Junos Software Versions - Suggested Releases to Consider and Evaluate

Summary:

Juniper provides this document as a means to help customers and Juniper manufacturing select a Junos software version that aligns with their deployment needs. The releases listed below have performed well for the general population, but note that due to the uniqueness of our customer network deployments to include areas such as design, traffic patterns/flows, and specific usage of features and functionality, Juniper recommends that all customers A) read the associated Release Notes to understand how features, functionality, fixes, and any known outstanding issues may apply to your specific network and applications, and B) test and certify the suggested code version(s) to ensure they will perform as expected in your network.

This article applies to the following devices:

• EX Series
• M, T, and MX Series
• ACX Series
• NFX Series
• QFX Series
• SRX Series

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

Notes:

1. The software versions included in this article are selected by utilizing input from Juniper Engineering, customers, and analysis of field usage data.
2. To be automatically notified of updates to this document, use the Subscribe link. If you do not see the Subscribe link, log in with your user account.
3. ​Juniper Networks offers optional fee-based services to further aide customers in selecting and testing software releases. If interested in more information, please contact your Juniper Sales Representative to discuss offering details and pricing.

Symptoms:

For use by customers and Juniper manufacturing planning an upgrade or initial installation.

Exceptions for evaluating these suggested software versions include:

• A Juniper Engineer has recommended that a customer use a specific version of Junos software that is different from what is listed here in this article.

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

• Your currently installed version of Junos is meeting your requirements as is.

• If you use NSM, refer to the NSM & Junos Compatibility Matrix to make sure the suggested 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/

Solution:

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

Suggested Junos Software Versions for your consideration and evaluation are listed in the tables below. 

NOTE: To locate a Junos release containing an 'S' (i.e. Junos 17.3R3-S3), on the Software Download product page change the OS drop-down from Junos to Junos SR

 

Select to jump to a platform series:

EX Series	M, T, PTX, MX Series	ACX Series
NFX Series	QFX Series	SRX Series

 

EX Series Ethernet Switches

Platform	Junos Software by Platform	Last Updated
EX2200 (See Note 3)	Junos 12.3R12-S15	09 Mar 2020
EX2200-C ( See Note 3)	Junos 12.3R12-S15	09 Mar 2020
EX2300	Junos 18.2R3-Latest Service Release / 20.2R3 or Latest Service Release	21 Apr 2021
EX2300-C	Junos 18.2R3-Latest Service Release / 20.2R3 or Latest Service Release	21 Apr 2021
EX3200	Junos 12.3R12-S15 / 14.1X53-D40	09 Mar 2020
EX3300 ( See Note 4)	Junos 12.3R12-S15	09 Mar 2020
EX3400	Junos 18.2R3-Latest Service Release / 20.2R3 or Latest Service Release	21 Apr 2021
EX4200	Junos 12.3R12-S15 / 15.1R7-S6	09 Mar 2020
EX4300	Junos 18.4R2-Latest Service Release / 20.2R3 or Latest Service Release	21 Apr 2021
EX4300-MP	Junos 18.4R2-Latest Service Release / 20.2R3 or Latest Service Release	21 Apr 2021
EX4400	Junos 21.1R2	23 Aug 2021
EX4500	Junos 12.3R12-S15 / 15.1R7-S6	09 Mar 2020
EX4550	Junos 12.3R12-S15 / 15.1R7-S6	09 Mar 2020
EX4600	Junos 18.4R2-Latest Service Release / 20.2R3 or Latest Service Release	21 Apr 2021
EX4650	Junos 18.4R2-Latest Service Release / 20.2R3 or Latest Service Release	21 Apr 2021
EX6200	Junos 12.3R12-S15 / 15.1R7-S6	09 Mar 2020
EX8200 (See Note 2)	Junos 12.3R12-S15 / 15.1R7-S6	09 Mar 2020
EX8200-VC (XRE200) (See Note 2 )	Junos 12.3R12-S15 / 15.1R7-S6	09 Mar 2020
EX9200	Junos 18.4R2-Latest Service Release / 20.2R3 or Latest Service Release	21 Apr 2021
EX9251	Junos 18.4R2-Latest Service Release / 20.2R3 or Latest Service Release	21 Apr 2021
EX9253	Junos 18.4R2-Latest Service Release / 20.2R3 or Latest Service Release	21 Apr 2021
Junos Fusion Enterprise (JFE)	Junos 18.4R2-Latest Service Release / 20.2R3 or Latest Service Release	21 Apr 2021

 

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 .

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ACX Series Service Routers

Platform	Junos Software by Platform	Release Type	Last Updated
ACX500	Junos 19.4R3-S3 Junos 20.2R3	Standard	02 Jun 2021
ACX710	Junos 20.2R2-S2	Standard	02 Jun 2021
ACX1000	Junos 19.4R3-S3 Junos 20.2R3	Standard	02 Jun 2021
ACX1100	Junos 19.4R3-S3 Junos 20.2R3	Standard	02 Jun 2021
ACX2000	Junos 19.4R3-S3 Junos 20.2R3	Standard	02 Jun 2021
ACX2100	Junos 19.4R3-S3 Junos 20.2R3	Standard	02 Jun 2021
ACX2200	Junos 19.4R3-S3 Junos 20.2R3	Standard	02 Jun 2021
ACX4000	Junos 19.4R3-S3 Junos 20.2R3	Standard	02 Jun 2021
ACX5448	Junos 20.2R3	Standard	02 Jun 2021
ACX5048 / ACX5096	Junos 20.2R3	Standard	02 Jun 2021

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M, T, PTX, and MX Series Routers

Platform	Junos Software by Platform	Last Updated
M Series	Junos 15.1R7	29 Jan 2020
T Series (all including TX, TXP, TXP-3D)	Junos 15.1R7 Junos 16.1R7	21 Apr 2020
PTX Series (See KB33938 for detail)     (Except ones listing below)	Junos 17.3R3-S10 Junos 17.4R2-S10 Junos 18.2R3-S8 Junos 19.2R1-S4 Junos 19.3R3-S3	10 Aug 2021
PTX10001-36MR	Junos Evolved 20.4R2-EVO	11 May 2021
PTX10003	Junos Evolved 20.4R2-EVO	11 May 2021
PTX10004	Junos Evolved 20.4R2-EVO	11 May 2021
PTX10008/16 with FAN2/AC2/DC2 Components     (Do not use if deploy - JNP10008-SF3)	Junos 19.2R1-S4	21 Apr 2020
PTX10008 with PTX10K-LC1201-36CD and JNP100008-SF3 JNP10K-RE1-E	Junos Evolved 20.4R2-EVO	11 May 2021
PTX10008 with PTX10K-LC1202 and JNP100008-SF3 JNP10K-RE1-E	Junos Evolved 20.4R2-EVO	11 May 2021
MX Series	Junos 17.3R3-S10 Junos 18.4R2-S5 Junos 19.3R3-S2 Junos 19.4R3-S3	01 Jun 2021
MX Series with MX-SPC3	Junos 19.4R3-S3	02 Jun 2021
MX 2008/2010/2020	Junos 17.3R3-S10 Junos 17.4R3-S3  (MIC-MACSEC) Junos 20.1R2-S1 (MPC11)	11 Nov 2020
MX240/480/960 with SCBE3	Junos 19.3R3-S2 Junos 19.4R3-S3 Junos 20.2R3-S1	01 Jun 2021
MX240/480/960 with MPC10E	Junos 19.4R3-S3 Junos 20.2R3-S1	01 Jun 2021
MX5, MX10, MX40, MX80, MX104 Series	Junos 17.3R3-S10 Junos 19.4R3-S3	01 Jun 2021
MX150, MX204, MX10003 Series	Junos 19.4R3-S3 Junos 20.2R3-S1 Junos 20.4R2	01 Jun 2021
MX10008 Series	Junos 19.3R3-S2 Junos 19.4R3-S3	01 Jun 2021
MX10016 Series	Junos 19.3R3-S2 Junos 19.4R3-S3	12 Nov 2021
MX Subscriber Management(*1)	Junos 19.4R3-S3	02 Jun 2021
MX Services on MS-DPC	Junos 17.3R3-S3	23 July  2019
MX Services on MS-MPC/MIC(*3)	Junos 19.4R3-S3	02 Jun 2021
vMX / vBNG(*2)	Junos 19.4R3-S3	02 Jun 2021

 

Notes:

1. This includes subscriber management deployments that incorporate services such as CGNAT, etc.
2. See KB33938 for detail information and directly downloadable links to software for M/MX/PTX/T-Series JUNOS Software
3. Recently released hardware may require a software version newer than listed above. Please use the latest Service Release for the required JUNOS software version
4. Due to feature parity recommended from Product Line Management
5. MPC11 is not supported in Junos 19.4

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NFX Series Network Services Platform

Platform	Junos Release	Software Architecture	Release Type	Last Updated
NFX150	Junos 20.2R2	nfx-3	Service	08 Jun 2021
NFX250	Junos 18.4R3	nfx-2	Standard	11 May 2020
NFX250-NG	Junos 20.2R2	nfx-3	Standard	08 Jun 2021
NFX350	Junos 20.2R2	nfx-3	Standard	08 Jun 2021

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QFX Series

Platform	Junos Software by Platform	Last Updated
QFX3500 / QFX3600	Junos 14.1X53-D54	26 May 2020
QFX5100	Junos 18.4R2-S5 and subsequent service releases / 20.2R3	01 Jun 2021
QFX5200	Junos 18.4R2-S5 and subsequent service releases / 20.2R3	01 Jun 2021
QFX5200-EVO	Junos Evolved 18.3R1-EVO	19 Aug 2021
QFX5110	Junos 18.4R2-S5 and subsequent service releases / 20.2R3	01 Jun 2021
QFX5120-32C	Junos 19.1R3-S2 and subsequent service releases / 20.2R3	01 Jun 2021
QFX5120-48Y	Junos 18.4R2-S5 and subsequent service releases / 20.2R3	01 Jun 2021
QFX5120-48T	Junos 20.2R3	01 Jun 2021
QFX5210	Junos 18.4R2-S5 and subsequent service releases / 20.2R3	01 Jun 2021
QFX10002 / QFX10008 / QFX10016	Junos 18.4R2-S5 and subsequent service releases / 20.2R3	01 Jun 2021
QFX10002-60C	Junos 19.1R3-S2 and subsequent service releases / 20.2R3	01 Jun 2021
EVPN-VXLAN Fabric CRB (Centrally Routed Bridging)	Junos 18.4R2-S5 and subsequent service releases / 20.2R3	01 Jun 2021
EVPN-VXLAN Fabric ERB ( Edge Routed Bridging)	Junos 18.4R2-S5 and subsequent service releases / 20.2R3	01 Jun 2021
IP-Fabric ( QFX10K and QFX5K)	Junos 18.4R2-S5 and subsequent service releases / 20.2R3	01 Jun 2021
VCF-QFX5110	Junos 17.4R2 latest service release/ 20.2R3	01 Jun 2021
VCF-QFX5100	Junos 17.4R2 latest service release / 20.2R3	01 Jun 2021
VC-QFX5100	Junos 17.4R2 latest service release / 20.2R3	01 Jun 2021
VC-QFX5110	Junos 17.4R2 latest service release / 20.2R3	01 Jun 2021
VC-QFX5120	Junos 20.2R3	01 Jun 2021
VC-QFX5120-32C	Junos 20.4R2 and subsequent service releases	01 Jun 2021
VC-QFX5200	Junos 17.4R2 latest service release / 20.2R3	01 Jun  2021
MC-LAG (QFX5K)	Junos 20.2R3	01 Jun 2021
MC-LAG (QFX10K)	Junos 20.2R3	01 Jun 2021
Junos Fusion Datacenter (JFD) - MC-LAG	Junos 17.3R3-S3	12 Feb 2019
Junos Fusion Datacenter(JFD) - EVPN	Junos 18.1R2-S2	28 Feb 2019
Qfabric (See Note 1)	Junos 14.1X53-D130	30 Jul 2019

 

Note:

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

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SRX Series Services Gateways

Platform	Junos Software by Platform	Release Type	Last Updated
vSRX	Junos 19.4R3-S1	Service	06 Jan 2021
vSRX 3.0	Junos 19.4R3-S1	Service	06 Jan 2021
SRX100H2 / SRX110H2 / SRX210HE2 / SRX220H2 / SRX240H2	Junos 12.3X48-D105	Standard	16 Oct 2020
SRX300 / SRX320 / SRX340 / SRX345	Junos 19.4R3-S1	Service	06 Jan 2021
SRX380	Junos 20.2R3	Standard	26 Apr 2021
SRX550	Junos 12.3X48-D105	Standard	16 Oct 2020
SRX550HM	Junos 19.4R3-S1	Service	06 Jan 2021
SRX650	Junos 12.3X48-D105	Standard	16 Oct 2020
SRX1400	Junos 12.3X48-D105	Standard	16 Oct 2020
SRX1500	Junos 20.2R3	Standard	26 Apr 2021
SRX3400 / SRX3600	Junos 12.3X48-D105	Standard	16 Oct 2020
SRX4100 / SRX4200	Junos 19.4R3-S1	Service	06 Jan 2021
SRX4600	Junos 19.4R3-S1	Service	06 Jan 2021
SRX5400 / SRX5600 / SRX5800 with SRX5K-RE3-128G (*1)	Junos 19.4R3	Standard	04 May 2021
SRX5400 / SRX5600 / SRX5800 with RE-1800X4 (*1)	Junos 19.4R3	Standard	04 May 2021
SRX5400 / SRX5600 / SRX5800 with SRX5K-RE-13-20 (*1)	Junos 12.3X48-D105(*2)	Standard	16 Oct 2020

 

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. Junos OS upgrade from 18.4R3 or 18.4R3 based Service Releases directly to 19.4R3 or 19.4R3 based Service Releases is supported for all SRX platforms.

4. Notes for upgrading from Junos 15.1X49 releases to 19.4R3 or 19.4R3 based Service Releases:

   • Junos OS upgrade from 15.1X49 directly to 19.4R3 or 19.4R3 based Service Releases is supported for all SRX platforms (ISSU is not supported). Note: PR1572963 - Junos OS upgrade from 15.1X49 directly to 19.4R3-S2 fails on SRX5400 / SRX5600 / SRX5800.

   • In case you would need to rollback or downgrade from 19.4 to the 15.1X49 release on SRX1500, SRX4100/4200, SRX5k or vSRX, all files on the device may be lost. Hence it is important to backup the relevant files (configuration, license-keys etc) before the upgrade and have console access during the upgrade and during a potential rollback if required.

   • For vSRX the following limitations apply when upgrading from 15.1X49 directly to 19.4R3 or 19.4R3 based Service Releases:

     • The file system mounted on /var usage must be below 14% of capacity.
       Check this with
       root@vsrx> show system storage | match " /var$"
/dev/vtbd1s1f 2.7G 82M 2.4G 3% /var
       Note: The CLI command ‘request system storage cleanup’ may help reach that percentage if needed

     • The Junos upgrade image must be placed in the directory /var/host-mnt/var/tmp/
       request system software add /var/host-mnt/var/tmp/

     • It is recommended to deploy a new vSRX VM instead of performing a Junos upgrade. That also gives the option to move from vSRX to the newer and more recommended vSRX 3.0.
        

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

   • Starting with Junos OS Release 17.3, when you upgrade from Junos OS Release 15.1X49 to Junos OS Release 17.3 or higher, or downgrade from Junos OS Release 17.3 or higher to Junos OS Release 15.1X49, you must update the IPS signature package by downloading and installing the IPS signature package update.