246_2.png) [@BramsBytes](https://community.f5.com/u/BramsBytes)\
**Post date:** [February 8, 2026, 7:04pm UTC](https://community.f5.com/t/f5-software-downgrade-from-version-17-x-x-to-15-x-x/76889/2 "2026-02-08T19:04:41Z")

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You should be able to boot from the partition that wasn’t updated.

But since both 15 and 16 are EOS you should focus on getting v17 to work. Did you create a support request from My F5 for this box?

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**Author:** ![Paulius](https://d1p9zq3aats0t8.cloudfront.net/user_avatar/community.f5.com/paulius/32/21698_2.png) [@Paulius](https://community.f5.com/u/Paulius)\
**Post date:** [February 12, 2026, 3:40am UTC](https://community.f5.com/t/f5-software-downgrade-from-version-17-x-x-to-15-x-x/76889/3 "2026-02-12T03:40:35Z")

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You shouldn’t have to perform an additional code install to downgrade from 17 to 15, it should be that you just boot into the old partition. When you boot into the old partition make sure you do not pick to install the configuration because it should already have the appropriate configuration. Personally, I would not rollback because version 15 is EOS.

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**Author:** ![richaed](https://avatars.discourse-cdn.com/v4/letter/r/ba8739/32.png) [@richaed](https://community.f5.com/u/richaed)\
**Post date:** [February 13, 2026, 9:08am UTC](https://community.f5.com/t/f5-software-downgrade-from-version-17-x-x-to-15-x-x/76889/4 "2026-02-13T09:08:25Z")

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Thank you for your response.

After reinstalling the OS, I was able to downgrade the version successfully.