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Downgrade Instructions for NFX Series Devices Running Junos OS Release 23.1R1

On the NFX150, NFX250 NextGen, and NFX350 devices, you cannot downgrade Junos OS Release 23.1R1 directly to certain releases (listed in the Target Release column in Table 1). As a workaround, you can perform downgrade as a two-step activity, as described below:

  1. Downgrade the Junos OS Release 23.1R1 software to the corresponding intermediate release.

  2. Downgrade the software from the intermediate release to the target release.

Table 1 lists the target releases and the corresponding intermediate releases.

Table 1: Release Compatibility for Downgrading Junos OS 23.1R1 on NFX Series Devices
Target Release Intermediate Release
Any 22.4x release earlier than 22.4R2 22.4R2
Any 22.3x release earlier than 22.3R2. 22.3R2

  • Any 22.2x release earlier than 22.2R3.

  • Any 22.1x release or earlier releases.

 22.2R3