Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


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

  • Unified ISSU on EX4650 devices will not be supported if there is a change in the chipset SDKs between the releases. This is a product limitation leading to the chip reset and hence unified ISSU is impacted. PR1634695

  • On QFX10000 switches, wWhen EVPN-VXLAN tunnel gets established over IPv6 underlay, the encapsulated packets emitted out of leaf node might have UDP checksum zero. This is the default behavior of all IPv6 tunneled UDP packets and it is allowed as per RFC6936. PR1656363

  • On QFX10008 devices, statistics for multicast packets is not as expected as the packets has Layer 2 header stripped during replication in Packet Forwarding Engine because of which it is not forwarded to the next hop. PR1678723


  • When upgrading from Junos OS Release 21.2 and prior to Junos OS Release 21.2 and later, validation and upgrade might fail. The upgrading requires the use of the no-validate configuration statement. PR1568757