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Known Limitations

Learn about known limitations in Junos OS Release 21.4R2 for vSRX Virtual Firewall.

For the most complete and latest information about known Junos OS defects, use the Juniper Networks online Junos Problem Report Search application.

Platform and Infrastructure

  • From Junos OS release 21.4R2 onwards, the supported AWS instance types are C5 and C6. Instance type C4 support with vSRX is deprecated. If you wish to upgrade the Junos OS on a C4 vSRX instance, then you must deploy a new vSRX instance using the supported instance types. See Launch a vSRX Instance on an Amazon Virtual Private Cloud.

  • There is max limit on number of vlans that can be configured per VF for i40e driver. The number is 8. The maximum VLAN supported per VF is 63 VLANs in SR-IOV trust mode. PR1610282

  • When multiple vlan-tagging sub-interfaces are configured and switching vSRX3.0 between vlan-tagging and flexible-vlan-tagging support mode, traffic will stop and must reboot vSRX3.0 to recover, if trust mode is disabled for the virtual functions. PR1610287