Known Limitations
Learn about known limitations in this release for the PTX Series.
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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Whenever the underlay interface flaps for 1K legacy GR-tunnels, BGP establishment over these tunnels may take ~8 to 10 minutes.PR1614179
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 upgrading requires using of 'no-validate' configuration statement. https://kb.juniper.net/TSB18251. PR1568757
Routing Protocols
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When "routing-options transport-class fallback none" is not configured - do not configure more than 10 transport-classes. Or advertise more than 10 distinct colors in SRTE or FlexAlgo. This limitation will be fixed by PR-1695020. PR1648490
User Interface and Configuration
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On all Junos and Junos Evolved platforms configured with persist-group-inheritance, which is enabled by default from 19.4R3 onwards, might lead to mustd process crash in highly scaled. configuration. PR1638847