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Known Limitations

Learn about known limitations in this release for ACX Series routers.

For the most complete and latest information about known Junos OS defects, use the Juniper Networks online Junos Problem Report Search application.

General Routing

  • 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/TSB18251 PR1568757

  • servo didn't loose lock for 2000 ns asymmetry value now. But i see Servo lost lock if i apply 10000 ns of asymmetry value. This is expected behaviour from the microsemi as If phase offset is >= 1.5us, servo will come out of Phase Lock. So, when you added 3000/4000ns asymmetry, algorhtm would calculate phase offset 1.5us/2us. As a result, servo will lose Phase Lock. PR1764594

  • When asymmetry provided has more than 2000 nsec, there is extra overshot which is expected as per Microsemi stack version v4.10.0P3. this is immediately corrected again after few seconds as expected. PR1770123