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Known Limitations
Learn about known limitations 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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In EX2300, transit ARP requests entering a port can get trapped to the CPU even if no IRB is configured on the VLAN. This can result in unnecessary ARP requests to the CPU and in extreme cases result in drops of genuine ARP requests in the ARP queue to CPU. PR1365642
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This is a Broadcom limitation and Day 1 issue affecting broadcom chipsets such as EX4650's, EX4300. One VLAN can be mapped to only on ERPS ring. For example, VLAN 100 can be mapped to only one ERPS ring. This same VLAN 100 cannot be part of another ERPS ring on the same switch.PR1732885
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[interface] [all] EX4400-48F :: JUNOS_REG: EX4400 : input-vlan-tagged-frames are not in the expected range while verifying Vlan Tagged FramesPR1749391
Infrastructure
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When upgrading from releases before Junos OS Release 21.2 to Release 21.2 and onward, validation and upgrade might fail. The upgrade requires using the 'no-validate' option to complete successfully. https://kb.juniper.net/TSB18251PR1568757