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Known Limitations

Learn about known limitations in Junos OS Release 21.2R3 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.

Platform and Infrastructure

  • Junos OS might hang trying to acquire the SMP IPI lock while rebooting when it is running as a VM on Linux and QEMU hypervisor. PR1385970

  • On the QFX10000 line of devices, if an analyzer is configured to mirror traffic of an input aggregated Ethernet interface and a new member is added to the same aggregated Ethernet interface, then the analyzer might not provide sample packets that flow through a newly added child interface. PR1417694

  • This issue occurs due to PECHIP limitation when underlay is tagged. After de-encapsulation when inner packet is recirculated it still retains the VLAN tag property from the outer header since outer header was tagged. Thus 4 bytes of inner tag got overwritten in inner packet and packet got corrupted which will result in EGP chksum trap seen in PECHIP. Fixing PECHIP limitation in software has high risk. It will be accommodated in a future release. As a workaround, enable encapsulate-inner-vlan statement. PR1435864

  • On QFX10002 switches in a dynamic IP-IP tunnel transit scenario, when sFlow egress sampling is enabled on an aggregated Ethernet interface in an ECMP case, the sFlow export data does not include the nextHop field. PR1533307

  • On QFX5100 devices not running the qfx-5e codes (non-TVP architecture), when an image with the Broadcom SDK upgrade (6.5.x) is installed, the CPU utilization might go up by around 5%. PR1534234

  • On QFX5200 and QFX5100 switches with the IPIP tunnel feature, show dynamic-tunnels database statistics command output shows extra packet counts (that is, sampled packets when sFlow is enabled). PR1555922

  • The rpd crash is observed when the device reboot and/or daemon restart. The Junos-Evolved based PTX products are impacted while Junos-Evolved based QFX and EX products are not impacted by this issue. PR1567043

  • On QFX10002-72Q devices, configuration validation is not supported during an image downgrade or upgrade. PR1579050

  • With multicast sampling enabled, some packets might be dropped when samples received from HW match the multicast replication rate configured. PR1586690

  • On QFX5000/EX46xx, IRACL filters will not be able to match on VxLAN tunnel terminated packets. PR1594319

Infrastructure

  • When upgrading from pre Junos Release 21.2 to Release 21.2 and onward, validation and upgrade will fail. The upgrading requires using of no-validate statement. PR1568757

Routing Protocols

  • On QFX5120-48YM platform, when scale of IPv4 and IPv6 routes are present in LPM profile, few of the IPv6 routes will not be installed when the ports on which routes are learnt is flapped due to LPM table full error. PR1557655