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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 switches, NSSU from older Junos OS Release with Broadcom SDK 6.3.x to new Junos release with Broadcom SDK 6.5.x might not work. As a workaround normal upgrade from older release to new release can be done. PR1496765

  • Once VLAN is configured on an IFD, its always treated as vlxan port even though Layer 2 VLAN exists.PR1570689

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

  • On QFX5000 devices, we should configure only one static arp with multicast-mac entry per IRB interface. If we configure more than one static arp with multicast Mac entry per IRB interface, then the packets with different destination IP having static multicast mac will always go out with any one of the multicast mac configured in the system. PR1621901

  • Unified ISSU on QFX5120-48Y and EX4650 switches will 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 is 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 Releases 21.2 and later, validation and upgrade might fail. The upgrading requires using of the no-validate configuration statement. PR1568757