Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?



  • Perpetual PoE (EX4400-24MP, EX4400-24P, EX4400-48MP, and EX4400-48P)—Starting in Junos OS Release 22.1R1, you can configure perpetual PoE on EX4400 switches that support Power over Ethernet (PoE). Perpetual PoE provides uninterrupted power to connected powered devices even when the power-sourcing equipment switch is rebooting.

    [See Configuring Perpetual PoE and Fast PoE.]

  • Support for 100M optics on 1GbE ports (EX4400-48F)—Starting in Junos OS Release 22.1R1, we support 1-Gbps speed on the first 36 ports of PIC 0.

    Use the following 100M optics on these 1GbE ports of EX4400-48F switches:

    • EX-SFP-1FE-FX
    • EX-SFP-1FE-LX
    • EX-SFP-FE20KT13R15
    • EX-SFP-FE20KT15R13

    [See Port Speed for EX4400-48F.]