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Junos OS runs on the following Juniper Networks® hardware: ACX Series, EX Series, M Series, MX Series, PTX Series, QFabric, QFX Series, SRX Series, and T Series.

These release notes accompany Junos OS Release 15.1X49 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

Note: Junos OS Release 15.1X49 now supports vSRX and 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). Use the Junos OS Release 15.1X49 Release Notes and all the documentation for vSRX and for SRX5000 line devices with these specific host subsystem configurations (RE2 with SCB2 or RE2 with SCB3).

Junos OS Release 15.1X49 does not support SRX5400, SRX5600, or SRX5800 devices with the following cards:

  • SRX5K-40GE-SFP I/O Card (IOC)
  • SRX5K-FPC-IOC Flex I/O card (Flex IOC)
  • SRX5K-RE-13-20 Routing Engine (RE1)
  • SRX5K-SCB Switch Control Board (SCB)
  • SRX5K-SPC-2-10-40 Services Processing Card (SPC)

Junos OS Release 15.1X49 does not support branch SRX Series devices or SRX1400, SRX3400, or SRX3600 devices.

If you have any questions concerning this notification, please contact the Juniper Networks Technical Assistance Center (JTAC).

Modified: 2016-12-21