Juniper MX204 User manual

MX204 3D Universal Edge Router Quick
Start
January 2018
Part Number: 530-083413
Revision 04
This document describes how to install the Juniper Networks®MX204 3D Universal Edge
Router.
Contents MX204QuickStartDescription.........................................3
Step 1: Prepare the Site for MX204 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
MX204RouterRackRequirements..................................5
RouterClearanceRequirements....................................6
Router Cooling and Airflow Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Tools Required to Prepare the MX204 Router for Installation . . . . . . . . . . . . . . 7
Step 2: Install the MX204 Chassis in the Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step3:ConnecttheGroundingCable...................................10
Step 4: Connect External Devices and Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Connect the Router to a Network for Out-of-Band Management . . . . . . . . . . 12
Connect the Router to a Console Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Connect the Router to External Clocking and Timing Devices . . . . . . . . . . . . . 14
Connect 1-PPS and 10-MHz Timing Devices to the Router . . . . . . . . . . . . 14
Connect a Time-of-Day Device to the Router . . . . . . . . . . . . . . . . . . . . . . 14
Connect a BITS External Clocking Device to the Router . . . . . . . . . . . . . . 15
Step5:ConnectPowerCables.........................................15
ConnectPowertoanACRouter....................................16
ConnectPowertoaDCRouter.....................................17
Step 6: Perform Initial Software Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
EnterConfigurationMode.........................................19
Configure User Accounts and Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
ConfigureSystemAttributes......................................20
CommittheConfiguration.........................................21
SafetyWarnings....................................................22
ComplianceStatementsforNEBS.....................................24
Compliance Statements for EMC Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Canada .......................................................24
EuropeanCommunity............................................24
1Copyright © 2018, Juniper Networks, Inc.

Israel .........................................................24
Japan .........................................................25
UnitedStates...................................................25
Junos OS Documentation and Release Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
RequestingTechnicalSupport.........................................25
Self-Help Online Tools and Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
OpeningaCasewithJTAC........................................26
RevisionHistory....................................................26
Copyright © 2018, Juniper Networks, Inc.2
MX204 3D Universal Edge Router Quick Start

MX204 Quick Start Description
This Quick Start contains information you need to install and configure the router quickly.
For complete installation instructions, see the MX204 3D Universal Edge Router Hardware
Guide at http://www.juniper.net/techpubs/.
WARNING: This Quick Start contains a summary of safety warnings in “Safety
Warnings” on page 22. For a complete list of warnings for this router, including
translations, see the MX204 3D Universal Edge Router Hardware Guide at
http://www.juniper.net/techpubs/.
The Juniper Networks MX204 3D Universal Edge Router is an Ethernet-optimized edge
router with 400-Gbps capacity that provides both switching and carrier-class Ethernet
routing. The MX204 router runs Junos operating system (Junos OS), enabling a wide
range of business and residential applications and services, including high-speed transport
and virtual private network (VPN) services, next-generation broadband multiplay services,
and high-volume Internet data center internetworking. Each router provides full duplex,
high-density Ethernet interfaces and high-capacity switching throughput and uses the
Junos Trio chipset for increased scalability of Layer 2 and Layer 3 packet forwarding,
buffering, and queuing.
The MX204 router is compact and one rack unit (1 U) tall. Several routers can be stacked
in a single floor-to-ceiling rack for increased port density per unit of floor space.
The MX204 router is a fixed-configuration router, and supports one built-in Routing
Engine. The router runs on AC or DC power, with two dedicated power supply modules
on each device. Cooling is handled by three fan modules.
The MX204 has four rate-selectable ports that can be configured as 100-Gigabit Ethernet
ports or 40-Gigabit Ethernet ports, or each port can be configured as four 10-Gigabit
Ethernet ports (by using a breakout cable). The MX204 also has eight 10-Gigabit Ethernet
ports. The four rate-selectable ports support QSFP28 and QSFP+ transceivers, whereas
the eight 10-Gigabit Ethernet ports support SFP+ transceivers.
Figure 1 on page 3 shows the front of the MX204 router.
Figure 1: Front View of the MX204 Router
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Figure 2 on page 4 and Figure 3 on page 4 shows the rear of the fully configured routers.
3Copyright © 2018, Juniper Networks, Inc.
MX204 Quick Start Description

Figure 2: Rear View of the AC-Powered MX204 Router
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1 2
2—1— Power supply modules (AC)Fan modules
Figure 3: Rear View of the DC-Powered MX204 Router
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1 2
2—1— Power supply modules (DC)Fan modules
The electrostatic discharge (ESD) points on the router are located both on the front and
on the rear of the chassis. Figure 4 on page 4 shows the electrostatic discharge (ESD)
point on the router.
CAUTION: Before removing or installing components, attach an ESD strap
to an ESD point, and attach the other end of the strap to your bare wrist.
Failure to use an ESD strap can result in damage to the hardware components.
Figure 4: ESD Points on the MX204 Router
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Front panel Rear panel
11
1— ESD point
Step 1: Prepare the Site for MX204 Installation
•MX204 Router Rack Requirements on page 5
•Router Clearance Requirements on page 6
•Router Cooling and Airflow Requirements on page 6
•Tools Required to Prepare the MX204 Router for Installation on page 7
Copyright © 2018, Juniper Networks, Inc.4
MX204 3D Universal Edge Router Quick Start

MX204 Router Rack Requirements
The MX204 router can be installed in a standard 19-in. rack. Many types of racks are
acceptable, including four-post (telco) racks and open-frame racks. Table 1 on page 5
summarizes rack requirements and specifications for the router.
Table 1: Rack Requirements and Specifications for an MX204 Router
GuidelinesRack Requirement
Use a four-post rack. You can mount the router on any four-post rack that provides
bracket holes or hole patterns spaced at 1 U (1.75-in./4.44-cm) increments and that
meets the size and strength requirements specified in this table.
A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated
Equipment (document number EIA-310–D) published by the Electronics Components
Industry Association (http://www.ecianow.org/).
Rack type and mounting bracket hole
spacing
•Ensure that the rack is a 19-in. rack as defined in Cabinets, Racks, Panels, and
Associated Equipment (document number EIA-310–D) published by the Electronics
Components Industry Association (http://www.ecianow.org/).
•Ensure that the rack is one of the following standard lengths:
•23.6 in. (600 mm)
•30.0 in. (762 mm)
•31.5 in. (800 mm)
•The rack rails must be spaced widely enough to accommodate the router chassis's
external dimensions (see MX204 Router Physical Specifications). The outer edges
of the mounting brackets extend the width to 19 in. (48.3 cm). The spacing of rails
and adjacent racks must also allow for the clearances around the router and rack.
•The router ships with the front-mounting brackets fixed in the front-mount position
on the chassis. You can move the rear-mounting brackets based on the depth of
the rack.
•The chassis height of 1.72 in. (4.37 cm) is approximately 1 U (rack unit).
•The rack must be strong enough to support the weight of the fully configured router,
up to 22.7 lb (10.3 kg).
•Either end of the router must be mounted flush with the rack and still be adjustable
for racks with different depths. The front and rear rack rails must be spaced between
23.62 in. (600 mm) and 31.5 in. (800 mm) front to back.
•Ensure that the spacing of rails and adjacent racks allows for the proper clearance
around the router and rack.
Rack size and strength
•Secure the rack to the building structure.
•If earthquakes are a possibility in your geographic area, secure the rack to the floor.
•Secure the rack to the ceiling brackets as well as wall or floor brackets for maximum
stability.
Rack connection to the building
structure
See Also MX204 Site Preparation Checklist•
•MX204 Installation Summary
•MX204 Router Physical Specifications
5Copyright © 2018, Juniper Networks, Inc.
MX204 Router Rack Requirements

Router Clearance Requirements
For the cooling system to function properly, the airflow around the chassis must be
unrestricted. You must allow sufficient clearance around the installed chassis for cooling
and maintenance.
If you are mounting an MX204 in a rack with other equipment, ensure that the exhaust
from the other equipment does not blow into the intake vents of the MX204 chassis.
For service personnel to remove and install hardware components, and to accommodate
the interface and power cable bend radius, there must be adequate space at the front
and rear of the router. Allow at least 24 in. (61 cm) space in the front and rear of the
router. See Figure 5 on page 6.
Figure 5: Clearance Requirements for Airflow and Hardware Maintenance
for the MX204
Router Cooling and Airflow Requirements
•The router has front-to-back or airflow out (AFO) cooling system. Air is pulled through
the front of the chassis toward the fan tray, from where it is exhausted out of the
system. The power supplies are self-cooling and are located in the rear of the router.
•For the cooling system to function properly, the airflow around the chassis must be
unrestricted. Allow at least 6 in. (15.2 cm) of clearance between side-cooled routers.
Allow 2.8 in. (7 cm) between the side of the chassis and any non-heat-producing
surface such as a wall.
•The power supplies are self-cooling and are located in the rear of the router. The
exhaust for the power supplies are also located on the rear of the chassis.
•The rack or cabinet must have an adequate supply of cooling air. See
Figure 6 on page 7.
Copyright © 2018, Juniper Networks, Inc.6
MX204 3D Universal Edge Router Quick Start

Figure 6: Airflow Through the MX204 Router
g009880
Ports FRUs
Tools Required to Prepare the MX204 Router for Installation
•Blank panels to cover any slots not occupied by a component
•Mounting brackets, supplied with the router
•Sixteen screws for securing the mounting brackets to the chassis, supplied with the
router
•Phillips (+) screwdriver, number 2, not supplied
•Four mounting screws, supplied with the router
Step 2: Install the MX204 Chassis in the Rack
To install the router in a rack or cabinet:
1. Position the router in front of the rack or cabinet.
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and to a
site ESD point.
3. Align the holes in the front mounting brackets with the holes on the side of the chassis
(see Figure 7 on page 7).
Figure 7: Attaching the Mounting Brackets
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7Copyright © 2018, Juniper Networks, Inc.
Tools Required to Prepare the MX204 Router for Installation

4. Using a Phillips (+) number 2 screwdriver, secure the mounting brackets to the router
using the mounting screws.
5. With one person on each side, hold on to the bottom of the chassis and carefully lift
it so that the mounting brackets contact the rack rails.
6. Carefully slide the router onto the mounting brackets until the front-mounting brackets
attached to the chassis contact the rack rails (see Figure 8 on page 8).
Figure 8: Installing the Router in a Four-Post Rack
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7. Install mounting screws into each of the open front-mounting holes aligned with the
rack, starting from the bottom, and secure them tightly. Figure 9 on page 8 shows
the router fully secured to the front rails of the four-post rack.
Figure 9: Router Secured by Front-Mounting Brackets
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8. On the rear of the chassis, slide the rear-mounting brackets on either side of the chassis
until the rear-mounting brackets contact the rack rails (see Figure 10 on page 9).
The rear-mounting brackets on each side of the chassis are movable. You can adjust
the brackets according to the depth of the rack.
Copyright © 2018, Juniper Networks, Inc.8
MX204 3D Universal Edge Router Quick Start

Figure 10: Installing the Rear-Mounting Brackets
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9. Install mounting screws into each of the open rear-mounting holes aligned with the
rack, starting from the bottom, and secure them tightly.
10. Visually inspect the alignment of the chassis. If the chassis is installed properly in the
rack, all the mounting screws on one side of the rack are aligned with the mounting
screws on the opposite side and the router is level. Figure 11 on page 9 shows the
router fully secured and installed in a four-post rack.
Figure 11: Router Installed in the Rack
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9Copyright © 2018, Juniper Networks, Inc.
Step 2: Install the MX204 Chassis in the Rack

Step 3: Connect the Grounding Cable
To meet safety and electromagnetic interference (EMI) requirements and to ensure
proper operation, the router must be adequately grounded before power is connected.
A protective earthing terminal bracket is required for connecting the chassis to earth
ground. This two-holed bracket attaches on the side of the chassis through the mounting
rail and provides a protective earthing terminal for the router. The grounding points are
in the form of studs sized for M5 Pan Head screws. The M5 Pan Head screws with
integrated washers are provided in the accessory kit. The grounding points are spaced
at 0.75-in. (19.1-mm) centers.
You ground the router by connecting a grounding cable to earth ground and then attaching
it to the chassis grounding points by using two M5 Pan Head screws. You must provide
the grounding cables (the cable lugs are supplied with the router).
NOTE: The grounding lug required is a Panduit LCD10-10A-L or equivalent
(not provided). The grounding lug accommodates 14–10 AWG (2–5.3 mm²)
stranded wire. The grounding cable that you provide for the chassis must be
the same size or heavier than the input wire of each power supply. Minimum
recommendations are 14–10 AWG (2–5.3 mm²) stranded wire, 60° C wire,
or as permitted by local code.
To ground the MX204 router:
1. Verify that a licensed electrician has attached the cable lug provided with the router
to the grounding cable.
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the other end of the strap to an approved site ESD grounding point. See the instructions
for your site.
3. Ensure that all grounding surfaces are clean and brought to a bright finish before
grounding connections are made.
4. Connect the grounding cable to a proper earth ground.
5. Detach the ESD grounding strap from the site ESD grounding point.
6. Connect the grounding strap to one of the ESD points on the chassis.
Figure 4 on page 4 shows the ESD point on the router.
7. Place the grounding cable lug over the grounding point on the side of the chassis (see
Figure 12 on page 11).
Copyright © 2018, Juniper Networks, Inc.10
MX204 3D Universal Edge Router Quick Start

8. Secure the grounding cable lug with the screws. The holes are sized to accommodate
M5 Pan Head screws.
9. Dress the grounding cable and verify that it does not touch or block access to router
components, and that it does not drape where people could trip on it.
Figure 12: Grounding Point on the MX204 Router
Rear panel
g009882
1
1— Grounding point
Step 4: Connect External Devices and Cables
Figure 13 on page 11 shows the front panel of the MX204 router. All the connections to
the router are made through the front panel.
Figure 13: MX204 Front Panel Ports, LEDs, and Button
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15
8
1016
732 4 6
9
1 5
1314 1112
9—1— RESET button Rate-selectable ports
10—2— SSD0 LEDManagement (MGMT) port
11—3— Alarm (ALM) LEDBITS port with LEDs
12—4— OK/FAIL LED USB port
13—5— Time of day (ToD) port with LEDs1PPS and 10MHz GPS input and output
ports
14—6— Console (CON) portONLINE LED
15—7— 10-Gigabit Ethernet SFP+ ports
SSD1 LED
16—8— PTP grandmaster clock (GM/PTP) portOFFLINE button
•Connect the Router to a Network for Out-of-Band Management on page 12
•Connect the Router to a Console Device on page 12
•Connect the Router to External Clocking and Timing Devices on page 14
11Copyright © 2018, Juniper Networks, Inc.
Step 4: Connect External Devices and Cables

Connect the Router to a Network for Out-of-Band Management
To connect the router to a network for out-of-band management, connect an Ethernet
cable with RJ-45 connectors to the MGMT port on the router. One Ethernet cable is
provided with the router. To connect to the MGMT port on the router faceplate:
NOTE: Use shielded CAT5e cable for the CON and MGMT ports on the router.
1. Turn off power to the management device.
2. Plug one end of the Ethernet cable (Figure 14 on page 12 shows the connector) into
the MGMT port on the router.
3. Plug the other end of the cable into the network device.
Figure 14: Out-of-Band Management Cable Connector
Table 2: Out-of-Band Management Port on the MX204 Router
DescriptionLabelCallout
Dedicated management channel for
device maintenance. It is also used by
system administrators to monitor and
manage the router remotely.
MGMT2
(See Figure 13 on page 11)
Connect the Router to a Console Device
To use a system console to configure and manage the router, connect it to the appropriate
CON port on the router. The console port is used to connect a laptop or console terminal
to configure the router (see Figure 16 on page 13 and Figure 17 on page 13). The console
port accepts a cable with an RJ-45 connector. One serial cable with an RJ-45 connector
and a DB-9 connector is provided with the router.
NOTE: Use shielded CAT5e cable for connecting the CON and MGMT ports
on the router.
To connect a management console:
1. Turn off power to the console device.
Copyright © 2018, Juniper Networks, Inc.12
MX204 3D Universal Edge Router Quick Start

2. Plug the RJ-45 end of the serial cable (see Figure 15 on page 13) into the CON port on
the router.
3. Plug the female DB-9 end into the device's serial port.
NOTE:
For console devices, configure the serial port to the following values:
•Baud rate—9600
•Parity—N
•Data bits—8
•Stop bits—1
•Flow control—none
Figure 15: Console and Auxiliary Cable Connector
Figure 16: Connecting the MX204 Router to a Management Console
Through a Console Server
g020547
CON
To Console
port Console server PC
Figure 17: Connecting the MX204 Router Directly to a Management
Console
Table 3: Console Port on the MX204 Router
DescriptionLabelCallout
Connect a laptop or console terminal
to configure the router.
CON14
(See Figure 13 on page 11)
13Copyright © 2018, Juniper Networks, Inc.
Connect the Router to a Console Device

Connect the Router to External Clocking and Timing Devices
•Connect 1-PPS and 10-MHz Timing Devices to the Router on page 14
•Connect a Time-of-Day Device to the Router on page 14
•Connect a BITS External Clocking Device to the Router on page 15
Connect 1-PPS and 10-MHz Timing Devices to the Router
The router has four SubMiniature B (SMB) connectors that support 1-PPS and 10-MHz
timing devices.
NOTE: Ensure that a cable of 3 m or less in length is used for the 10-MHz and
1-PPS connectors.
To connect the SMB coaxial cable to the external clocking input port:
1. Connect one end of the SMB coaxial cable to either the 1-PPS SMB connector or the
10-MHz SMB connector on the router.
2. Connect the other end of the SMB coaxial cable to the 10-MHz or 1-PPS source network
equipment.
NOTE: Ensure that the 10-MHz or 1-PPS source network equipment
contains low voltage complementary metal oxide semiconductor
(LVCMOS) or is compatible with low-voltage (3.3 V) transistor–transistor
logic (LVTTL).
Table 4: Clocking Port on the MX204 Router
DescriptionLabelCallout
GPS input and output ports.10MHz
1PPS
5
(See Figure 13 on page 11)
Connect a Time-of-Day Device to the Router
A time-of-day port—labeled ToD—on the front panel of the router enables you to connect
external timing devices.
To connect the router to a ToD external timing device:
1. Attach an electrostatic discharge (ESD) grounding trap on your bare wrist, and connect
the strap to one of the ESD points on the chassis.
2. Plug one end of the RJ-45 cable into the ToD port on the front panel of the router.
Copyright © 2018, Juniper Networks, Inc.14
MX204 3D Universal Edge Router Quick Start

3. Plug the other end of the RJ-45 cable into the ToD timing device.
4. Verify that the LEDs for the ToD port on the router are lit steadily green.
5. Configure the port. See Configuring Clock Synchronization Interface on MX Series Routers.
Table 5: Time-of-Day Port on the MX204 Router
DescriptionLabelCallout
ToD RJ-45 port with LED.ToD13
(See Figure 13 on page 11)
Connect a BITS External Clocking Device to the Router
The router has an external building-integrated timing supply (BITS) port—labeled BITS—on
the front panel of the router.
To connect the router to a BITS external clocking device:
1. Attach an electrostatic discharge (ESD) grounding trap on your bare wrist, and connect
the strap to one of the ESD points on the chassis.
2. Plug one end of the RJ-45 cable into the internal clock port on the router.
3. Plug the other end of the RJ-45 cable into the BITS external clocking device.
4. Verify that the LEDs for the BITS port are lit steadily green.
5. Configure the port. See Configuring Clock Synchronization Interface on MX Series Routers.
Table 6: BITS Port on the MX204 Router
DescriptionLabelCallout
BITS clock interface port with LED.BITS3
(See Figure 13 on page 11)
Step 5: Connect Power Cables
Depending on the configuration, your router uses either AC or DC power supplies. Perform
the appropriate procedures for each power supply in your router. The power supplies are
hot-insertable and are field-replaceable units (FRUs). MX204 supports two power supply
modules. The power supplies install in the rear of the chassis in the slots provided.
15Copyright © 2018, Juniper Networks, Inc.
Connect a BITS External Clocking Device to the Router

WARNING: You must ground the router before connecting either the AC
power cord or the DC power cable.
CAUTION: Do not mix AC and DC power supplies in the same chassis.
•Connect Power to an AC Router on page 16
•Connect Power to a DC Router on page 17
Connect Power to an AC Router
Table 7: MX204 AC Power System Input Voltage
SpecificationItem
Operating range: 90–264 VACAC input voltage
1. Locate power cords that have a plug appropriate for your geographical location.
2. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the
ESD points on the chassis.
3. Connect the power cord to the power supply.
4. Insert the power cord plug into an external AC power source receptacle.
NOTE: Each power supply must be connected to a dedicated AC power
feed and a dedicated customer-site circuit breaker. We recommend that
you use a dedicated customer-site circuit breaker rated for either
20 A (110 VAC) minimum or 16 A (220 VAC) minimum, or as required by
local code.
5. Push the end of the AC power cord retainer strip into the hole next to the inlet on the
power supply faceplate until it snaps into place. Ensure that the loop in the retainer
strip faces toward the power cord.
6. Press the small tab on the retainer strip to loosen the loop. Slide the loop until you
have enough space to insert the power cord coupler into the inlet.
7. Insert the power cord coupler firmly into the inlet.
8. Slide the loop toward the power supply until it is snug against the base of the coupler.
Copyright © 2018, Juniper Networks, Inc.16
MX204 3D Universal Edge Router Quick Start

9. Press the tab on the loop and draw out the loop into a tight circle (see
Figure 18 on page 17).
10. Dress the power cord appropriately. Verify that the power cord does not block the air
exhaust and access to router components, or drape where people could trip on it.
11. Repeat Step 1through Step 10 for the remaining power supply.
12. Power on the power supply at source. Observe the power status LED on the router. If
an AC power supply is installed correctly and functioning normally, the status LED
lights green steadily.
If the status LED indicates that the power supply is not functioning normally, repeat
the installation and cabling procedures.
Figure 18: Connecting an AC Power Cord to an MX204 AC Power Supply
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Connect Power to a DC Router
Table 8: MX204 DC Power System Input Voltage
SpecificationItem
Operating range: –44 through –72 VDCDC input voltage
1. Switch off the dedicated customer-site circuit breakers. Ensure that the voltage across
the DC power source cable leads is 0 V and that there is no chance that the cable
leads might become active during installation.
2. Remove the clear plastic cover protecting the terminal on the faceplate.
3. Verify that the DC power cables are correctly labeled before making connections to
the power supply. In a typical power distribution scheme where the return is connected
to chassis ground at the battery plant, you can use a multimeter to verify the resistance
of the –48V and RTN DC cables to chassis ground:
•The cable with very large resistance (indicating an open circuit) to chassis ground
is –48V.
17Copyright © 2018, Juniper Networks, Inc.
Connect Power to a DC Router

•The cable with very low resistance (indicating a closed circuit) to chassis ground is
RTN.
4. Remove the screws from the terminals.
5. Secure each power cable lug to the terminal with the screw (see Figure 19 on page 19).
Apply between 5 lb-in. (0.6 Nm) and 6 lb-in. (0.7 Nm) of torque to the screw. Do not
overtighten the nut. (Use a number Phillips 2 screwdriver.)
a. Secure the positive (+) DC source power cable lug to the RTN (return) terminal.
b. Secure the negative (–) DC source power cable lug to the –48V (input) terminal.
NOTE: The DC power source cables required is 14–16 AWG with ring lug
(Molex 190700069 or equivalent) (not provided).
CAUTION: Ensure that each power cable lug seats flush against the surface
of the terminal block as you are tightening the screws. Ensure that each
screw is properly threaded into the terminal. Applying installation torque
to the screw when improperly threaded might result in damage to the
terminal.
CAUTION: The maximum torque rating of the terminal screws on the DC
power supply is 6 lb-in. (0.7 Nm). The terminal screws might be damaged
if excessive torque is applied. Use only a torque-controlled driver to tighten
screws on the DC power supply terminals. Use an appropriately sized
driver, with a maximum torque capacity of 6 lb-in. or less. Ensure that the
driver is undamaged and properly calibrated and that you have been
trained in its use. You might want to use a driver that is designed to prevent
overtorque when the preset torque level is achieved.
6. Replace the clear plastic cover over the terminals on the faceplate.
7. Repeat Step 3through Step 5for the remaining power supply.
8. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to an approved site ESD grounding point. See the instructions for your site.
9. Connect each DC power cable to the appropriate external DC power source.
NOTE: For information about connecting to external DC power sources,
see the instructions for your site.
Copyright © 2018, Juniper Networks, Inc.18
MX204 3D Universal Edge Router Quick Start

10. Switch on the external circuit breakers to provide voltage to the DC power source
cable leads.
11. Power on the power supply at source. Observe the power status LED on the router. If
a DC power supply is installed correctly and functioning normally, the status LED lights
green steadily.
If the status LED indicates that the power supply is not functioning normally, repeat
the installation and cabling procedures.
Figure 19: Connecting a DC Power Cable to an MX204 DC Power Supply
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Step 6: Perform Initial Software Configuration
This procedure connects the router to the network but does not enable it to forward
traffic. For complete information about configuring the router to forward traffic, including
examples, see the Junos OS configuration guides.
To configure the software:
•Enter Configuration Mode on page 19
•Configure User Accounts and Passwords on page 20
•Configure System Attributes on page 20
•Commit the Configuration on page 21
Enter Configuration Mode
1. Verify that the router is powered on.
2. Log in as the root user. There is no password.
3. Start the CLI.
root# cli
root@host>
4. Enter configuration mode.
root@host> configure
[edit]
root@host#
19Copyright © 2018, Juniper Networks, Inc.
Step 6: Perform Initial Software Configuration

Configure User Accounts and Passwords
For information about using an encrypted password or an SSH public key string (DSA or
RSA), see Configuring the Root Password and authentication (Login) in the User Access
and Authentication Feature Guide for Routing Devices.
1. Add a password to the root administration user account. Enter a cleartext password.
[edit]
root@host# set system root-authentication plain-text-password
New password: password
Retype new password: password
2. Create a management console user account.
[edit]
root@host# set system login user user-name authentication plain-text-password
New Password: password
Retype new password: password
3. Set the user account class to super-user.
[edit]
root@host# set system login user user-name class super-user
Configure System Attributes
1. Configure the name of the router. If the name includes spaces, enclose the name in
quotation marks (“ ”).
[edit]
root@host# set system host-name host-name
2. Configure the router’s domain name.
[edit]
root@host# set system domain-name domain-name
3. Configure the IP address and prefix length for the router’s Ethernet interface.
[edit]
root@host# set interfaces fxp0 unit 0 family inet address address/prefix-length
4. Configure the IP address of a backup router, which is used only while the routing
protocol is not running.
[edit]
root@host# set system backup-router address
5. Configure the IP address of a DNS server.
[edit]
root@host# set system name-server address
Copyright © 2018, Juniper Networks, Inc.20
MX204 3D Universal Edge Router Quick Start