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Known Limitations
Learn about known limitations in this release 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.
Infrastructure
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When upgrading from releases before Junos OS Release 21.2 to Release 21.2 and later, validation and upgrade might fail. The upgrade requires using the
no-validate
option to complete successfully. https://kb.juniper.net/TSB18251. PR1568757
Platform and Infrastructure
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The QFX5000 platforms can support DF only at port level granularity (In other words, for all evpn instances hosted on an ESI, only one of the Multihomed QFX5000 nodes can be DF). Below config options are recommended Have df-granularity knob (with which QFX5000 platforms seem to have been qualified). Here, few bytes from esi value itself, instead of vlan-id are used for MOD-based DF. Another approach would be to use preference based DF election. PR1672383
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On QFX10008 devices, statistics for multicast packets is not as expected as the packets has L2 header stripped during replication in PFE because of which it is not forwarded to the next hop. PR1678723
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Dot1x daemon read the config whenever there is change in time based license for the feature MACsec.PR1713881
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The QFX10000 devices might use udp port 67 as the source port in the VXLAN udp header. PR1727072