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Known Limitations

Learn about known limitations in this release for EX Series switches.

Note: The EX2300 and EX3400 models are documented but not supported in this release.

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 EX4400-48F, whenever JOJI of optics is performed, the below messages are expected BCM Error: API bcm_plp_seahawks_module_read(phy_info, addr, offset, size, data) at tvp_bcm_seahawks_eeprom_read:952 -> -8PR1742075

  • Ex-Hardening:Local/Remote fault insertion from TG is failing. PR1789999

  • The issue is specific to the arm based platforms(EX4100, EX4000). This log is triggered under certain scenarios of DHCP failure events such as AS_PKT_DAI_FAILED, AS_PKT_DHCP_DROPPED, etc. As a workaround, we enabled one more log with the proper values under system events. For now, user can consider the log with proper values. PR1890822

  • On MX AFT based platforms, packets injected over IRB may get dropped in the PFE with an 'MTU exceeded' exception if the underlying Layer 2 interface is in trunk mode. PR1901133

Infrastructure

  • 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