Juniper MX204 User manual

MX204 Universal Roung Plaorm
Published
2023-10-04
RELEASE

Table of Contents
MX204 Quick Start Descripon
Step 1: Prepare the Site for MX204 Installaon
MX204 Router Rack Requirements | 3
Router Clearance Requirements | 6
Router Cooling and Airow Requirements | 7
Tools Required to Prepare the MX204 Router for Installaon | 8
Step 2: Install the MX204 Chassis in the Rack
Step 3: Connect the Grounding Cable
Step 4: Connect External Devices and Cables
Connect the Router to a Network for Out-of-Band Management | 13
Connect the Router to a Console Device | 14
Connect the Router to External Clocking and Timing Devices | 16
Connect 1-PPS and 10-MHz Timing Devices to the Router | 16
Connect a Time-of-Day Device to the Router | 17
Connect a BITS External Clocking Device to the Router | 17
Step 5: Connect Power Cables
Connect Power to an AC Router | 19
Connect Power to a DC Router | 20
Step 6: Perform Inial Soware Conguraon
Enter Conguraon Mode | 22
Congure User Accounts and Passwords | 23
Congure System Aributes | 24
Commit the Conguraon | 25
ii

Safety Warnings
iii

MX204 Quick Start Descripon
This Quick Start contains informaon you need to install and congure the router quickly. For complete
installaon instrucons, see the MX204 Universal Roung Plaorm Hardware Guide at hps://
www.juniper.net/documentaon/.
WARNING: This Quick Start contains a summary of safety warnings in "Safety
Warnings" on page 26. For a complete list of warnings for this router, including
translaons, see the MX204 Universal Roung Plaorm Hardware Guide at hps://
www.juniper.net/documentaon/.
The Juniper Networks MX204 Universal Roung Plaorm is an Ethernet-opmized edge router with
400-Gbps capacity that provides both switching and carrier-class Ethernet roung. The MX204 router
runs Junos operang system (Junos OS), enabling a wide range of business and residenal applicaons
and services, including high-speed transport and virtual private network (VPN) services, next-generaon
broadband mulplay 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, buering, and
queuing.
The MX204 router is compact and one rack unit (1 U) tall. Several routers can be stacked in a single
oor-to-ceiling rack for increased port density per unit of oor space.
The MX204 router is a xed-conguraon router, and supports one built-in Roung 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 congured as 100-Gigabit Ethernet ports or 40-
Gigabit Ethernet ports, or each port can be congured 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 2 shows the front of the MX204 router.
1

Figure 1: Front View of the MX204 Router
Figure 2 on page 2 and Figure 3 on page 2 shows the rear of the fully congured routers.
Figure 2: Rear View of the AC-Powered MX204 Router
1—Fan modules 2—Power supply modules (AC)
Figure 3: Rear View of the DC-Powered MX204 Router
1—Fan modules 2—Power supply modules (DC)
The electrostac discharge (ESD) points on the router are located both on the front and on the rear of
the chassis. Figure 4 on page 3 shows the electrostac discharge (ESD) point on the router.
CAUTION: Before removing or installing components, aach an ESD strap to an ESD
point, and aach the other end of the strap to your bare wrist. Failure to use an ESD
strap can result in damage to the hardware components.
2

Figure 4: ESD Points on the MX204 Router
1—ESD point
Step 1: Prepare the Site for MX204 Installaon
IN THIS SECTION
MX204 Router Rack Requirements | 3
Router Clearance Requirements | 6
Router Cooling and Airow Requirements | 7
Tools Required to Prepare the MX204 Router for Installaon | 8
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 4 summarizes rack
requirements and specicaons for the router.
3

Table 1: Rack Requirements and Specicaons for an MX204 Router
Rack Requirement Guidelines
Rack type and mounng bracket
hole spacing
Use a four-post rack. You can mount the router on any four-post rack that
provides bracket holes or hole paerns spaced at 1 U (1.75-in./4.44-cm)
increments and that meets the size and strength requirements specied in
this table.
A U is the standard rack unit dened in Cabinets, Racks, Panels, and
Associated Equipment (document number EIA-310–D) published by the
Electronics Components Industry Associaon (hp://www.ecianow.org/).
4

Table 1: Rack Requirements and Specicaons for an MX204 Router (Connued)
Rack Requirement Guidelines
Rack size and strength •Ensure that the rack is 19-in. wide as dened in
Cabinets, Racks, Panels,
and Associated Equipment (document number EIA-310–D) published by
the Electronics Components Industry Associaon (hp://
www.ecianow.org/).
•Ensure that the rack is of one of the following standard depths:
•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 No Link Title). The outer edges of the
mounng 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-mounng brackets xed in the front-
mount posion on the chassis. You can move the rear-mounng
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
congured router, up to 22.7 lb (10.3 kg).
•Either end of the router must be mounted ush with the rack and sll be
adjustable for racks with dierent 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.
5

Table 1: Rack Requirements and Specicaons for an MX204 Router (Connued)
Rack Requirement Guidelines
Rack connecon to the building
structure
•Secure the rack to the building structure.
•If earthquakes are a possibility in your geographic area, secure the rack
to the oor.
•Secure the rack to the ceiling brackets as well as wall or oor brackets
for maximum stability.
SEE ALSO
No Link Title
Router Clearance Requirements
For the cooling system to funcon properly, the airow around the chassis must be unrestricted. You
must allow sucient clearance around the installed chassis for cooling and maintenance.
If you are mounng 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 7.
6

Figure 5: Clearance Requirements for Airow and Hardware Maintenance for the MX204
Router Cooling and Airow Requirements
• The router has front-to-back or airow 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 funcon properly, the airow 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 8.
7