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Known Limitations

Learn about known limitations in this release for QFX 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

  • On QFX5100 devices, NSSU from older Junos OS release with Broadcom SDK 6.3.x to new Junos OS release with Broadcom SDK 6.5.x might not work. As a workaround, perform a normal upgrade from older release to new release. PR1496765

  • On QFX5000 devices, in the EVPN-VXLAN deployment, the BUM traffic replication over VTEP might send out more packets than expected. PR1570689

  • On QFX5000 devices, IRACL filters will not be able to match on the VXLAN tunnel terminated packets. PR1594319

  • On QFX5000 devices, you must configure only one static ARP with multicast-MAC entry per IRB interface. If you configure more than one static ARP with multicast-MAC entry per IRB interface, then the packets with different destination IP having static multicast-MAC always go out with any one of the multicast-MAC configured in the system. PR1621901

  • Unified ISSU on QFX5120-48Y devices are not be supported if there is a change in the Cancun versions of the chipset SDKs between the releases. This is a product limitation as change in the Cancun firmware leads to the chip reset and hence ISSU gets impacted. The Cancun versions in the chipset SDKs should be the same between two JUNOS OS releases for ISSU to work. PR1634695

Infrastructure

  • When upgrading from Junos OS 21.2 release and earlier to a later release, validation and upgrade fails. Use the no-validate command to upgrade. PR1568757