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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.

General Routing

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

  • The runt, fragment and jabber counters are not incrementing on EX4300-MPsPR1492605

  • During Routing Engine switchover interface flap might be seen along with Scheduler slippage. PR1541772

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

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

  • EVPN VxLAN::DHCP-Snooping - vtep interface is seen in the dhcp-security binding table even for the directly connected clients. PR1657597

  • With SFP+-10G-CU3M DAC, link stays up when the peer end device MX10008 is admin down. There is no Rx signal loss received from the peer end for EX4100 link to go down. Same scenario works with other platforms.PR1640799

  • Interop for 1G interfaces between EX4100 SKUs and ACX5448/ACX5448-M/D or MX480 will not work.PR1657766

  • EX4100 MACsec interface statistics of encrypted/decrypted bytes won't be updating properly after a certain value.PR1658584

  • EX4600 devices VC (Virtual-chassis) is in unstable state for 3-7 minutes causing traffic loss.PR1661349

  • Some of interfaces getting zero statistics in monitor interface traffic command. Sending traffic across all interfaces and applied speed of 100m on all 1g copper ports. Clearing statistics for interfaces, the issue is seen.PR1661617

  • On EX92XX Series platforms with the EVPN-VXLAN (Ethernet VPN-Virtual Extensible LAN) scenario, the DHCP (Dynamic Host Configuration Protocol) packets from the client get dropped while tunneling to the EVPN-VXLAN. When this happens, the packets will not reach the DHCP server and the host could not get the IP address.PR1662524

  • On EX4300-48MP, NSSU abort is seen with error: rebooting VC. VC instability and dc-pfe core is observed after reboot.PR1668414

  • On the 48 Port SKU, tagged packet greater than MTU size 1518 gets dropped due to BCM EGR_MTU set to 1518 on ports 0-24. Mitigation is to set interface MTU to 1518.PR1677902

  • If 1G optic is inserted on uplink ports of EX4100-24mp/24mp/48p/48t/24p/24t SKUs, then the activity LED is lit irrespective of link present/up status.PR1682633

Forwarding and Sampling

  • When the fast-lookup-filter statement is configured with a match that is not supported in the FLT hardware, traffic might be lost. PR1573350

Layer 2 Features

  • On EX4600 platforms, if a change related to TPID is made in the Device Control Daemon, traffic might be dropped in PFE due to failure on l2 learning or interfaces flapping. PR1477156

Platform and Infrastructure

  • EX4400-48MP - VM cores and VC split might be observed with multicast scale scenario. PR1614145

  • On EX4300 platform, this issue occurs only when chassisd got restarted after filter configuration. This results in MAC-address change and sometimes MAC-address collision as well.PR1615548

  • 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