Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?



  • Multichassis link aggregation groups (MC-LAGs) (ACX7100-32C and ACX7100-48L)—Starting in Junos OS Evolved Release 22.1R1, the following features are available on MC-LAGs:

    • Layer 2 bridging for active-active and active-standby modes
    • Layer 2 unicast without IGMP snooping
    • Layer 3 unicast without IGMP snooping

    [See Understanding Multichassis Link Aggregation Groups.]

  • Support for SFP56+ QFX5K-FPC-20Y FPC (QFX5700)—Starting in Junos OS Evolved Release 22.1R1, you can configure 10 and 25-Gbps speed with the new QFX5K-FPC-20Y FPC card. The line card contains a total of 20 SFP56 ports that supports 10-Gbps and 25-Gbps speeds. You can use all the 20 ports by plugging the FPC on the 0, 2, 4, and 6 slots and use the first 16 ports by plugging the FPC on the 1, 3, 5, and 7 slots. To view the hardware compatibility matrix for optical interfaces, transceivers, and DACs supported on QFX5700, see the Hardware Compatibility Tool (HCT).

    [See Channelizing Interfaces on QFX5700 Switches and Hardware Compatibility Tool.]

  • Support for 400G ZR-M DWDM optics (PTX10001-36MR)—

    Starting in Junos OS Evolved Release 22.1R1, we support 400G ZR-M DWDM optics. 400G ZR-M is a new variant optics that functions similar to the existing 400G ZR. 400G ZR-M enables flat architecture, simple, and Point to Point (PtP) DWDM system. We support the following features as part of 400G ZR-M:

    • Support for 6.25, 75, 100 grid spacing.

    • Support for optical loopbacks. To enable optics loopback, use the existing loopback statement at the [edit interfaces optics-options] hierarchy level.

    • Support for performance monitoring and TCA. TCAs provide the management system an early indication of the deteriorating health of an optical network connection when the performance parameter that you monitor crosses a certain threshold. You can view the current and historical performance monitoring metrics which are accumulated into 15-minute and 1-day interval bins by using the show interfaces transport pm command. You can thus manage optical transport link efficiently.

    [See optics-options, show chassis hardware, show interfaces, show interfaces diagnostics optics, show chassis pic, and show interfaces transport pm .]