Juniper MX204 Manuale utente

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

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.

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.

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.

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/).

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.

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.

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.

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