Description

When downgrading an NFX, from Junos 23.1 to a lower version of code, it may fail.  It will require an intermediate version of code first, before you can downgrade to the targeted release.

Symptoms

Unable to downgrade code from Junos 23.1 to a lower version.  The following symptom may appear:

root@t05-48> request vmhost software add /var/public/jinstall-host-nfx-3-x86-64-22.4R1.10-secure-signed.tgz
Verified jinstall-host-nfx-3-x86-64-22.4R1.10-secure-signed signed by PackageProductionECP256_2022 method ECDSA256+SHA256

t05-48 fpc0 Frame 3: sp = 0xe776c2f8, pc = 0x8077da0
Pushing Junos image package to the host...
File already present in Host. Skipping pushing the image
192.168.1.1: Connection refused
192.168.1.1: Connection refused
192.168.1.1: Connection refused
[: -ne: unexpected operator
192.168.1.1: Connection refused
192.168.1.1: Connection refused
Error: installation package not found
ERROR: Failed to add jinstall-host-nfx-3-x86-64-22.4R1.10-secure-signed.tgz
error: Host software installation has failed.
 

Solution

In order to downgrade from Junos 23.1 to a lower version of code, this requires a 2-step downgrade process.  The first step is to downgrade to one of the Junos versions listed below:

22.4R2 
22.3R2 
22.2R3 

Once you have downgraded to one of the interim releases, you can then downgrade to the desired Junos version.

Modification History

3/29/2023 - KB created
6/22/2023 - Removed release dates, as all referenced Junos releases are now available
1/16/2024 - Modified visibility from Internal Only to Internal, Partner, Customer and Public