Juniper Day One+ ACX7100-48L User manual
Day One+
ACX7100-48L
IN THIS GUIDE
Step 1: Begin | 1
Step 2: Up and Running | 7
Step 3: Keep Going | 11
Step 1: Begin
IN THIS SECTION
Meet the ACX7100-48L | 1
Install the ACX7100-48L | 2
Power On | 4
In this guide, we provide a simple, three-step path, to quickly get you up and running with your new ACX7100-48L. 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 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
IN THIS SECTION
What's in the Box? | 2
What Else Do I Need? | 2
Install the ACX7100-48L in a Rack | 3
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
•An RJ-45 to DB-9 serial port adapter
•A breakout cable to simultaneously connect to a console and to a time of day (TOD) device
•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
2
•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
•Two M5 pan head screws to secure the grounding lug
CAUTION: 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.
g101177
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.
3
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.
g101178
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).
g101180
9. Verify that the mounting brackets on each side of the rack are level.
NOTE: 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.
4
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 M5 pan head 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.
g101171
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.
g101161
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.
5
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.
g101188
WARNING: 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.
NOTE: 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 7through 14 to power on the second power supply.
6
Plug and Play
The ACX7100-48L router ships with factory-default settings that enable plug-and-play operation. These settings load as
soon as you power on the router.
Customize the Basic Configuration
You can easily customize the factory-default configuration with just a few commands. Initially, you’ll need to make changes
through the console port. After you configure the management port, you can access the ACX7100-48L using SSH and
make additional configuration changes. You can always revert to the factory-default configuration whenever you want.
Have the following information ready before you begin customizing the router:
•Hostname
•Root authentication password
•Management port IP address
•Default gateway IP address
•IP address and prefix length of remote prefixes
•(Optional) SNMP read community, location, and contact information
1. Verify that the following default serial port settings are configured on your laptop or desktop PC:
•Baud Rate—9600
•Flow Control—None
•Data—8
•Parity—None
•Stop Bits—1
•DCD State—Disregard
2. Connect the console port on the ACX7100-48L to a laptop or desktop PC using the RJ-45 cable and RJ-45 to DB-9
adapter. The console (CON) port is the lower RJ-45 port on the right side of the port panel.
NOTE: If your laptop or desktop PC doesn’t have a serial port, use a serial-to-USB adapter (not provided).
3. At the Junos OS login prompt, type root to log in.
You don't need to enter a password. If the software boots before you connect your laptop or desktop PC to the console
port, you might need to press the Enter key for the prompt to appear.
re0 login: root
8
4. Start the CLI.
[vrf:none] root@re0:~# cli
5. Enter configuration mode.
root@re0> configure
6. Stop the chassis auto-upgrade process.
[edit]
root@re0# delete chassis auto-image-upgrade
7. Stop zero-touch provisioning (ZTP).
[edit]
root@re0# delete system commit factory-settings
NOTE: ZTP is enabled on the ACX7100-48L in the factory-default configuration. You must stop ZTP before
you configure any settings. Until you assign a root password and make an initial commit, you might see
ZTP-related messages on the console. You can safely ignore these messages while you configure the root
password.
8. Add a password for the root administration user account.
[edit]
root@re0# set system root-authentication plain-text-password
New password: password
Retype new password: password
9. Commit the configuration, and wait for the ZTP process to stop.
[edit]
root@re0# commit
A message appears on the console, confirming that the ZTP process has stopped.
root@re0# [ 968.635769] ztp.py[20083]: 2021-06-09 16:47:52 INFO: ZTP: aborted in state
DISCOVERING_INTERFACES
[ 968.636490] ztp.py[20083]: 2021-06-09 16:47:52 INFO: ZTP: checkZTPAbort: Upgrade detected
pending abort
[ 968.636697] ztp.py[20083]: 2021-06-09 16:47:52 INFO: ZTP: aborted by user config commit
[ 968.782780] ztp.py[11767]: Notice: PID found for app ztp in /var/run/pid/ztp.pid is
20083.Executing command: (/usr/sbin/cleanzk -c /var/run/zkid/20083.id;rm /var/run/zkid/20083.id
9
2>/dev/null)
10. (Optional) Give the router a name. If the name includes spaces, enclose the name in quotation marks (“ ”).
[edit]
root@re0# set system host-name host-name
11. Configure the default gateway.
[edit]
root@re0# set routing-options static route 0.0.0.0/0 next-hop destination-ip
12. Configure the IP address and prefix length for the management port on the router.
On the ACX7100-48L, the management (MGMT) port is the upper RJ-45 port on the right side of the port panel.
[edit]
root@re0# set interfaces re0:mgmt-0 unit 0 family inet address address/prefix-length
13. (Optional) Configure specific static routes to remote prefixes if you do not want the remote prefixes to use the default
route.
[edit]
root@re0# set routing-options static route address/prefix-length next-hop destination-ip
14. Enable Telnet service, if required.
[edit]
root@re0# set system services telnet
NOTE: When Telnet is enabled, you cannot log in to the ACX7100-48L through Telnet using root credentials.
Root login is allowed only for SSH access.
15. Enable SSH service.
[edit]
root@re0# set system services ssh
16. To allow users to log in to the router as root through SSH, include the root-login statement.
[edit system services ssh]
root@re0# root-login allow
10
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