Software Installation and Upgrade
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Base operating system upgrade (ACX Series, PTX Series, and QFX Series)—Starting in Junos OS Evolved Release 22.1R1, Junos OS Evolved uses the Wind River Linux LTS 19 base operating system. This upgrade provides improved security and better performance. Prior to this release, Junos OS Evolved used the Wind River Linux 9 base operating system.
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OpenSSL version upgrade (ACX Series, PTX Series, and QFX Series)—Starting in Junos OS Evolved 22.1R1, we’ve upgraded the OpenSSL version 1.1.1 to OpenSSL version 3.0.0 with Transport Layer Security (TLS) version 1.3 protocols. The upgraded OpenSSL version 3.0.0 with TLS protocol version 1.3 provides improved security and better performance.