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‘##Tag for Delete##’[SRX] Description of Junos 12.1X44 Release



Article ID: KB27144 KB Last Updated: 25 Jun 2020Version: 4.0

Description of Junos 12.1X44 Release on SRX Series Devices



  • What is this new Junos 'X' release for SRX?
  • 12.1r5 vs 12.1.X44?  Which do I install?

Junos 12.1X44 Description

Juniper is using Junos OS base that is updated at a slower pace to release new security features at a faster cadence, using special security-focused releases called X releases. An explanation of the Junos 12.1x44 Release is documented in the following PSN:

JTAC Tech Bulletin (PSN):
New Software Release Model for Security Products : Initial release-12.1X44

Tip: The PDF attached in the PSN above explains 12.1X44 in detail.

These X releases are not temporary. The PSN attachment has the JTAC Support dates.

Which Junos software version do I install on my SRX?

Possible choices:
  • If you need the newest SRX features, which are in 12.1X44, (see New Features in Junos12.1X44 Release Notes),
    then install the latest version of 12.1X44.

    (12.1X44 has more features than 12.1 and is derived off of 12.1)

  • If you need the features in 12.1 (see New Features in Junos 12.1 Release Notes),
    then install the latest version of 12.1.

  • If you want the JTAC Recommended release, then refer to the JTAC Recommended releases,
    and install the recommended version.

Junos Download page:
Modification History:
. EOS software . No relevance now .Can be deleted .   
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