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
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Runt, fragment and jabber counters are not incrementing on EX4300-MPs. PR1492605
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When TISSU is upgraded from Junos OS 22.4 release and later, the box come up as backup Routing Engine. PR1703229
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Carrier tranistions is not setting properly for channelized ports on non-DUT Lagavulin for QSFP28-100G-AOC-30M 740-064980 of FINISAR. PR1723924
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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
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The interface of ge-x/0/1 port might go down after virtual-chassis split and merge on EX4300-VC. PR1745855
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EX4300MP: VC member status toggling between "Inactive" and "NotPrsnt" state after member downgradePR1751871
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"Error:tvp_optics_eeprom_read: Failed to read eeprom for link" logs might be seen for some time during system reboot or pfe restart in EX3400. There is no functional impact due to these logs.PR1757034
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During device reboot, mge connected ports on the peer goes up after 90s into reboot. PR1767347
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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
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Local/Remote fault insertion from TG is failing. PR1789999
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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
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Third party (BRCM) vendor api bcm_plp_mode_config_get returning error code of phy unavailability for pic 0 mgig phy during phy init. No Functional impact. PR1812228
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Autoneg error log observed in case of jack-out followed by jack in(JiJO) of SOURCE PHOTONICS and ACCELINK vendor 10G SFP-T industrial grade transceiver. PR1815035
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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 between SFP-T and switch that is, PHY82756 does not support AN and this mismatch is causing the traffic loss. This needs feature enhancement. PR1817992
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Time Domain Reflectometry (TDR) support for detecting cable breaks and shorts aborts intermittently on some random ports.PR1820086
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On Junos OS QFX Series and EX Series platforms in an EVPN-VXLAN Centrally-Routed Bridging (CRB) scenario where the ingress leaf switch is configured with ESI (Ethernet Segment Identifier) lags (that is, the server is multihomed), if there is an overlap between ESI lag(s) trunk ID with physical port number(s) and overlap of destination MAC (DMAC) between virtual gateway address (VGA) MAC address 00:00:5e:00:01:01 (CRB setup with VGA / GW is on spine) with Virtual Router Redundancy Protocol (VRRP) MAC (specifically for the VRRP group 1 MAC address 00:00:5e:00:01:01) on the physical ports of the Leaf switches, then traffic loss will be observed for the inter-VLAN traffic.PR1820830
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On a working VC system, if a dc-pfe process restarts for any reasons, then there is a possibility of some interfaces not getting created after the dc-pfe restart.PR1823688
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On an EX4400 device with 4x25G uplink module configured in 1GE or 25G speed, peer side of an interface with 10GBASE-T transceiver may remain up even when the IFD(xe-x/2/y) is not created. For this to happen, a speed mismatched configuration is needed, where a 1G speed or a 25G speed is configured on the PIC 2.PR1831409
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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
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In A EX4400 virtual-chassis configuration, when a VC member that has 1 AC and 1 DC PSU is rebooted and re-joined the VC, the 'PEM mismatch alarm' is not seen on master for the member.PR1845365
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On all Junos platforms when speed is changed on an interface which is part of aggregated Ethernet bundle, interface will be removed and added with the updated speed. When some other operation such as interface disable is configured along with speed change on the interface in the same commit, then the interface is not removed and added to the bundle, it can cause other AE interfaces flap and traffic drop.PR1845370
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Baseline configuration commit will take more time when the device has 256000 MAC configurations configured under groups.PR1845657
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FXPC core file is seen intermittently during device reboot operation. No functional impact is seen on generating FXPC core file. PR1855408
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PCT : Commit error seen while configuring system syslog host with routing instance. PR1850071
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On Junos OS platforms, the standby router goes into the error state when switchover is performed. This will not impact the traffic. PR1847307
High Availability (HA) and Resiliency
Layer 2 Ethernet Services
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Management interface does not get IP even if the interface is bound .This issue is seen when a powercycle is triggered and service can easily be restored by restarting dhcp-service. CLI Command to restart dhcp service is
restart dhcp-service
. PR1854827
Platform and Infrastructure
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Upgrading EX4300 switches from Junos OS 21.2R3-SX to 21.4R3-SX might 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. PR1794342
Routing Protocol
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CLI /RPC
show bgp group rib-sharding all
orget-bgp-group-information
failure with XML CRITICAL ERROR and ODL validation failure. PR1826803