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Known Limitations

Learn about limitations in this release 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

  • G.8275.1- G.8273.2 1PPS cTE performance test may be marginally outside class-C for PTP BC on ACX7100-48L, especially for mixed speed port testing with combinations of 10G / 25G channelized ports and 100G ports. On each reboot, the 1PPS cTE measurement may be within the class-C measurement threshold, or may randomly be out of threshold by a few nanoseconds.PR1607381

  • PTP to PTP Noise transfer will be failing for frequencies 1. 0.03125 HZ 2. 0.123125 HZ PR1608786

  • During FPC offline CLI command execution, in case PIC is in onlining transition state, then user needs to wait for 5 minutes to get the FPC state. Alternatively, User should check PIC status along with FPC status for FPC online/offline CLI execution. For online CLI action, make sure FPC and PIC status are in offline state before triggering the online CLI. For offline CLI action, make sure FPC and PIC status are in online state before triggering the offline CLI.PR1738954

  • ACX7024 ports support 10G/1G/25G multi-rate. When peering with other platform or other vendor devices, For example using SFP-LX10 for 1G connection, the link may remain physically down The reason is Auto-negotiation is not supported in ACX7024 PFE due to Broadcom limitation. In order to make it work, user has to explicitly configure speed/duplex on both sides, and disable auto-negotiation on the peer side PR1759804

  • On ACX, among the cpu queues, few protocols share a single cpu queue. During queue sharing, any DDOS violation caused by a particular protocol traffic, triggers violations for all the protocols mapped to that CPU queue. This is a design limitation. PR1810673

  • MTU config is only supported on IFL family level in ACX platform to generate ICMP packet too big error when MTU exception is HIT . Customer has to adapt the config on ACX box . For Ex: instead of configuring MTU on IFD like below set interfaces et-0/0/0 mtu 1400 we need to configure mtu like below on IFL family level delete interfaces et-0/0/0 mtu 1400 set interfaces et-0/0/0 unit 0 family inet mtu 1400 PR1828681