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Known Limitations

Learn about known limitations in Junos OS Evolved Release 21.3R1 for ACX 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

  • When inserting 40G optics which has the existing link, the LED of this 40G port shows green first, then the port LED shows amber and green. This is because TX_ENABLE is set by default for this optics. When the optics is out of reset after being inserted, the laser is turned on, so the port is up. Then after two seconds, the laser is turned off for serdes init, and the laser is turned on after serdes init is complete. The optics module firmware cannot be changed, and the design has no issue. This must be a product limit. PR1565723

  • The protocol is obselete and same functionality can be achieved by using static IGMP. PR1589956

  • When PTP is enabled, Storm port 31 will be configured to 1G. Vendor J2 only supports to 10G, so vendor gearbox converts 10G to 1G by rate matching, but there is one limitation: it can only support frame size to 2000 bytes officially, so jumbo frame cannot be supported on port 31 when PTP mode is enabled. PR1593015

  • In Layer 3 VPN, Layer 3 rewrite does not work for the core file to access packets if vrf-table-lable is not used in the routing-instance. PR1594401

  • ACX7100 does not support multicast route statistics. PR1595046

  • In Junos OS Evolved, we support only default ieee-802.1 classification on family ccc physical interfaces. This classifier is not displayed in CLI. PR1596342

  • Observing traffic drop on scaling RSVP ingress LSP beyond 32000 on the system. Traffic loss observed because LSP installation in Packet Forwarding Engine takes a longer time. When we are trying to scale more than 32000 LSP scale. PR1603195

  • This is the common issue of Junos OS Evolved platform for 400G DAC. On picd restart, the first pcsE has no Xcvr info, and the default Xcvr type is optics, so pfemand will configure the port as 400G optics and turn off AN, later on. When the second pcsE arrives, it will carry the correct Xcvr info, and turn on AN again. This will cause an one-link flap. In early stage of picd restart, the underlying link is still up, this will be updated to picd inevitably. Then the first PcsE event comes, and link is down. After the second PcsE event comes, link is up. PR1604454

  • LSP installation in Packet Forwarding Engine takes a longer time. When we are trying to scale more than 32000 LSP scale. During High CPU the installation rate of NH and RT for rsvp LSP is less that is causing the delay. PR1609568