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Known Limitations
Learn about known limitations in Junos OS Release 21.3R2 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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Use the no-validate option request system software add no-validate command when upgrading software from Junos OS release 21.1 or earlier to Junos OS release 21.2R1 or later. PR1568757
VPNs
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On SRX5400, SRX5600, and SRX5800 devices, during in-service software upgrade (ISSU), the IPsec tunnels flap, causing a disruption of traffic. The IPsec tunnels recover automatically after the ISSU process is completed. PR1416334
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In some scenarios, the SRX5000 line of devices might show obsolete IPsec SA and NHTB entry even when the peer tear down the tunnel. PR1432925