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Interfaces

  • Support for 1G speed (MX304)—As of Junos OS Release 23.1R1, the MX304 now supports 1G speeds. The addition of 1G support is beneficial for customers maintaining older 1G connections and for low-speed uplink/downlink applications. The chassis offers 1G options in the port profile configuration, which is available on all ports. Previously, MX devices only supported speeds of 400G, 100G, 40G, 10G, and 25G.

    [See Port speed on MX304 Router Overview].

  • Permanent MAC address for aggregated Ethernet interface (MX240, MX480, MX960, MX2008, MX2010, MX2020, and VMX)—Starting in Junos OS Release 23.1R1, the number of static MAC addresses increases for:

    • VMX, MX240, MX480, and MX960 from 16 to 80.

    • MX2008, MX2010, and MX2020 from 0 to 80.

    The chassid process (chassisd) now allocates MAC addresses to aggregated Ethernet interfaces in this pattern:

    • First 16 interfaces receive addresses from a private MAC pool.

    • Next 64 ae interfaces receive addresses from a reserved public MAC pool.

    • Rest of the ae interfaces receive addresses from a public MAC pool.

    [See static-mac.]

  • New extension module (EX4400)—Starting in Junos OS Release 23.1R1, we support a new 1x100GbE QSFP28 extension module (model number: EX4400-EM-1C). The extension module port can act both as a network port or a Virtual Chassis port (VCP). The module can support MACsec AES256 in network port mode. You can also channelize the extension module to support 4x25 GbE and 4x10 GbE. Channelization is not supported on VCP port.

    [See Channelizing Interfaces on EX4400 Switches and Port Speed.]