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SRX240 Services Gateway Built-In Interfaces


Table 1 describes the built-in interface ports on the SRX240 Services Gateway.

Table 1: SRX240 Services Gateway Built-In Interfaces

Interface Type



Gigabit Ethernet

  • 16 ports, labeled 0/0 through 0/15, built into the chassis front panel

  • Provide link speeds of 10/100/1000 Mbps

  • Operate in full-duplex and half-duplex modes

Note: On the PoE models of the SRX240 Services Gateway, all 16 Gigabit Ethernet ports support PoE.

Function as front-end network ports and provide LAN and WAN connectivity to hubs, switches, local servers, and workstations.

Universal Serial Bus (USB)

  • Two ports labeled, usb 0 and usb 1, built into the chassis front panel

  • Function in the following modes:

    • Full speed

    • High speed

  • Compliant with USB revision 2.0

  • Support a USB storage device that functions as a secondary boot device in case of internal flash failure on startup.

    Note: To use USB to boot your services gateway, you must install and configure the USB storage device on the USB port to use it as a secondary boot device. Additionally, the USB storage device must have Junos OS installed.

  • Provide the USB interfaces that are used to communicate with the various types of Juniper Networks-supported USB storage devices.

    Contact a customer service representative for more information.


  • One port built into the chassis front panel

  • Uses an RJ-45 serial cable connector

  • Supports the RS-232 (EIA-232) standard

  • Functions as a management port using which you can log in to the services gateway directly.

  • Provides the interface to configure the services gateway using the CLI.

Mini-PIM slots

  • Four slots built into the chassis front panel

  • Mini-PIMs can be plugged directly into the slots

Provide LAN and WAN functionality along with connectivity to various media types.

For more information about Mini-PIMs, see the SRX Series Services Gateways for the Branch Physical Interface Modules Hardware Guide  .


If you face a problem running a Juniper Networks device that uses a third-party optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you diagnose the source of the problem. Your JTAC engineer might recommend that you check the third-party optic or cable and potentially replace it with an equivalent Juniper Networks optic or cable that is qualified for the device.