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Known Behavior

There are no changes in known behavior in Junos OS Release 15.1F2 for the M Series, MX Series, and T Series.

Software Installation and Upgrade

  • In Junos OS 15.1F2-S15 release, when unified in-service software upgrade (ISSU) is done from any other Junos OS releases, the DPC cards undergo a cold boot rather than a warm boot. This is because of the changes that are done to the hardware table attributes for DPC and for these changes to be effective, the card must undergo a cold boot. It is observed that the loss of traffic using DPC cards are in the order of minutes than second during unified ISSU. PR1256555

Related Documentation

Modified: 2017-07-06