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

These release notes accompany Junos OS Release 17.2R3 for the ACX Series, EX Series, Junos Fusion Enterprise, Junos Fusion Data Center, Junos Fusion Provider Edge, MX Series, NFX Series, PTX Series, and QFX Series. They describe new and changed features, limitations, and known and resolved problems in the hardware and software.