What's Changed in 25.2R1-S1

Learn about what changed in this release for SRX Series.

Chassis Clustering

MNHA Upgrade Requirement for IPv6-Based ICL Encryption (SRX4200, SRX4300, SRX4600, and SRX4700)—In Multinode High Availability (MNHA) deployments that use IPv6 addresses for Interchassis Link (ICL) (HA link) encryption, upgrading from an earlier Junos OS release to a release that supports IPv6-based ICL encryption requires following the isolated node upgrade procedure to ensure a successful transition. This is a one-time requirement when moving to the first supported release; subsequent upgrades do not require the isolated node upgrade procedure.

[See [SRX] Isolated Node Upgrade Procedure for Multinode High Availability and Software Upgrade in Multinode High Availability.]