JTAC recommended versions of Junos software are listed to assist with determining which version of software to download and install.

This article applies to the following devices:

• EX Series

• M, T, and MX Series

• ACX Series

• QFX Series

• SRX Series
   

For other Junos devices, refer to the Release Notes and the Alerts column on the Download Software pages.

Important Software Upgrade Notification

Before loading a software release, Juniper recommends that you read the associated Release Notes to understand how features, functionality, fixes and any known outstanding issues will apply to your specific network and applications. A second sensible recommendation is for you to test the release in your lab whereby you emulate your topology and traffic flows where possible to further understand how your network will perform with the new release in your unique environment.

 Juniper offers optional services to aide customers in selecting and testing software releases. If interested in more information, please contact your Juniper Sales Representative to discuss offerings and pricing.

For customers planning an upgrade or initial installation, JTAC recommends the Junos software versions in this article. These versions are selected using input from Juniper Engineering, customers, and analysis of field usage data.

Exceptions to this include:

• JTAC has specifically recommended that customers use a version of Junos software that is different from what is listed.

• You require specific features (Feature Explorer) that are available only in another version of Junos software. In this case, be sure to download the latest maintenance release.

• Your currently installed version of Junos is working well.

• If you use NSM, refer to the NSM & Junos Compatibility Matrix to make sure the recommended Junos software version can be managed by NSM.
   

To see the list​ of End of Engineering (EOE) and EOS (End of Support) dates for specific Junos versions, please go to the Junos Dates & Milestones page: https://support.juniper.net/support/eol/software/junos/

To see features supported per specific Junos versions, please go the Juniper Pathfinder page and navigate to "Feature Explorer": https://apps.juniper.net/home/

To download Junos Software, go to the Software Download site and find your product.

The JTAC Recommended Junos Releases are in the tables below. 

Select to jump to a platform series:

EX Series Ethernet Switches

Notes:

1. It is highly recommended to refer to the Release Notes, Technical Documentation, and KB articles for any outstanding and resolved issues before making the upgrade decision. Contact JTAC if there are any queries.
2. Please refer to TSB16758 for minimum software requirements for newer revision EX8200 linecards.
3. Please refer TSB17138 for more details.
4. Please refer TSB17329 .

ACX Series Service Routers

M, T, PTX, and MX Series Routers

Notes:

1. This includes subscriber management deployments that incorporate services such as CGNAT, etc.
2. This release is also recommended for deployments that include both MS-MPC/MIC and MS-DPC modules within the same chassis.
3. See KB33938 for detail information and directly downloadable links to software for M/MX/PTX/T-Series JUNOS Software
4. Recently released hardware may require a software version newer than listed above. Please use the latest Service Release for the required JUNOS software version
5. Due to feature parity recommended from Product Line Management

QFX Series

Note:

1. Qfabric NSSU upgrade from Junos 12.2X50 to later releases is NOT recommended. Please see TSB16842 for more details.

SRX Series Services Gateways

Notes:

1. KB30446 - SRX Junos SRX5K Hardware / Software compatibility matrix.

2. TSB17655 - On SRX5000 series with SRX5k RE-13-20 a software upgrade to Junos release 12.3X48-D80, D85 or D90 may fail the pre-check due to insufficient space available on the compact flash.

3. Notes for upgrading from Junos 15.1X49 releases to 18.2R3 or 18.2R3 based Service Releases:

   • Junos OS upgrade from 15.1X49 directly to 18.2R3 or 18.2R3 based Service Releases is supported for all SRX platforms, except vSRX. To upgrade vSRX from 15.1X49 to higher versions, deploy a new vSRX VM.

   • ISSU is not supported when upgrading from Junos 15.1X49 to higher versions.

   • KB34945 - When Junos Space Security Director is used for managing the SRX configuration and the AppFW, IDP or UTM features are used, then when upgrading to Junos 18.2R1 or higher, the SRX configuration needs to be migrated to the new Unified Policies style and Security Director version 19.3 or higher is required.

   • When upgrading from Junos 15.1X49-D170 to Junos 18.2 releases, the following features will not be available after the upgrade:

     • GTP Inspection - GTP tunnel enhancements (SRX1500, SRX4100, SRX4200, SRX5400, SRX5600, SRX5800, and vSRX instances). This feature was introduced in 15.1X49-D140 and 18.3R1 and higher releases.
     • The following CSO / SD-WAN related features:
       • Application-based multipath support (SRX Series and vSRX)
       • Application quality of experience scaling support (SRX4100, SRX4200)
       • AppQoE support in high availability mode (SRX4100, SRX4200)
       • Application path selection based on link preference and priority (SRX300, SRX320, SRX340, SRX345, SRX550M, SRX1500, SRX4100 SRX4200, and vSRX)
       • Virtual routing and forwarding instances security features support (SRX300, SRX320, SRX340, SRX345, SRX550M, SRX1500, SRX4100, SRX4200, and vSRX)
       • VRF group in L3VPN traffic (SRX Series and vSRX)

    

2020-01-13: SRX platforms updated; Deleted row for SRX Branch devices with 1G RAM due to EOS reached (see TSB17084 and the Junos Dates & Milestones page for details)
2020-01-13: MX, PTX platforms updated: Removing 15.1R7 due to reaching EOS
2019-12-30: Adding MX-SPC3 with 19.3R2 as the minimum required software
2019-12-26: updated PTX10008/16 with AC2, DC2, FAN2 recommends 19.2R1-2
2019-12-13: non-technical format changes.
2019-12-13: updated MX10008 to 19.2R1-S2
2019-12-12: updated MX204, MX10003 from 17.4R2-S8 to 18.2R3-S1
2019-12-04: Add MX2000s with MPC11 and SFB3
2019-10-23: Corrected the download links for Junos 18.2R3 images at the SRX300 series and SRX550HM.

2019-10-21: Changed MSMPC/MSDPC recommendation from S5 to S3 due to session affinity changes in S4 that cause instability.

2019-10-15: Updated SRX300 series and SRX550HM to 18.2R3 from 18.2R3-S1 due to DHCP server issue PR1464267 affecting 18.2R3-S1 but not affecting 18.2R3.

2019-10-11: Cleanup for SRX table. Combined SRX100/200 platforms which have the same recommended release in a row. Removed notes for EOL releases. Updated note 2 to link to TSB17655.

2019-10-11: Updated MX Subscriber to release 18.2R3-S1

2019-09-30: Updated SRX4600, SRX5k-SPC3, SRX200, 300, 550(M), 650 series and SRX1k/3k, added new entries for the vSRX 3.0 and SRX5k RE3/IOC4/SCB4

2019-07-25: Updated MX Subscriber and MX Services information

2019-07-21: Adding "Important Software Upgrade Notification" in the beginning

2019-06-25: Add a link to KB33938 for details of M-Series, MX-Series, PTX-Series, and T-Series

2019-04-25: Corrected SRX download links

2019-04-16: Updated SRX releases

2019-04-10: Fixed QFabric and EX6200 links. 

2019-03-19: Removing EOL released from M-series, and T-series

2019-03-01: Added note on how to locate Junos release versions containing an 's'

2019-02-28: Updated for several SRX platforms; added link to Feature Explorer.

2019-01-30: Fixed broken links for MX and vMX.

2018-12-19: Updated JRR for SRX5k with SPC3

2018-10-15: Updated SRX JRR versions and removed SRX210B and SRX210H platforms due to EOS reached.

2018-10-05: SRX: Move direct link to JRR version to the middle column that references JRR version

2018-10-03: SRX: Added direct link to JRR version per platform

2018-09-26: Removed J-Series platforms, due to EOS reached.

2018-06-25: Updated releases for ACX, MX and vMX platforms.

2018-05-17: Corrected link to SRX4600's software download page.

2018-05-15: Updated the recommended release for ACX5048 / ACX5096

2017-11-16: Updated VRR to 16.2

2017-04-18: Added jump links for quick access to platform series sections