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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

  • Error logs are expected when routes point to the target next hop, which in turn point to hold next hops. These error logs are present for a short time. Later, when the next hop changes from a hold next hop to valid next hop, unilist next hops will be walked again and updated with the appropriate weight and reroute counters, and no more error logs will be seen. PR1387559

  • Channelized interfaces leds are not properly represented in show chassis led.PR1720502

  • Problem: Performing VC split and merge operation causes traffic to be affected for Broadcast, Unknown-unicast and Multicast traffic. RCA: When the Link is Brought down, each FPC will try to re-synchronize the IFDs, in addition resources are busy with updating for the new role. This can cause some synchronization issues with for IFDs/IFLs and other such lists. Test: This can be seen by the VTY command show ifd brief and show ifl brief for all the FPCs Workaround: It is recommended to wait at least 240 seconds after Splitting the VC ad merging it back again. This ensures that the system can get enough time to synchronize the IFDs/IFLs etc. from the kernel.PR1867979

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. PR1568757