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Junos OS runs on the following Juniper Networks® hardware: ACX Series,

EX Series, M Series, MX Series, PTX Series, vSRX, QFabric, QFX Series, SRX Series, and T Series.

These release notes accompany Junos OS Release 15.1X49-D200 for the SRX Series. They describe new and changed features, known behavior, and known and resolved problems in the hardware and software.

You can also find these release notes on the Juniper Networks Junos OS Documentation webpage, located at


Junos OS Release 15.1X49-D200 supports the following devices: SRX300, SRX320, SRX340, SRX345, and High Memory (SRX550M), SRX1500, SRX4100, SRX4200, SRX5400, SRX5600, and SRX5800 devices with host subsystems composed of either an SRX5K-RE-1800X4 (RE2) with an SRX5K-SCBE (SCB2), or an SRX5K-RE-1800X4 (RE2) with an SRX5K-SCB3 (SCB3), and vSRX.

For more details about SRX5400, SRX5600, and SRX5800 devices hardware and software compatibility, please see If you have any questions concerning this notification, please contact the Juniper Networks Technical Assistance Center (JTAC).