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Step 1: Begin

In this guide, we provide a simple, three-step path, to quickly get you up and running with your new Juniper Networks® ACX7100-48L Cloud Metro Router. We’ve simplified and shortened the installation and configuration steps, and included how-to videos. You’ll learn how to install an AC-powered ACX7100-48C in a rack, power it up, and configure basic settings. If you need instructions for installing a DC-powered ACX7100-48L, see the ACX7100-48L Hardware Guide.

Meet the ACX7100-48L

The ACX7100-48L Cloud Metro Router is a high-performance router, featuring a 1-U form factor that provides high port density, reliability, and scalability. You can deploy the router as an aggregation solution in a service provider metro network or in a data center that hosts edge computing applications.

With 48 SFP and 6 QSFP56-DD ports, the ACX7100-48L routers enable a wide variety of configurations that include support for 10-Gbps, 25-Gbps, 40-Gbps, 50-Gbps, 100-Gbps, and 400-Gbps speeds.

We ship these routers with redundant power supplies. You can order ACX7100-48L routers with front-to-back airflow (AIR OUT or AFO) or back-to-front airflow (AIR IN or AFI), and with AC or DC power supplies.

Install the ACX7100-48L

What's in the Box?

  • ACX7100-48L router with six preinstalled fan modules and two preinstalled AC power supplies

  • Two AC power cords appropriate for your geographical location

  • A breakout cable to simultaneously connect to a console and to a time of day (TOD) device

  • Two power cord retainers

  • A four-post rack mounting kit that contains:

    • Two mounting rails for mounting the router flush with the front posts of a rack

    • Twelve flat head Phillips screws for attaching the front mounting rails to the router

    • Two rear mounting blades

What Else Do I Need?

  • Someone to help you secure the router to the rack

  • A number 2 Phillips (+) screwdriver

  • An electrostatic discharge (ESD) grounding strap

  • A management host such as a laptop or desktop PC

  • A serial-to-USB adapter (if your laptop or desktop PC doesn’t have a serial port)

  • A grounding cable: 14-10 AWG (2-5.3 mm²), stranded wire, or as permitted by the local code, with a Panduit LCD10-10A-L or equivalent lug attached

  • An RJ-45 to DB-9 serial port adapter


    We no longer include a DB-9 to RJ-45 cable or a DB-9 to RJ-45 adapter with a CAT5E copper cable as part of the device package. If you require a console cable, you can order it separately with the part number JNP-CBL-RJ45-DB9 (DB-9 to RJ-45 adapter with a CAT5E copper cable).

  • Two #10-32 screws to secure the grounding lug


    Ensure that a licensed electrician has attached the appropriate grounding lug to your grounding cable. Using a grounding cable with an incorrectly attached lug can damage the router.

Install the ACX7100-48L in a Rack

Here’s how to install the ACX7100-48L in a four-post rack:

  1. Review the General Safety Guidelines and Warnings.
  2. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end to a site ESD point.
  3. Decide which end of the router you want to place at the front of the rack. Position the router so that the AIR IN labels are facing the cold aisle, or the AIR OUT labels are facing the hot aisle.
  4. Attach the mounting rails to the sides of the router using the 12 flat head screws.
  5. Lift the router and position it in the rack. Line up the bottom hole in each mounting rail with a hole in each rack rail, making sure the router is level.
  6. While you’re holding the router in place, have a second person insert and tighten the rack mount screws to secure the mounting rails to the rack rails. Make sure they tighten the screws in the two bottom holes first, and then tighten the screws in the two top holes.
  7. Continue holding the router in place, and have the second person slide the mounting blades into the channel of the mounting rails.
  8. Secure the mounting blades to the rack using the rack mount screws (and cage nuts and washers, if your rack requires them).
  9. Verify that the mounting brackets on each side of the rack are level.

    If you have unused ports, plug them using dust covers to prevent dust from entering the router.

Power On

Now that you’ve installed your ACX7100-48L in the rack, you’re ready to connect it to power.

The AC-powered ACX7100-48L comes with two AC power supplies preinstalled on the rear panel.

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end to one of the ESD grounding points on the router.
  2. Use two #10-32 screws to secure the grounding lug and attached cable to the chassis. Attach the lug through the left rail and blade assembly to the chassis.
  3. Connect the other end of the grounding cable to a proper earth ground, such as the rack.
  4. Dress the grounding cable and ensure that it doesn’t touch or block access to other device components, and that it doesn’t drape where people could trip over it.
  5. Ensure that the power supplies are fully inserted in the chassis and the latches are secure.
  6. For each power supply, ensure that the loop on the power cord retainer is open and there’s enough space to insert the power cord coupler into the inlet. If the loop is closed, press the small tab on the retainer to loosen the loop.
  7. On the first power supply, thread the power cord coupler through the power cord retainer loop.
  8. Plug in the power cord to the power supply socket.
  9. Slide the power cord retainer loop toward the power supply until the loop is snug against the base of the coupler.
  10. Press the tab on the loop, and draw out the loop into a tight circle.

    Ensure that the power cord does not block access to router components or drape where people can trip on it.

  11. If the AC power source outlet has a power switch, turn it off.
  12. Plug in the power cord to the AC power source outlet.
  13. If the AC power source outlet has a power switch, turn it on.

    The router powers on as soon as you connect it to power. The ACX7100-48L doesn't have a power switch.

  14. Verify that the AC LED on the power supply is lit green. If the LED is lit steadily amber or is blinking amber, disconnect the power supply from the power source, and replace the power supply (see Maintain the ACX7100-48L Power Supplies in the ACX7100-48L Hardware Guide).
  15. Repeat steps 7 through 14 to power on the second power supply.