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Known Limitations

Learn about known limitations in Junos OS Evolved Release 21.2R2 for PTX Series Routers.

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

General Routing

  • The PTP FPGA is kept in reset during BIOS boot. During Linux boot, the PTP FPGA is taken out of the reset and pcie-tree is reenumerated. Hence you might see the link up or down during this sequence. PR1572061

  • If you offline multiple SIBs and halt the primary Routing Engine, the SIBs might be stuck in the offline state for 15 minutes, before it goes to the offline state. PR1584712

  • If a 400G ZR link is configured with 4x100GE channelized mode on one end and 1x400GE on the other end, it results in link status mismatch. The 1x400GE port reports up incorrectly when it is in fact down and the 4x100GE port reports down. PR1597707

  • With bidirectional 400 Gbps line rate traffic, the SIB offline/online reports sm_sch_dat_intr_oresource_drop (0x4300c9) interrupt. The alarm might not to be seen if the interrupt is recategorized to Minor for BT-based systems. PR1603241

  • Ungraceful FRU removal results in CRC errors on the peer FRUs, which might potentially wedge the Packet Forwarding Engines. PR1615297

Juniper Extension Toolkit (JET)

  • GRPC on WAN port is not working. The libsi can only be linked with 64-bit binaries. To access data or WAN ports, you need to link libsi with the binary. By default, the shell on the device includes libsi, but it is not available to the CLI commands as the CLI will make mgd invoke cscript to run a Python script through CLI. PR1603437


  • If all the Routing Engines are not rebooted after a network service configuration change, the rpd process might crash. PR1461468

  • There are several configuration changes added to address the scaling requirements to avoid prematurely timing out protocol session, adjacency, and routing forwarding plane convergence. PR1575188

Network Management and Monitoring

  • The juise core files are generated while using request-system-storage-cleanup RPC with post method in HTTP. The root cause is due to a long list of file details sent by this RPC. PR1587337

  • The set system no-hidden-commands configuration blocks the NETCONF sessions. As a workaround, you can disable the no-hidden-commands. PR1590350

Routing Protocols

  • With IS-IS or BFD and RSVP on a link with link protection enabled, on PPMD restart, multiple BFD sessions might flap. PR1585644