Junos OS runs on the following Juniper Networks® hardware: ACX Series, EX Series, M Series, MX Series, NFX Series, PTX Series, QFabric systems, QFX Series, SRX Series, T Series, and Junos Fusion.
These release notes accompany Junos OS Release 18.4R1 for the ACX Series, EX Series, MX Series, NFX Series, PTX Series, QFX Series, SRX Series, and Junos Fusion. They describe new and changed features, limitations, and known and resolved problems in the hardware and software.
The recommended release for Junos Fusion Data Center is 18.1R2-S2. The subsequent 18.xRx mainline releases (18.2, 18.3, and 18.4) do not support Junos Fusion Data Center.