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Junos Software Versions - Suggested Releases to Consider and Evaluate

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Article ID: KB21476 KB Last Updated: 13 May 2021Version: 329.0
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 Ethernet Switches

Platform Junos Software by Platform Last
Updated
EX2200 (See Note 3) Junos 12.3R12-S15  9 Mar 2020
EX2200-C ( See Note 3) Junos 12.3R12-S15  9 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  9 Mar 2020
EX3300 ( See Note 4) Junos 12.3R12-S15  9 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  9 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
EX4500  Junos 12.3R12-S15 / 15.1R7-S6  9 Mar 2020
EX4550  Junos 12.3R12-S15 / 15.1R7-S6  9 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  9 Mar 2020
EX8200 (See Note 2) Junos 12.3R12-S15 / 15.1R7-S6  9 Mar 2020
EX8200-VC (XRE200) (See Note 2 ) Junos 12.3R12-S15 / 15.1R7-S6  9 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-S1
Junos 20.2R2-S2
Standard 24 Feb 2021
ACX710 Junos 20.2R2-S2 Standard 24 Feb 2021
ACX1000 Junos 19.4R3-S1
Junos 20.2R2-S2
Standard 24 Feb 2021
ACX1100 Junos 19.4R3-S1
Junos 20.2R2-S2
Standard 24 Feb 2021
ACX2000 Junos 19.4R3-S1
Junos 20.2R2-S2
Standard 24 Feb 2021
ACX2100 Junos 19.4R3-S1
Junos 20.2R2-S2
Standard 24 Feb 2021
ACX2200 Junos 19.4R3-S1
Junos 20.2R2-S2
Standard 24 Feb 2021
ACX4000 Junos 19.4R3-S1
Junos 20.2R2-S2
Standard 24 Feb 2021
ACX5448 Junos 20.2R2-S2 Standard 24 Feb 2021
ACX5048 / ACX5096 Junos 20.2R2-S2 Standard 24 Feb 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-S3
Junos 19.2R1-S4
26 Jan 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
Junos 19.4R3
11 Nov 2020
MX Series with MX-SPC3 Junos 19.4R3 15 Oct 2020
MX 2008/2010/2020 Junos 17.3R3-S10
Junos 17.4R3-S3  (MIC-MACSEC)
Junos 20.1R1-S4 (MPC11)
11 Nov 2020
MX240/480/960 with SCBE3 Junos 19.3R3-S1
Junos 19.4R3-S1
Junos 20.2R2-S3
 1 Apr 2021
MX240/480/960 with MPC10E Junos 19.4R3-S1
Junos 20.2R2-S3
 1 Apr 2021
MX5, MX10, MX40, MX80, MX104 Series Junos 17.3R3-S10
Junos 19.4R3

11 Nov 2020
MX150, MX204, MX10003 Series Junos 19.4R3 11 Nov 2020
MX10008 Series Junos 19.3R2-S2
Junos 19.4R3
11 Nov 2020
MX10016 Series Junos 19.3R2-S2
Junos 19.4R3
11 Nov 2020
MX Subscriber Management(*1) Junos 19.4R3 15 Oct 2020
MX Services on MS-DPC Junos 17.3R3-S3 23 July  2019
MX Services on MS-MPC/MIC(*3) Junos 19.4R3 15 Oct 2020
vMX / vBNG(*2) Junos 19.4R3 15 Oct 2020
 

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 19.3R2-S2 nfx-3 Service 11 May 2020
NFX250 Junos 18.4R3 nfx-2 Standard 11 May 2020
NFX250-NG Junos 19.4R1 nfx-3 Standard 11 May 2020
NFX350 Junos 19.4R1 nfx-3 Standard 11 May 2020

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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 / 20.2R2-S2 and subsequent service releases 24 Feb 2021
QFX5200 Junos 18.4R2-S5 and subsequent service releases / 20.2R2-S2 and subsequent service releases 24 Feb 2021
QFX5110 Junos 18.4R2-S5 and subsequent service releases / 20.2R2-S2 and subsequent service releases 24 Feb 2021
QFX5120-32C Junos 19.1R3-S2 and subsequent service releases / 20.2R2-S2 and subsequent service releases 24 Feb 2021
QFX5120-48Y Junos 18.4R2-S5 and subsequent service releases / 20.2R2-S2 and subsequent service releases 24 Feb 2021
QFX5120-48T Junos 20.2R2-S2 and subsequent service releases 24 Feb 2021
QFX5210 Junos 18.4R2-S5 and subsequent service releases / 20.2R2-S2 and subsequent service releases 24 Feb 2021
QFX10002 / QFX10008 / QFX10016 Junos 18.4R2-S5 and subsequent service releases / 20.2R2-S2 and subsequent service releases 24 Feb 2021
QFX10002-60C Junos 19.1R3-S2 and subsequent service releases / 20.2R2-S2 and subsequent service releases 24 Feb 2021
EVPN-VXLAN Fabric CRB (Centrally Routed Bridging) Junos 18.4R2-S5 and subsequent service releases / 20.2R2-S2 and subsequent service releases 24 Feb 2021
EVPN-VXLAN Fabric ERB ( Edge Routed Bridging)  Junos 18.4R2-S5 and subsequent service releases / 20.2R2-S2 and subsequent service releases 24 Feb 2021
IP-Fabric ( QFX10K and QFX5K) Junos 18.4R2-S5 and subsequent service releases / 20.2R2-S2 and subsequent service releases    24 Feb 2021
VCF-QFX5110 Junos 17.4R2 latest service release        17 Nov 2020
VCF-QFX5100 Junos 17.4R2 latest service release / 20.2R2-S2 and subsequent service releases      24 Feb 2021
VC-QFX5100 Junos 17.4R2 latest service release / 20.2R2-S2 and subsequent service releases  24 Feb 2021
VC-QFX5110 Junos 17.4R2 latest service release / 20.2R2-S2 and subsequent service releases   24 Feb 2021
VC-QFX5120 Junos 20.2R2-S2 and subsequent service releases 24 Feb 2021
VC-QFX5200 Junos 17.4R2 latest service release / 20.2R2-S2 and subsequent service releases 24 Feb 2021
MC-LAG (QFX5K) Junos 20.2R2-S2 and subsequent service releases 24 Feb 2021
MC-LAG (QFX10K) Junos 20.2R2-S2 and subsequent service releases 24 Feb 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.

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Modification History:
  • 2021-05-11: Update PTX Junos Evolve software to 20.4R2-EVO for all PTX Evo platforms
  • 2021-05-04: Update SRX5k to 19.4R3 due to PR 1501752
  • 2021-04-26: Updating SRX1500 to 20.2R3, due to cosmetic fan alarm issue PR1546132 leading to unnecessary RMA's. Also updated SRX380 from 20.2R2 to 20.2R3.
  • 2021-04-13: Updated SRX notes due to upgrade issue from 15.1X49 to 19.4R3-S2 (PR1572963)
  • 2021-04-09: Update Junos-EVO suggestion from 20.4R1-EVO to 20.4R1-S1-EVO
  • 2021-04-02: Removed Note #2 for MX section as MS-DPC is EOL.
  • 2021-04-01: Update MX with 20.2R2-S2 to 20.2R2-S3
  • 2021-03-09: Added a note regarding SRX upgrade from 15.1X49 to later releases.
  • 2021-02-24: Added 20.2R2-S2 for MPC10
  • 2021-02-19: Removed 19.3 from MPC10 Suggested Software, moving to 19.4R3-S1
  • 2021-01-26: Added PTX10001. Update PTX running Junos Evolved to add "Deployment" vs. "Qualify" Software Version (see KB33938 for detail)
  • 2021-01-07: Added PTX10004. Update PTX running Junos Evolved to be 20.4R1-EVO
  • 2021-01-06: Updated for SRX platforms
  • 2020-11-17: Added QFX Architecture( VCF, VC, MC-LAG, IP-Fabric) recommendations provided by QFX PLM to 18.4R2-S5 or later and 20.2R2.
  • 2020-11-13: Update most of MX series - update to latest SR, added 19.4R3 for most platforms
  • 2020-11-03: Fixing typo for PTX from 19.2R2-S4 (no such version) to 19.1R2-S4. Consolidate MX2008/2010/2020 to be the MX2000 series.
  • 2020-10-16: Updated for SRX platforms the 12.3X48 release to D105, which is the final release for the 12.3X48 version. Also added an additional note.
  • 2020-10-02: Updated the MS-SPC3/MS-MPC releases. Fixed typo in MX240/480/950 with SCBE3 to MX240/480/960 with SCBE3.
  • 2020-08-24: Consolidate PTX series to simplify the display. Create pointer to KB33938 for detail information
  • ​2020-07-29: Updated SRX4600 from 18.4R3-S4 to 18.4R3-S3 due to an issue which may occur during installation of 18.4R3-S4 (PR1528203)
  • 2020-07-16: Updated SRX, PTX10003 platforms
  • 2020-07-09: MX Subscriber Management and vBNG recommendations modified to 19.1R3-S1 and 19.4R1-S2
  • 2020-07-07: Updated SRX Note 4 about direct upgrade from Junos 15.1X49 to 18.4R3. Added the exception for SRX5k due to PR1505864
  • 2020-06-26: Updated ACX5448
  • 2020-06-16: Updated SRX Note 4 about direct upgrade from Junos 15.1X49 to 18.4R3
  • 2020-06-05: Updated SRX5k platform with RE3 / SCB4 / IOC4 and added a note.
  • 2020-06-01: Update MX2000s with MPC11E to be 20.1R1 - reason - MACSEC support and feature parities
  • 2020-05-15: Update PTX10003 to be 19.4R2-S1-EVO
  • 2020-05-12: Adding MPC10E - previously missing from the list
  • 2020-05-11: Added NFX Series section, and NFX platforms
  • 2020-04-24: Updated SRX platforms
  • 2020-04-21: Update MX, PTX software. Adding PTX10003, PTX10008 with LC1201-36CD and JNP10008-SF3
  • 2020-03-30: Updated SRX Note3 for more precise listing of unsupported features in current JRR 18.2 versions.
  • 2020-03-30: Added SRX380 platform
  • 2020-03-02: Updated the SRX platforms which support up to Junos 12.3X48 releases
  • 2020-01-29: Remove 16.1 from M-Series since their last version is 15.1
  • 2020-01-22: Updated ACX5448
  • 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

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