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Resolved Issues

This section lists the issues fixed in the Junos OS main release and the maintenance releases. The identifier following the description is the tracking number in the Juniper Networks Problem Report (PR) tracking system.

Resolved Issues: 15.1F2

Forwarding and Sampling

  • In PTX Series Carrier-Grade Service Engine (CSE) jflow solution environment, because the sampling process (sampled) may get into a continuous loop when handling asynchronous event (for example, aggregated tethered services interface flapping, or route update, or IFL/IFD update), the sampled process may never come out of that loop which may result in high CPU usage (up to 90% sometimes). Also, the flabel might be exhausted because sampled is not able to consume states (such as route updates, interface updates) generated by kernel, and finally the router would not make any updates. PR1092684

General Routing

  • Prior to this fix "show interface diagnostics optics" command shows output for all four lanes for 10G ports of 48x10GE 12x40GE QSFP+ PIC. Normal behavior would be to display output for only the lane that the port belongs to. PR959514
  • On PTX Series routers, the interrupt-driven basis link down detection (an interrupt-driven link-down notification is generated to trigger locally attached systems to declare the interface down within a few milliseconds of failure) may fail after performing unified in-service software upgrade (ISSU). The interrupt might be prevented after performing unified ISSU due to disabling the interrupt registers before unified ISSU, but never restored after. PR1059098
  • The configured buffer-size will not take effect until either "transmit-rate" or "excess-rate" is configured. PR1072179
  • On Junos OS Release 15.1R1, when the multicast next-hop is changed, the grafting and pruning operations take more time than before. PR1090608

Interfaces and Chassis

  • If we load jinstall/jinstall64 image on PTX Series and if we have CFM configured over AE interfaces, this issue will be seen. PR1085952


  • When fast-reroute, node-link-protection or link-protection is configured, if a Shared Risk Link Group (SRLG) is associated with a link used by an LSP ingressing at a router, then on deleting the SRLG configuration from the router, the SRLG entry still stays in the SRLG table even after the re-optimization of this LSP. PR1061988
  • In Junos OS Release 14.1 and later, the "load-balance-label-capability" configuration statement is introduced to enable the router to push and pop the load-balancing label, which causes LDP and RSVP to advertise the entropy label TLV to neighboring routers. MX Series, T4000, and PTX Series platform have the capability and it is reflected in their default forwarding-options configuration. However, there is a software defect in the way that Entropy Label Capability (ELC) TLV is encoded in the LDP label mapping message, which might cause the LDP session between the routers to go down. PR1065338

Related Documentation

Modified: 2017-07-06