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Open Issues

Learn about open issues in Junos OS Release 21.2R1 for QFX Series switches.

For the most complete and latest information about known Junos OS Evolved defects, use the Juniper Networks online Junos Problem Report Search application.

General Routing

  • On QFX5220-128C, an interface might stay down for around 3 seconds after the interface is enabled or fiber is inserted, there is traffic loss due to this issue. PR1480112

  • When the evo-pfemand process is restarted due to any error conditions, the channelized interfaces (if configured) will flap two times (once during the initialisation) and the second time after the configuration is programmed. PR1526984

  • On all QFX Junos OS Evolved platforms, if scaled OSPF (Open Shortest Path First) neighbors (e.g 512 neighbors) are formed over IRB (Integrated Routing and Bridging) interfaces with layer 2 interfaces in the interface-mode trunk, the OSPF routes might be not learned from the neighbors. The issue results in traffic loss. PR1570498

  • When optic is removed and FEB is not present, internal serdes are not powered off to reduce FPC power consumption in 21.4. PR1574330

  • On QFX5700s, DAC connection at peer end will not go down while RCB is rebooted. PR1574342

  • On QFX5700 platforms, system goes for reboot when faulty FEB is off-lined for recovery. PR1578090

  • In QFX5220-32CD, rarely a picd daemon core seen after bootup. This doesn't affect the functionality as the device recovers itself automatically by restarting picd daemon.PR1583164

  • On QFX5700 platforms few interfaces are not coming up after removing channelization through single commit that is by using delete interfaces. PR1592238

  • On QFX5700 platforms, auto-negotiation is not supported for 100G DAC interfaces. PR1594135

  • With QFX5220-32CD interconnected to PTX-10008 chassis line card, intermittently issue is seen where 100G SR4 optics link does not come up or flaps, and continuously increasing FEC errors are seen on PTX end. PR1597528


  • The alarm Host 0 Active Disk Usage Exceeded might be generated due to large files under /var/log/journal which were already marked as deleted in the lsof command. PR1601251

Routing Policy and Firewall Filters

  • On QFX5700 when we issue clear firewall all command, policer statistics are not cleared. User defined policer statistics are removed. PR1581867