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Open Issues

Learn about open issues in Junos OS Release 22.2R1 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.


  • On Junos OS platforms such as MX Series, QFX5000, and QFX10000 platforms and Junos OS Evolved platforms such as ACX Series and MX Series, on interface up and down event loop prevention might not work resulting in BUM traffic might drop. PR1669811

General Routing

  • When VLAN is added as an action for changing the VLAN in both ingress and egress filters, the filter is not installed. PR1362609

  • VXLAN VNI (multicast learning) scaling on QFX5110 traffic issue is seen from VXLAN tunnel to Layer 2 interface. PR1462548

  • 5M DAC connected between QFX10002-60C and MX2010 doesn't link up. Interoperability issues occur between QFX10002-60C and MX2010. PR1555955

  • To avoid the additional interface flap, configure interface hold time. PR1562857

  • On a QFX5120, when you disable a protected link, you might see a delay in the system response. It might take 200 to 400 milli seconds for the system to react to disable link event. PR1579931

  • In a fully loaded device, at times, firewall programming fails due to scaled prefix configuration with more than 64,800 entries. PR1581767

  • Pim VxLAN is not working on TD3 chipsets enabling VxLAN flexflow after Junos OS Release 21.3R1. PR1597276

  • On QFX5100, you can see the optical power after detaching and attaching QSFP on disabled interface. PR1606003

  • In QFX10002-60C under mac statistics output-mac-control-frames and output-mac-pause-frames does not increment. PR1610745

  • On QFX5120-48Y, the traffic or the protocols on pure Layer 3 interfaces might behave unexpectedly. This occurs when you load scaled and baseline configurations multiple times one after the other without a pause in between. PR1612973

  • On Junos OS QFX10000 platforms with scaled number of Bidirectional Forwarding Detection (BFD) sessions configured, addition of a new BFD session might cause flapping in newly added session and other existing BFD sessions.PR1621976

  • Backup FPC lose their connection to the master when new members are added to the Virtual Chassis fabric (VCF).PR1634533

  • We don't support the bound delay configuration feature for the logical interface. You will see the core file only when you enable bound delay configuration on the device. PR1634941

  • On Junos platforms, high BGP scale with flapping route and BGP monitoring protocol (BMP) collector/station is slow. Because of the memory pressure the rpd process crashes. PR1635143

  • On QFX10002-60c, in EVPN/VxLAN scenario multicast traffic received on the INET interface (L3 interface) might be dropped.PR1636842

  • When a 100G interface on a QFX5120 converts to a Virtual Chassis port, the interface stays down as the port is configured as 40G internally. PR1638156

  • On the QFX5100 Virtual Chassis platform, although you configure local-minimum-links statement on the device, the aggregated Ethernet interface do not go down on a single interface flap in the bundle. PR1649637

  • You might observe a traffic loss with virtual-router function on QFX5000 line of switches. PR1650335

  • On QFX Series platforms, for a filter change operation, transit packets might drop on the Packet Forwarding Engine. ICMP, BFD and all routing protocols might go down when the timing issue occurs. PR1651546

  • BFD session session-state is showing DOWN when operating in centralized mode. Packet loss might be seen. PR1658317

  • After converting access side port from SP style to EP style, MAC-IP learning fails for a host and ARP do not get resolved. PR1658657

  • On all Junos OS platforms, when a secondary Precision Time Protocol (PTP) member that used one IPv6 address reboots with another IP address via Dynamic Host Configuration Protocol (DHCP). That might end up in multiple entries for the same source port.PR1659453

  • On QFX10000 Junos OS platforms, the configuration of the IGMP group range might result in a specific multicast route get programmed and this might cause traffic loss. PR1659732

  • EX4600 and QFX5100-24Q devices Virtual-chassis will be in unstable state for 3-7 minutes causing traffic loss. PR1661349

  • After upgrading on QFX5110, the IPv6 ND packets drop. As a result, you might not see functional impact on IPv4. PR1662707 PR1662707

  • On QFX5000 Series platforms, when unicast Address Resolution Protocol (ARP) is received for a MAC address that is already learned in an EVPN-VxLAN environment, the ARP request is flooded and duplicate packets might be seen on leaf devices. You might see some service impact where split-horizon might not work or continuous mac-move might be seen. This issue rarely in a production environment due to presence of intermediate switches which might resolve the unicast ARP query.PR1665306

  • After rebooting, you'll see that the link does not have a static MAC address and results in unicast traffic flooding. You might observe a traffic drop for this static MAC. PR1666399

  • NSSU fails with below combinations on QFX5120-48T.

    1. From Junos OS Release 22.1R1.10 to 22.2R1.6

    2. From Junos OS Release 21.4R1.12 to 22.2R1.6

    3. From Junos OS Release 21.3R2.11 to 22.2R1.6.


  • On QFX5110 platforms, the native VLAN feature might not be working as expected, as the interface even if configured with native VLAN, the traffic egresses out with tagged VLAN instead of untagged traffic.PR1669857

  • Native vlan with vlan rewrite on same interface not supported..PR1671372

  • In case of EVPN VXLAN IPv6 Underlay, ECN bits from the IP TOS of CE packet is not getting copied to the Tunnel header(Access to Network case). PR1672308

  • On QFX5K Junos devices, bulk configs add/delete for CE facing ports may cause PFE core.PR1672537


  • On QFX Series line of switches, IPv6 traffic output byte of ipv6-transit-statistics is not in range as per traffic generator statitics. PR1653671

Layer 2 Ethernet Services

  • The DHCP client configuration is coming from AIU script and vsdk sandbox. The DHCP client configuration coming from AIU script has the serial Id in vendor id where as the default configuration from sandbox doesn't have. There is no impact on functionality or service. PR1601504

Layer 2 Features

  • In case of access-side interfaces used as SP-style interfaces, when a new logical interface is added and if there is already a logical interface on the physical interface, there is a traffic drop on the existing logical interface. PR1367488

  • On QFX5100 platforms, a change in TPID in the Device Control daemon might result in traffic drop in Packet Forwarding Engine because of the failure in Layer 2 learning or interfaces flapping. PR1477156

Platform and Infrastructure

  • If you use the source address NTP configuration parameter and issue the command set ntp date from the CLI, packets will be sent with the source address of the outgoing interface rather than the manually configured IP address. Typically the manually configured IP address would be a loopback address. The problem does not apply to automatically generated NTP poll packets. PR1545022

Routing Protocols

  • On all Junos OS platforms and all Junos OS Evolved platforms, Routing Process Daemon (rpd) crashes and restarts when Border Gateway Protocol (BGP) is configured and a specific timing condition is hit for secondary route. This issue might cause a traffic impact. PR1659441