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Open Issues

Learn about open issues in this release for EX Series switches.

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

Network Management and Monitoring

  • Device schema leaf may not populate the appropriate values through jvision/telemetry. PR1726505

Platform and Infrastructure

  • On EX4400-48MP devices, VM cores and VC split might occur with multicast scale scenario. PR1614145

  • On EX4300 devices, if you configure encapsulation ethernet-bridge, the interface is getting programmed as trunk instead of access in VLAN membership. This leads to untagged traffic drop. PR1665785

  • On EX4300-24T, EX4300-48P, EX4300-VC, EX430024P, EX430032F and EX430048T platforms, when a VSTP (VLAN Spanning Tree Protocol) BPDU (Bridge Protocol Data Unit) arrives with a VLAN ID that is not configured in the switch, but that matches with an HW Token of any other configured VLAN, the VLAN ID of the BPDU will be changed to the VLAN ID corresponding to the matched HW Token and flooded. This disrupts STP convergence on the configured VLAN because some ports can incorrectly go into blocking state. PR1673000

  • When VLAN is added as an action for changing the VLAN in both ingress and egress filters, the filter is not installed. PR1362609

  • Runt, fragment and jabber counters are not incrementing on EX4300-MPs devices. PR1492605

  • On EX4300-48MP devices, if POE is enabled, a primary Routing Engine might reconnect that might impact traffic. PR1499771

  • On EX2300, EX3400, EX4300-48MP, and EX4300 , pause frames counters does not get incremented when pause frames are sent. PR1580560

  • On EX4400 devices, sometimes login prompt is not shown after the login session ends. PR1582754

  • On EX4100-24mp, EX4100-48mp, EX4100-24p/t, EX4100-48p/t, EX4100-F-24p/t, and EX4100-F-48-p/t devices, in an interop scenario, when you use the 1G SFP Optic on PIC-2, auto-negotiation should be disabled on the peer. PR1657766

  • On EX4600 devices, the Virtual Chassis is in unstable state for 3 to7 minutes causing traffic loss. PR1661349

  • On EX4100 and EX4100-F devices, PIC 1 ports with 1G optic will display AN enabled but it is not enabled in the hardware. Example: user@device# run show interfaces ge-0/1/1 media .. .. Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled, Remote fault: Online, Media type: Fiber. PR1666227

  • On the EX4600 device with SFP-LX10/SFP-SX, after a power cycle/software reboot, all ports are initialized and links are up with auto-negotiation enabled. Few ports are up and traffic flows whereas few ports are up but no traffic flow through them.PR1672583

  • If MVRP is enabled on an MSTP enabled interface, the interface will be made part of all the existing instances on the switch, So, if there are two interfaces between R1 and R2 as below: R1(et-0/0/1 and et-0/0/2)======(et-0/0/1 and et-0/0/2)R2 And one interface is MVRP enabled (say et-0/0/1), and et-0/0/2 is not MVRP enabled. By configuration et-0/0/1 is part of MSTI-1 and et-0/0/2 is part of MSTI-2. MSTI-1 is running on vlan-100 and MSTI-2 is running on Vlan-200. R2 in this case, is advertising only vlan-100. The MVRP enabled interface will become part of all the MSTIs(MSTI-1 and MSTI-2 both) configured on the device and it will take part in the FSM of all the MSTIs. Although et-0/0/1 is not member interface of vlan-200(correspnding to MSTI-2). This potentially can cause a problem where et-0/0/1 although not a vlan-200 member, will go into FWD state and et-0/0/2, genuine member of vlan-200 goes into BLK state for MSTI-2. So, when traffic is received in vlan-200 it will be sent out of et-0/0/1, an it will be dropped.PR1686596

  • When port beacon LED for port is enabled, show chassis led cli output shows incorrect port LED status for interfaces as lit up instead of off. PR1697678

  • The EX4600 devices with Redundant Trunk Group (RTG) configured, after VCP port between members of EX4600 disconnect and connect again. Mac address entry created in RTG cannot ageout. PR1707878

  • [DOT1X with GBP]:dot1x EAP authentication might not authenticate successfully. PR1728538

  • When packets of size bigger than 1518 Bytes are received/transmitted, pps counter value does not show correct value. PR1700309

  • In a rare scenario, due to timing issues, the Packet Forwarding Engine (PFE) crash is observed on Junos EX4300 platforms. This causes traffic loss until the PFE comes up. PR1720219

  • On Junos EX series platforms, VRRP (Virtual Router Redundancy Protocol) sync will be delayed impacting the VRRP traffic if the device receives a VRRP packet when setting up the 'mac-move-limit' configuration. PR1725042

  • After BIOS upgrade of EX4400-VC, device mode will be changed to HiGig mode if they are operating in HGoE mode earlier. PR1725683

  • In a heaviliy loaded system in a specific scenario (Dot1x in multiple supplicant mode and dynamic vlan from radius server and non vxlan access port) following log message may be captured in the syslog - {brcm_as_dot1x_vxlan_set_mac_learning_mode:1168 dot1x bd_get failed for bd index 0}. This log is not impacting any funtionality. PR1733365

Routing Protocols

  • When the shortest-path-first (SPF) algorithm for IS-IS gets triggered frequently, CPU usage might increase and impact the device performance and traffic. PR1667575

Virtual Chassis

  • On Junos EX4600 Virtual Chassis (VC), the primary Routing Engine reboot and all-members reboot lead to the Packet Forwarding Engine Manager hogging logs when SFP-T pluggable gets installed. The Packet Forwarding Engine Manager hogging logs has no functionality impact.PR1685067

  • On EX4600 Virtual Chassis (VC), when you execute the request system reboot all members command, post-reboot one of the VC member/Flexible PIC Concentrator(FPC) might disconnect and join the VC back due to Packet Forwarding Engine (PFE) restart. Traffic loss is seen when FPC is disconnected. PR1700133