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.
Infrastructure
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When upgrading from before Junos OS Release 21.2 to Junos OS Release 21.2 and after, validation and upgrade will fail. The upgrading requires using of no-validate configuration. PR1568757
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On SRX4600 device, 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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On SRX5000 line of devices, in some scenario, the device output might display obsolete IPsec SA and NHTB entry even when the peer tear down the tunnel. PR1432925