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Junos OS Release Notes for MX Series 3D Universal Edge Routers


These release notes accompany Junos OS Release 15.1F7 for the MX Series. They describe new and changed features, limitations, 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


This release introduces some behavior changes to the unified in-service software upgrade (ISSU) functionality for MX Series. We do not recommend using unified ISSU to upgrade from an earlier Junos OS release to Junos OS Release 15.1.


The Junos OS 15.1F7 release does not support the following MX Series routers or features:

  • Virtual MX Series router (vMX)

  • BBE support for the Broadband Network Gateway (BNG)