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Known Limitations

Learn about known limitations in this release for EX Series switches.

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

EVPN

  • EVPN-VXLAN: After Routing Engine switchover, you will see a momentary traffic loss with EVPN VXLAN on the EX4400 switches. PR1659315

General Routing

  • On all Junos trinity-based platforms such as EX Series and MX Series, global port mirroring will not work for RSPAN scenario (port-mirror output as VLAN or bridge-domain). Port-mirror instance configuration set forwarding-options port-mirroring instance will work for RSPAN scenario. PR1668900

  • MVRP on P-VLAN promiscuous port is not supported. If MVRP is configured on promiscuous port, then hosts connected to secondary VLAN ports will not be able to reach external world through promiscuous port carrying primary VLAN tags. PR1693345

  • JUNOS_REG: EX4400 : input-vlan-tagged-frames are not in the expected range while verifying VLAN tagged Frames. PR1749391

Infrastructure

  • When upgrading from releases before Junos OS Release 21.2 to Release 21.2 and onward, validation and upgrade might fail. The upgrade requires using the 'no-validate' option to complete successfully. TSB18251PR1568757

Virtual Chassis

  • EX4400 supports multiple uplink modules. Some supports Virtual Chassis port (VCP) conversion and some doesn't. Therefore, the recommended procedure is to convert VCP to NW port first and then make sure uplink module is made offline using request chassis pic fpc command before removal. PR1665242