What’s Changed in Release 21.3R1

Changes to how command-line arguments are passed to Python action scripts (ACX Series, EX Series, MX Series, PTX Series, QFX Series, SRX Series, vMX, and vSRX)—When a custom YANG RPC invokes a Python action script and passes command-line arguments to the script, the device prefixes a hyphen (-) to single-character argument names, and it prefixes two hyphens (—) to multi-character argument names. The prefix enables you to use standard command-line parsing libraries to handle the arguments. In earlier releases, the device passes the unmodified argument names to the script.

[See Creating Action Scripts for YANG RPCs on Devices Running Junos OS.]

vCPU core based license and license key format (vSRX 3.0) —When you are upgrading from Junos OS release 20.4R1 or earlier releases to Junos OS release 21.1R1 or later releases, you need new license keys to use the features on the listed devices. Contact Customer Care to exchange license keys. For more information, see vSRX 3.0 requires a vCPU core based license from Junos OS release 21.1R1 onwards.