Known Limitations

Learn about known limitations 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.

EVPN

After a reboot during recovery process, the ESI LAGs come up before the BGP sessions, and routes or ARP entries are not synchronized. PR1487112

On all platforms running Junos OS or Junos OS Evolved, in a Q-in-Q environment, if xSTP is enabled on an interface that has a logical interface with vlan-id-list configured, then, it will only run on those logical interfaces whose vlan-id range includes native-vlan-id configured. All other xSTP will be in discarding state. This might lead to traffic drop. PR1532992
Tail drop is seen in WRED configuration statistics. PR1549910

Support for low power idle mode (EX4400-48T, EX4400-48P, EX4400-24T, and EX4400-24P)—Starting in Junos OS Release 21.1R1, the 1-Gbps or 100-Mpbs port switches to low power idle (LPI) mode based on the following conditions:.

When a port operates at 1-Gbps speed and no traffic is either received or transmitted, then the port enters LPI mode. If the 1-Gbps port transfers unidirectional or bidirectional traffic, then the port will not enter LPI mode.

When a port operates at 100-Mbps speed, the port switches to LPI mode, based on the direction of the traffic. The show interfaces interface-name extensive command displays RX LPI when there is no RX traffic and TX LPI when there is no TX traffic.

You can view the interface that is in LPI mode by executing the show interfaces interface-name extensive command. The output field IEEE 802.3az Energy Efficient Ethernet displays the status of the LPI mode.

[See show interfaces extensive .]

Unsupported options can be seen under "restart" command. PR1545558
Python script is not supported in ZTP workflow. Python can run (during ZTP) only in few QFX Series based flex images. PR1547557