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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.

General Routing

  • Unified ISSU on EX4650 switches will not be supported if there is a change in the vendor versions of the chipset SDKs between the releases. This is a product limitation as change in the vendor firmware leads to the chip reset and hence ISSU is impacted. The vendor versions in the chipset SDKs should be the same between two JUNOS OS releases for unified ISSU to work. PR1634695

  • EX4100 48P/T SKUs: On changing interface speed change, the interface stats are retained on ports 24-to-47 but cleared on ports 0-23. PR1657995

  • On EX4100 and EX4100-F series SKU PIC0 ports (except EX4100-24MP first 8 ports [mge 0-7]), Jabber frames are dropped as oversized frames. PR1663992

  • EX4100 series and EX4100-F series: VC (PIC1) 4x1G ports in network-mode will need auto-neg off on the peer-device. PR1665640

  • MVRP on PVLAN promiscuous port is not supported. If you configure MVRP 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

Virtual Chassis

  • EX4400 supports multiple uplink modules. Some supports VC port conversion and some does not and hence, the recommended procedure is to convert VC port to NW port first and then make sure uplink module is made offline using request chassis pic <> fpc <> command before removal.PR1665242