Known Limitations
Learn about known limitations in this release for SRX Series devices.
For the most complete and latest information about known Junos OS defects, use the Juniper Networks online Junos Problem Report Search application.
Chassis Clustering
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In Z-mode configuration, sometimes the statistics of back-up session may not be correct on fail-over from master to back-up.PR1667098
Infrastructure
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When upgrading from releases before Junos OS Release 21.2 to Release 21.2 and onward, validation and upgrade might fail. The upgrading requires using of 'no-validate' configuration statement.PR1568757
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On SRX4600 platform, the CPU may overrun while performing sanity check due to incompatibility issues between ukern scheduler and Linux driver which might lead to traffic loss.PR1641517
VPNs
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In some scenario(e.g configuring firewall filter) sometimes srx5K might show obsolete IPsec SA and NHTB entry even when the peer tear down the tunnel. PR1432925