Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?



  • Support for Flexible Ethernet services (QFX10002, QFX10008, and QFX10016)—Starting in Junos OS Release 22.3R1, you can configure Flexible Ethernet services encapsulation on the QFX10000 line of switches. This configuration ensures that the switches support multiple logical interfaces on the same physical interface mapped to the same bridge domain.


    The QFX10002-60C switches do not support this feature.

    [See Flexible Ethernet Services Encapsulation.]

  • Support for IS-IS BFD-enabled sub-TLV (MX2010, MX2020, PTX10000, PTX10008, and PTX10016)—Starting in Junos OS Release 22.3R1, the strict BFD feature allows IS-IS to converge only when BFD is up, and it sends the UP notification to IS-IS. We've introduced a new state in the IS-IS adjacency state machine (InitStrictBFD state) to indicate the agreement between routers to support strict BFD. We've also added a new BFD IS-IS Hello (IIH) PDU TLV in IS-IS hello packets.

    If BFD is unstable, to prevent the traffic from being compromised until the IS-IS adjacency timer expires, configure the hold-down interval (in milliseconds). This configuration delays sending the UP notification to the BFD client. After the BFD is up, the hold-down interval starts, and upon expiration, a BFD UP notification is sent to IS-IS so that IS-IS can start forming an adjacency.

    We've added the following statements for this feature:

    • strict-bfd at the [edit protocols isis interface name level level ] hierarchy level.

    • holddown-interval at the [edit protocols isis interface interface family inet bfd-liveness-detection] hierarchy level.

    [See Configuring BFD, interface (Protocols IS-IS), and bfd-liveness-detection (Protocols IS-IS).]

  • Support for 128 Down-Link Interfaces during Uplink Failure Detection (QFX5120-32C and QFX5120-48Y)—Starting in Junos OS Release 22.3R1, the number of down-link interfaces supported during the Uplink Failure Detection is increased from 48 down-link interfaces to 128 down-link interfaces.

    [See Network Management and Monitoring Guide].