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Open Issues

Learn about open issues in this release for EX 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 EX2300, EX3400,:EX4300-48MP and EX4300 , Pause frames counters does not get incremented when pause frames are sent.PR1580560

  • EX4400-48F :: RLI-53126: Carrier tranistions is not setting properly for channelized ports on non-DUT Lagavulin for QSFP28-100G-AOC-30M 740-064980 of FINISARPR1723924

  • When the remote end server/system reboots, QFX5100 platform ports with SFP-T 1G inserted may go into a hung state and remain in that state even after the reboot is complete. This may affect traffic after the remote end system comes online and resumes traffic transmission.PR1742565

  • The interface of ge-x/0/1 port might go down after virtual-chassis split and merge on EX4300-VCPR1745855

  • On all Junos and Junos evolved platforms with telemetry enabled, if the streaming server and export profile for reporting-rate are not properly configured in the analytics settings, rebooting the FPC would prevent any of the interfaces from coming up.PR1779722

  • After rebooting a mixed Virtual Chassis (VC) of EX4300-xxP and EX4300-MP switches or rebooting a EX4300-xxP member, interfaces with Power over Ethernet (PoE) configured will not come up on EX4300-xxP members.PR1782445

  • Ex-Hardening:Local/Remote fault insertion from TG is failingPR1789999

  • If standalone device has vccpd running with configurations as per virtual chassis, then it is considered a virtual chassis and not a standalone device. All messages seen will be as per virtual chassis as well.PR1805266

  • Autoneg error log observed in case of jack-out followed by jack in(JiJO) of SOURCE PHOTONICS & ACCELINK vendor 10G SFP-T industrial grade transceiver PR1815035

  • Traffic loss will be seen on 1G-SFP-T if speed is configured to 100m. 1G SFP-T has the AN feature enabled but the PHY we have b/w SFP-T and switch ie., PHY82756 doesn't support AN and this mismatch is causing the traffic loss. This needs feature enhancement PR1817992

  • Time Domain Reflectometry (TDR) support for detecting cable breaks and shorts aborts intermittently on some random ports.PR1820086

  • On all Junos and Junos Evolved platforms, 72-byte size memory leak is seen when interface configuration is added. But there is no traffic impact due to this issue.PR1842546

  • When a poe bounce command is issued in quick succession for multiple ports, the 'poe enabled' logs may not be printed for some of the poe ports. This is a cosmetic issue and functionality works as expected.PR1845161

  • A memory corruption issue can result random dcpfe (dense concentrator packet forwarding engine) process crashes on specific Junos QFX and EX platforms configured with VXLAN (Virtual Extensible Local Area Network) configuration.PR1856424

  • After multiple iterations of dc-pfe process restart, we may see interface with 10g-base-t transceiver (part# 740-123734) will not come up. PR1864715

  • dhcp-snoop routes are not installed when IPSG group is full when IPv4/v6 source guard is enabled along with DAI/NDI. When dhcp snooping binding entries exceed 512, even new bindings show up in the binding table, the dhcp-snoop route is not installed in HW. New bindings will be dropped due to DAI/NDI. This behavior is expected. As we are running out of space of FP entries in HW, routes are NOT installed beyond the scale. IPv4 and IPv6 uses the same VFP in HW. switch> request pfe execute command "show filter hw groups" target fpc0 Unit:0 Group Information: > VFP groups: Dynamic group id: 1. Pipe: 0 Entries: 1 Total_available: 512 Pri: 0 Def Entries: 0 VFP group for COS id: 143. Pipe: 0 Entries: 7 Total_available: 512 Pri: 2 Def Entries: 0 VFP group for DYN IPSG group id: 391. Pipe: 0 Entries: 512 Total_available: 512 Pri: 3 Def Entries: 0 full group with 512 entries PR1878355

  • EX4000: "ERROR: Unknown uboot version in pkg, not saved in EFI partition during Junos OS 24.4R2.25 upgrade" will be reported if any prior firmware image is not added in the device.PR1910075

  • Telemetry streaming pertaining to poe functionality performed under stressed system conditions involving specific daemon start/restart scenarios may sometimes lead to chassis daemon crash.PR1909197

High Availability (HA) and Resiliency

  • Graceful Routing Engine Switchover (GRES) not supporting the configuration of a private route, such as fxp0 , when imported into a non-default instance or logical system. Please see KB https://kb.juniper.net/InfoCenter/index?page=content&id=KB26616 resolution rib policy is required to apply as a work-aroundPR1754351

Platform and Infrastructure

  • It is noticed that EX4300 switches after an upgrade of Junos from 21.2R3-SX to 21.4R3-SX may exhibit a higher Cpu. Issue is resulting from fast path thread profiling code. It takes on an average 1 ms more for one fast path thread cycle, cumulatively overall fast path thread usage had increased. Thread profiling code has been optimised and the issue is fixed in the future JUNOS.PR1794342

  • On EX4300 switches, Address Resolution Protocol (ARP) requests used for Media Access Control (MAC) learning are not handled correctly when MAC limiting features, such as the 'mac-move-limit' knob, are configured. These features change MAC learning from hardware-based to software-based.PR1873052