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MX301 Chassis

Learn about the components in the MX301 chassis.

The MX301 chassis is a rigid sheet-metal structure that houses all components of the device.

MX301 Specifications

Table 1: Physical Specifications
Specification Value

Height

1.75 in. (4.45 cm)

Width

17.28 in. (44 cm)

Depth

17.71 in. (45 cm)

Weight

As shipped: 34.81 lb (15.79 kg)

Fully-loaded:

  • With AC PSU: 25.53 lb (11.58 kg)

  • With DC PSU: 25.33 lb (11.49 kg)

  • With HVAC/DC PSU: 25.45 lb (11.54 kg)
Table 2: Environmental Specifications
Specification Value

Operating altitude

0 ft to 6000 ft (0 m to 1829 m)

Operating temperature

With 100G optics and below:

  • Telco NEBS environment short term GR 63—0 °C to 55 °C up to 6000 ft  (32 °F to 131 °F up to 1829 m)

  • Above 6000 ft up to 16000 ft (1829 m up to 4877 m), the device will experience an ambient temperature degradation of 1 °C per 1000 ft (33.8 °F per 304.8 m). For example:

    • 0 °C to 54 °C at 7000 ft (32 °F to 129.2 °F at 2133.6 m)

    • 0 °C to 45 °C  at 16000 ft (32 °F to 113 °F at 4877 m)

With 400G optics:

  • DC NEBS environment—0 °C to 40 °C up to 6000 ft (32 °F to 104 °F up to 1829 m)

  • Above 6000 ft up to 16000 ft (1829 m up to 4877 m), the device will experience an ambient temperature degradation of 1 °C per 1000 ft (33.8 °F per 304.8 m). For example:

    • 0 °C to 39 °C at 7000 ft (32 °F to 102.2 °F at 2133.6 m)

    • 0 °C to 30 °C at 16000 ft (32 °F to 86 °F at 4877 m)

Storage temperature

-40 °C to 70 °C (-40 °F to 158 °F)

Relative humidity (operating) (noncondensing)

5% to 90%

Relative humidity (nonoperating) (noncondensing)

5% to 90%

Seismic tolerance

 Designed to meet Telcordia Technologies Zone 4 earthquake requirements.

Average Thermal Output

300 W x 3.412 = 1024 BTU/hour

Acoustic noise level

Typical: 58 through 67 dBA

MX301 Front Panel

Figure 1: MX301 Front Panel Components MX301 Front Panel Components
Table 3: Components on the MX301 Front Panel
Callout Item Description

1

ESD point

Electrostatic discharge (ESD) point.

2

WAN port LEDs

26 LEDs (labeled 0–25) to indicate the status of each of the 26 network ports.

3

1PPS and 10 MHz GPS input and output ports

1-PPS and 10-MHz input and output external clocking ports with DIN connectors.

4

Lane LEDs

Eight LEDs (labeled L0–L7) to indicate the lane position.

5

QSFP ports

10 QSFP form factor ports where:

  • Four QSFP56-DD ports support up to 400GbE speeds

  • Six QSFP28 ports support up to 100GbE speeds

6

SFP ports

16 SFP form factor ports support up to 50GbE speeds.

7

Claim code

Use the QR code to claim and onboard your device to Juniper control points.

8

Time of day (TOD) port

Ensures precise time synchronization by connecting to external timing sources.

9

CONSOLE port

Enables you to connect a laptop directly to the MX301 console port and manage the device using the CLI. The port uses an RJ-45 serial connection.

10

Management port (MGMT)

Enables you to connect the MX301 to a management network and perform out-of-band management remotely. The management port uses an autosensing RJ-45 Ethernet connector (supports 10-Mbps, 100-Mbps, and 1000-Mbps port speeds).

11

USB port

A USB 3.0 Type A port for plugging in USB storage devices to install Junos OS manually.

12

Chassis LEDs

Eight LEDs to indicate component status, system status, and troubleshooting information at a glance.

13

RESET push button

To reset the device, briefly press the RESET push button.

To enter BIOS reset mode, press and hold the RESET push button for approximately 10 seconds.

14

ON/OFF push button

To take the device offline, press the ON/OFF push button for approximately 4 seconds.

To bring the device online, press the ON/OFF push button momentarily.

MX301 Rear Panel

Figure 2: MX301 Rear Panel Components (AC Variant) MX301 Rear Panel Components (AC Variant)
Table 4: Components on the MX301 Rear Panel (AC Variant)
Callout Item Description

1

Grounding point

Enables you to connect a grounding cable to earth ground and attach it to the MX301 grounding point to ground the device.

2

Fan modules

Six airflow out (AFO) fan modules (5+1 redundancy)

3

AC PSU

Two 850-W AC PSUs (1+1 redundancy)
Figure 3: MX301 Rear Panel Components (DC Variant) MX301 Rear Panel Components (DC Variant)
Table 5: Components on the MX301 Rear Panel (DC Variant)
Callout Item Description

1

Grounding point

Enables you to connect a grounding cable to earth ground and attach it to the MX301 grounding point to ground the device.

2

Fan modules

Six airflow out (AFO) fan modules (5+1 redundancy)

3

DC PSUs

Two 850-W DC PSUs (1+1 redundancy)
Figure 4: MX301 Rear Panel Components (HVAC/DC Variant) MX301 Rear Panel Components (HVAC/DC Variant)
Table 6: Components on the MX301 Rear Panel (HVAC/DC Variant)
Callout Item Description

1

Grounding point

Enables you to connect a grounding cable to earth ground and attach it to the MX301 grounding point to ground the device.

2

Fan modules

Six airflow out (AFO) fan modules (5+1 redundancy)

3

HVAC/DC PSUs

Two 850-W high voltage AC/DC PSUs (1+1 redundancy)