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What's Changed

Learn about what changed in this release for PTX Series routers.

Class of Service (CoS)

  • For PTX Series devices running Junos OS Evolved, software priority "medium-low" maps to hardware priority "medium" for normal scheduling mode and "low" for strict priority scheduling mode.

Juniper Extension Toolkit (JET)

  • Python 3 is the default and only Python version for executing Juniper Extension Toolkit Python scripts (ACX Series, PTX Series, and QFX Series)—Junos OS Evolved supports only Python 3 for executing Juniper Extension Toolkit (JET) scripts written in Python. Python 2.7 is no longer supported for executing JET scripts, and we've deprecated the language python statement at the [edit system scripts] hierarchy level.

    [See Understanding Python Automation Scripts for Junos Devices.]

Junos OS API and Scripting

  • Deprecated functions in the libpyvrf Python module (ACX Series, PTX Series, and QFX Series)—The libpyvrfPython module no longer supports the get_task_vrf() and set_task_vrf() functions.

    [See How to Specify the Routing Instance in Python 3 Applications on Devices Running Junos OS Evolved.]

  • Python 3 is the default and only Python version for executing commit, event, op, and SNMP Python scripts (ACX Series, PTX Series, and QFX Series)—Junos OS Evolved supports only Python 3 for executing commit, event, op, and SNMP scripts written in Python. Python 2.7 is no longer supported for executing these types of scripts, and we've deprecated the language python statement at the [edit system scripts] hierarchy level.

    [See Understanding Python Automation Scripts for Junos Devices.]

Network Management and Monitoring

  • Python 3 is the default and only Python version for executing YANG action and translation Python scripts (ACX Series, PTX Series, and QFX Series)—Junos OS Evolved supports only Python 3 for executing YANG action and translation scripts written in Python. Python 2.7 is no longer supported for executing YANG action and translation scripts, and we've deprecated the language python statement at the [edit system scripts] hierarchy level.

    [See Understanding Python Automation Scripts for Junos Devices.]

User Interface and Configuration

  • Support for temperature sensor (PTX10001-36MR)—We support the temperature sensor statement at the edit chassis cb hierarchy level. You can use the temperature sensor statement to increase the fan speed and customize the temperature threshold. We recommend certain values for ZR and ZR-M modules to work which helps the temperature to remain within the thresholds.

    [See temperature-sensor.]