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Open Issues

Learn about open issues in this release for ACX Series routers.

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

General Routing

  • VXLAN VNI (multicast learning) scaling on QFX5110 traffic issue is seen from VXLAN tunnel to Layer 2 interface. PR1462548

  • On WRL8 based VMHost platforms (i.e., ACX6360/PTX10001/MX150/NFX150/NFX250/NFX350), there is no log rotation for resild log and temperature sensor info is incorrectly written into resild log which could result in continuous logs in resild log file. The disk usage might keep increasing due to this issue. The disk usage could be eventually full which could cause system to hang and reboot. PR1480217

  • Due to BRCM KBP issue route lookup may fail. Need to upgrade KBP to address this issue, Due to high risk KBP SDK upgrade planned for 21.1. PR1533513

  • Service MIC does not work on ACX500 running Junos 20.4 or higher. PR1569103

  • On all ACX Platforms, the hosts will not receive multicast traffic when snooping is configured in a EVPN-MPLS (Ethernet Virtual Private Network - Multiprotocol Label Switching) enabled broadcast domain.PR1613462

  • A vulnerability in class-of-service (CoS) queue management in Juniper Networks Junos OS on the ACX2000 Series devices allows an unauthenticated network-based attacker to cause a Denial of Service (DoS). PR1637615

  • When TCP Main and TCP remaining attached together on IFD it is observed that Improper Scheduler MAP is getting configured on HQoS IFD while sched params modification and bind are performed on the same commit. This is a sequence issue from CoSD(RE) which is not guaranteed on the PFE side.PR1664785

  • In VPLS MH cases, the standby UNI IFL in backup router will be programmed in disable state, by adding the UNI interface to invalid vpn id in HW. During switch over the UNI IFL will be deleted and will be added under the VPLS instance VPN ID. In issue case, UNI interface added under invalid VPN ID in backup router is tried to deleted by passing the VPLS instance VPN ID, causing the issue. This issue is applicable only for ACX5000 Series. PR1665178

  • The AE statistics might show 0 bps for output traffic. It is a CLI output display issue. It will be fixed in the future releases. It does not impact the traffic output.PR1689185

  • In a device with LACP configured and high rate of LLDP PDU packets of the order of around 400 PPS, LACP link state transitions were observed.PR1696723

  • FIPS mode is not supported in this release for SRXSME devices.PR1697999

  • On ACX5048 and ACX5096 acting as PE (Provider End) routers, when the VPLS (Virtual Private LAN Service) gets switched multiple times between the primary path and backup path after some time programming fails and the software starts throwing errors. It will impact VPLS services.PR1720141

  • We might encounter jdhcpd core during initialization. The core in rare, and there is no service impact because of this core (as the process recovers immediately). PR1730717

  • On ACX5448 platforms, the Tx laser is not turned off even if the port is disabled. This can be identified with the command show interfaces diagnostics optics. There is no service impact due to this issue. PR1735670

  • On ACX1000 and ACX2000 platforms, when a lo0.x filter is configured under a VRF type routing-instance, any IPv4 transit traffic that makes ARP request to generate to the CE-facing interfaces will fail in ARP resolution due to the ARP request packets are discard by lo0.x filter if no specific term to accept the IPv4 packets. PR1737999

  • On ACX1000, ACX2000 and ACX3000 platforms, MPLS load-balancing on AE (Aggregated Ethernet) interfaces with more than one member link might not work as expected after upgrading Junos OS to 20.1R1 or later releases. PR1739480

  • [TWM Clocking Solution] - chassis clock status should not move to holdover while switching between PTP path alone. PR1745604

  • COS:ACX5448: Deactivate/Activate of fixed classifier does not work with wildcards configured. PR1754019

  • On ACX5448 and ACX710 platforms, the Layer 3 interface default classifier is ipprec-compatibility, but after reboot another default classifier is taking effect - ieee8021p-default. PR1754547

  • Due to software issue with initialization sequence, the PTP encapsulation does not get applied with PTP configuration on ge interfaces. Because of this, PTP feature is impacted on ge interfaces.PR1755852

  • EXP bits are not modified according to default rewrite rule for bottom label on ACX5448. PR1757906

  • ACX5448: cfm is stuck in start state between dut and service edge router. PR1760482


  • NTP time drift on the affected Junos releases. Earlier implementation of kvmclock with vDSO (virtual Dynamic Shared Object) which helps avoid the system call overhead for user space applications had problem of time drift, the latest set of changes takes care of initializing the clock after all auxiliary processors are launched so that the clock initialization is accurate.PR1691036