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The Juniper Networks NorthStar Controller is an SDN controller that enables granular visibility and control of IP/MPLS flows in large service provider and enterprise networks. Network operators can use the NorthStar Controller to optimize their network infrastructure through proactive monitoring, planning, and explicit routing of large traffic loads dynamically based on user-defined constraints.

The NorthStar Controller 5.0.0 release is fully supported (all features) with Junos OS Release 19.2R1 and later. Table 1 lists feature-specific Junos OS requirements.

Table 1: Feature-Specific Junos OS Requirements

NorthStar Feature

Compatible Junos OS Releases


15.1F6 and later

Segment Routing (SPRING), MD5 authentication for PCEP, P2MP, Admin groups

17.2R1 and later

PCEP-Provisioned P2MP Groups

18.3R2 and later


18.4R2 and later

Bandwidth sizing and container LSPs for SR-TE LSPs

19.2R1 and later


The Path Computation Element Protocol (PCEP) configuration on the PCC routers does not persist across upgrades when the SDN package is not part of the installation binary. Before upgrading the Junos OS image to this release, save the existing configuration to a file by using the save command. After you upgrade the Junos OS image on each PCC router, use the load override command to restore the PCEP configuration.

The NorthStar Controller is supported on the following Juniper platforms: M Series, T Series, MX Series, PTX Series, and QFX10008. As of Junos OS Release 17.4R1, NorthStar Controller is also supported on QFX5110, QFX5100, and QFX5200. Please contact JTAC for more information.

Junos OS supports Internet draft draft-crabbe-pce-pce-initiated-lsp-03 for the stateful PCE-initiated LSP implementation (M Series, MX Series, PTX Series, T Series, and QFX Series).