Quick Start Guide QFX5120 Switch Quick Start · • ForthevariantsQFX5120-48Y-DC-AFO2,QFX5120-48Y-DC-AFI2,QFX5120-48T-DC-AFO,andQFX5120-48T-DC-AFI poweredbyaDCpowersupply—14

Quick Start GuideQFX5120 Switch Quick Start

IN THIS GUIDE

System Overview | 1

Tools and Parts Required for Installation | 3

Step 1: Unpack the QFX5120 Switch | 4

Step 2: Mount the QFX5120 Switch | 5

Step 3: Connect the QFX5120 Switch to Earth Ground | 10

Step 4: Connect Power to the Switch | 11

Step 5: Perform Initial Configuration | 18

Safety Warnings Summary | 20

Contacting Juniper Networks | 21

System Overview

Featuring Layer 3 gateway capabilities for routing between virtualized and bare-metal servers, the QFX5120 is designedfor extremely agile data centers that demand support for overlay and underlay network architectures.

The QFX5120 switches are available in three models—QFX5120-32C, QFX5120-48Y, and QFX5120-48T. Each model isavailable in two variants featuring AC power supplies with front-to-back or back-to-front airflow and two variants featuringDC power supplies with front-to-back or back-to-front airflow.

QFX5120-32C switches offer 32 100GbE ports that support quad small form-factor pluggable 28 (QSFP28) transceiversand 2 10GbE ports that support small form-factor pluggable plus (SFP+) transceivers. Junos OS Release 19.1R1 is the firstJunos OS release that supports QFX5120-32C switches.

QFX5120-48Y switches offer 48 25GbE SFP (SFP28) ports and 8 100GbE QSFP (QSFP28) ports. You can operate eachSFP28 port as a 25GbE, 10GbE, or 1GbE port by using the appropriate transceivers. You can operate each QSFP28 port

as a 100GbE or 40GbE port by using the appropriate transceivers. Junos OS Release 18.3R1 is the first Junos OS releasethat supports QFX5120-48Y switches.

QFX5120-48T switches offer 6 100GbE QSFP28 ports and 48 10GbE BASE-T ports. The six QSFP28 ports can operateat 100-Gbps speed (with QSFP28 transceivers) or 40-Gbps speed (with QSFP+ transceivers). Junos OS Release 20.2R1is the first Junos OS release that supports QFX5120-48T switches.

You can channelize the QSFP28 ports and connect breakout cables.

NOTE: See the complete documentation at https://www.juniper.net/documentation/product/en_US/qfx5120.

You canmount aQFX5120 switch on four posts of a 19-in. rack or a 19-in. cabinet by using a rackmount kit. (The remainderof this topic uses rack to mean rack or cabinet). You can mount a QFX5120-48T or QFX5120-48Y switch flush with thefront posts of a rack or cabinet or in a recessed position inside the rack. This guide describes the procedure to mount aswitch flush with the front posts of a rack.

You can power aQFX5120 switch by using a 650-WACpower supply, a 650-WDCpower supply, or a 850-Whigh–voltagepower supply with AC or DC input. This guide describes the procedure to power the switch by using a 650-W AC or DCpower supply.

NOTE: To ensure that the protective earthing terminal is accessible, ensure that the rack is 27.5 in. (70 cm)through 30.5 in. (77.5 cm) deep if you are mounting the switch flush with the rack front on four posts of a rack.

Before mounting a QFX5120 switch:

• Verify that the site meets the requirements described in Site Preparation Checklist for QFX5120 Switches.

• Place the rack in its permanent location, allowing adequate clearance for airflow and maintenance, and secure the rackto the building structure.

• Read General Safety Guidelines and Warnings, with particular attention to Chassis and Component Lifting Guidelines.

• Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Preventionof Electrostatic Discharge Damage).

NOTE: One person must be available to lift the switch while another person secures the switch to the rack.

CAUTION: If you are mounting multiple units on a rack, mount the heaviest unit at the bottom of therack, and then mount the other units from the bottom of the rack to the top in decreasing order ofthe weight of the units.

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https://www.juniper.net/documentation/product/en_US/qfx5120

Tools and Parts Required for Installation

Ensure that you have the following parts and tools available:

• Number 2 Phillips (+) screwdriver—not provided

• Electrostatic discharge (ESD) grounding strap—not provided

• Screws to secure the mounting brackets to the rack—not provided

To mount a QFX5120-32C switch on a rack, you need:

• Front mounting brackets—2 (provided with the rack mount kit)

• Side mounting rails—2 (provided with the rack mount kit)

• Flat headM4X8 screws to attach the front mounting brackets and sidemounting rails to the switch chassis—20 (providedwith the rack mount kit)

• Rear mounting (L-shaped) brackets—2 (provided with the rack mount kit)

• Pan headM4X8 screws to attach the rear mounting brackets to the sidemounting rails—2 (providedwith the rackmountkit)

To mount a QFX5120-48Y or QFX5120-48T switch on a rack, you need:

• Front mounting bracket assembly for mounting the switch flush with the front posts of a rack—2 (provided with therack mount kit)

The front mounting bracket assembly is made up of a side rail to which an L-shaped bracket is attached.

• Flat head 4x6-mm Phillips screws for attaching the front mounting brackets to the chassis—12 (provided with the rackmount kit)

• Rear mounting brackets—2 (provided with the rack mount kit)

To connect the QFX5120-32C switch to earth ground, you need:

• A grounding cable (minimum 12 AWG (1.5 mm²), minimum 90° wire, or as permitted by the local code), a grounding lug(4.3-mm circular lug), and one 8-mm screw—not provided

To connect the QFX5120-48Y or QFX5120-48T switch to earth ground, you need:

• A grounding cable (minimum 14 AWG (2.5 mm²), minimum 90° C wire, or as permitted by the local code), a groundinglug (Panduit LCD10-10A-L or equivalent), and a pair of 10-32 x .25 in. screws with #10 split-lock washers—not provided

To connect power to the switch, you need:

• For the variantsQFX5120-32C-AFO,QFX5120-32C-AFI,QFX5120-48Y-AFO2,QFX5120-48Y-AFI2,QFX5120-48T-AFO,andQFX5120-48T-AFI powered by anACpower supply—AnACpower cordwith a plug appropriate for your geographicallocation, and a power cord retainer—provided.

• For the variants QFX5120-32C-DC-AFO andQFX5120-32C-DC-AFOpowered by aDC power supply—DCpower cablewith a plug—provided

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• For the variantsQFX5120-48Y-DC-AFO2,QFX5120-48Y-DC-AFI2,QFX5120-48T-DC-AFO, andQFX5120-48T-DC-AFIpowered by a DC power supply—14–16 AWG DC power source cables with Molex 190700069 or equivalent ring lugsattached—not provided

To perform initial configuration of the switch, you need:

• An Ethernet cable with an RJ-45 connector attached—provided

• An RJ-45 to DB-9 serial port adapter—provided

• A management host, such as a PC, with an Ethernet port—not provided

Register product serial numbers on the Juniper Networks website and update the installation base data if there is anyaddition or change to the installation base or if the installation base is moved. Juniper Networks will not be held accountablefor not meeting the hardware replacement service-level agreement for products that do not have registered serial numbersor accurate installation base data.

Register your product at https://tools.juniper.net/svcreg/SRegSerialNum.jsp.

Update your installation base at https://www.juniper.net/customers/csc/management/updateinstallbase.jsp.

Step 1: Unpack the QFX5120 Switch

We ship QFX5120 switches in a cardboard carton, secured with foam packing material.

CAUTION: QFX5120 switches are maximally protected inside the shipping carton. Do not unpackthe switches until you are ready to begin installation.

To unpack the switch:

1. Move the shipping carton to a staging area as close to the installation site as possible, but where you have enoughroom to remove the system components.

2. Position the carton so that the arrows marked on the carton are pointing up.

3. Open the top flaps on the shipping carton.

4. Pull out the packing material holding the switch in place.

5. Verify the parts received against the inventory on the label attached to the carton.

6. Save the shipping carton and packing materials in case you need to move or ship the switch later.

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https://tools.juniper.net/svcreg/SRegSerialNum.jsp

https://www.juniper.net/customers/csc/management/updateinstallbase.jsp

Step 2: Mount the QFX5120 Switch

IN THIS SECTION

Mount the QFX5120-32C Switch on Four Posts of a Rack or Cabinet | 5

Mount the QFX5120-48Y or QFX5120-48T Switch Flush with the Front Posts of a Rack or Cabinet | 7

You can mount a QFX5120 switch on four posts of a 19-in. rack or a 19-in. cabinet by using a rack mount kit. You canmount a QFX5120-48Y or QFX5120-48T switch flush with the front posts of a rack or cabinet or in a recessed positioninside the rack. This guide describes the procedure to mount a switch flush with the front posts of a rack.

Mount the QFX5120-32C Switch on Four Posts of a Rack or Cabinet

CAUTION: If you are mounting multiple units on a rack, mount the heaviest unit at the bottom of therack, and then mount the other units from the bottom of the rack to the top in decreasing order ofthe weight of the units.

To mount the QFX5120-32C switch:

1. Place the switch on a flat, stable surface.

2. Align the front mounting brackets along the side panel of the switch such that the front of the bracket is flush withthe front panel of the switch chassis. Insert the flat head M4X8 screws for attaching the front mounting brackets intothe aligned holes on the chassis and tighten the screws (see Figure 1).

Figure 1: Attach the Front Mounting Brackets to a QFX5120-32C Switch Chassis

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3. Align the side mounting rails along the side panel of the switch. Insert the flat head M4X8 screws for attaching theside mounting rails into the aligned holes on the chassis and tighten the screws (see Figure 2).

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Figure 2: Attach the Side Mounting Rails to a QFX5120-32C Switch Chassis

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4. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to asite ESD point.

5. Have one person grasp both sides of the switch, lift the switch, and position it in the rack, aligning the holes of themounting brackets with the threaded holes in the front post of the rack. Align the bottom hole in both the mountingbrackets with a hole in each rack rail, making sure that the chassis is level.

6. Have a second person secure the front of the switch to the rack by using the screws appropriate for your rack. Tightenthe screws (see Figure 3).

Figure 3: Secure the QFX5120-32C Switch to the Front Posts of a Rack

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7. Slide the rear mounting (L-shaped) brackets on to the side mounting rails.

8. Ensure that the chassis is level. Align the holes of the rear mounting brackets with the threaded holes in the rear postof the rack. Align the bottom hole in both the mounting brackets with a hole in each rack rail. Align the bottom holein both the rear mounting brackets with the bottom hole in the front mounting brackets.

9. Secure the rear mounting brackets to the rear post of the rack by using screws appropriate for your rack (see Figure 4).Tighten the screws.

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Figure 4: Secure the QFX5120-32C Switch to the Rear Post of the Rack by Using the Rear Mounting Brackets

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10. Secure the rear mounting (L-shaped) brackets to the side mounting rails by using the pan head M4X8 screws provided(see Figure 4). Tighten the screws.

NOTE: We recommend that you install covers in all unused power supply slots.

Mount the QFX5120-48Y or QFX5120-48T Switch Flush with the Front Posts of aRack or Cabinet

You can mount QFX5120-48Y and QFX5120-48T switches flush with the front posts of a rack or cabinet or in a recessedposition inside the rack. This guide describes the procedure to mount QFX5120-48Y and QFX5120-48T switches flushwith the front posts of a rack. If you want to mount the switch in a recessed position from the front posts of a rack orcabinet, seeMount a QFX5120-48Y or QFX5120-48T Switch in a Recessed Position From the Front Posts of a Rack or Cabinet.

To mount the QFX5120-48Y or QFX5120-48T switch:

1. Place the switch on a flat, stable surface.

2. Align the front mounting bracket assembly (provided with the rack mount kit) along the side panel of the switch suchthat the front of the bracket is flush with the front panel of the switch chassis.

3. Insert the flat head 4x6-mm Phillips screws for attaching the front mounting brackets (provided with the rack mountkit) into the aligned holes on the chassis (see Figure 5 and Figure 6). Tighten the screws.

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Figure 5: Attach the Flush Front Mounting Brackets to a QFX5120-48Y Switch Chassis

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Figure 6: Attach the Flush Front Mounting Brackets to a QFX5120-48T Switch Chassis

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5. Have one person grasp both sides of the switch, lift the switch, and position it in the rack, aligning the holes of themounting brackets with the threaded holes in the front post of the rack. Align the bottom hole in both the mountingbrackets with a hole in each rack rail, making sure that the chassis is level.

6. Have a second person secure the front of the switch to the rack by using the screws appropriate for your rack. Tightenthe screws (see Figure 7 and Figure 8).

Figure 7: Secure the QFX5120-48Y Switch to the Front Posts of a Rack

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Figure 8: Secure the QFX5120-48T Switch to the Front Posts of a Rack

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7. Slide the rear mounting bracket blades into the side rails of the front mounting brackets attached to the switch chassis(see Figure 9 and Figure 10).

8. Ensure that the chassis is level. Align the holes of the rear mounting brackets with the threaded holes in the rear postof the rack. Align the bottom hole in both the mounting brackets with a hole in each rack rail. Align the bottom holein both the rear mounting brackets with the bottom hole in the front mounting brackets.

9. Secure the rear mounting brackets to the rear post of the rack by using screws appropriate for your rack (see Figure 9and Figure 10).

Figure 9: Secure the QFX5120-48Y Switch to the Rear Post of the Rack by Using the Rear Mounting Bracketsg0

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Figure 10: Secure the QFX5120-48T Switch to the Rear Post of the Rack by Using the Rear Mounting Brackets

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NOTE: We recommend that you install covers in all unused power supply slots.

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Step 3: Connect the QFX5120 Switch to Earth Ground

To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you must connectthe switch to earth ground before you connect power to the switch. You must use the protective earthing terminal onthe switch chassis to connect the switch to ground.

NOTE: A ground connection to the protective earthing terminal is not required for an AC-powered switch. TheAC power cords provide adequate grounding when you connect the power supply in the switch to a groundedAC power outlet by using the AC power cord appropriate for your geographical location.

WARNING: The switch is installed in a restricted-access location.

CAUTION: If an external ground connection is required, ensure that a licensed electrician has attachedan appropriate grounding lug to the grounding cable that you supply. Using a grounding cable with anincorrectly attached lug can damage the switch.

To ground the QFX5120:

1. Connect one end of the grounding cable to a proper earth ground, such as the rack in which the switch is mounted.

2. Place the grounding lug attached to the grounding cable over the protective earthing terminal (see Figure 11 andFigure 12). The protective earthing terminal is on the rear panel on a QFX5120-32C switch and on the left panel on aQFX5120-48Y switch and a QFX5120-48T switch.

Figure 11: Connect a Grounding Cable to a QFX5120-32C Switch

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Figure 12: Connect a Grounding Cable to a QFX5120-48Y or QFX5120-48T Switch

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3. Secure the grounding lug to the protective earthing terminal with the washers and screws.

4. Dress the grounding cable and ensure that it does not touch or block access to other switch components.

WARNING: Ensure that the cable does not drape where people could trip over it.

Step 4: Connect Power to the Switch

IN THIS SECTION

Connect Power to an AC-Powered QFX5120 Switch | 12

Connect Power to a DC-Powered QFX5120-32C Switch | 14

Connect Power to a DC-powered QFX5120-48Y or QFX5120-48T Switch | 15

We ship the QFX5120 switches with two AC or DC power supplies preinstalled. Each power supply is a hot-removableand hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running: You can installpower supplies in the slots next to the fan modules without powering off the switch or disrupting switch functions.

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Before you begin connecting power to the switch:

• Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Preventionof Electrostatic Discharge Damage).

• Ensure that you have connected the switch chassis to earth ground.

CAUTION: Before you connect power to the switch, a licensed electrician must attach a cable lugto the grounding and power cables that you supply. A cable with an incorrectly attached lug candamage the switch (for example, by causing a short circuit).

Tomeet safety and electromagnetic interference (EMI) requirements and to ensure proper operation,you must connect the chassis to earth ground before you connect it to power. For installations thatrequire a separate grounding conductor to the chassis, use the protective earthing terminal on theswitch chassis to connect to earth ground. The switch gains additional grounding when you plugthe power supply in the switch into a grounded AC power outlet by using the AC power cordappropriate for your geographical location.

Connect Power to an AC-Powered QFX5120 Switch

To connect power to an AC-powered QFX5120 switch:


2. Ensure that the power supplies are fully inserted in the chassis and the latches are secure. If only one power supply isinstalled, ensure that a cover is installed over the second power supply slot.

3. Locate the power cord or cords shipped with the switch; the cords have plugs appropriate for your geographicallocation.

WARNING: Ensure that the power cord does not block access to device components or drapewhere people can trip on it.

4. Push the end of the retainer strip into the hole next to the inlet on the power supply face plate until it snaps into place.Ensure that the loop in the retainer strip faces the power cord.

5. Press the small tab on the retainer strip to loosen the loop. Slide the loop until you have enough space to insert thepower cord coupler into the inlet.

6. Insert the power cord coupler firmly into the inlet.

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7. Slide the loop toward the power supply until it is snug against the base of the coupler.

8. Press the tab on the loop and draw out the loop into a tight circle (see Figure 13 and Figure 14).

Figure 13: Connect Power to an AC-Powered QFX5120-32C Switch

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Figure 14: Connect Power to an AC-Powered QFX5120-48Y or QFX5120-48T Switch

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9. If the AC power source outlet has a power switch, set it to the off position.

NOTE: The switch powers on as soon as power is provided to the power supply. There is no power switchon the QFX5120.

10. Insert the power cord plug into an AC power source outlet.

11. If the AC power source outlet has a power switch, set it to the on position.

12. If you are connecting the power supply in a QFX5120-32C switch, verify that the LED on the power supply is litgreen. If the LED is lit red or blinking red, disconnect the power supply from the power source, and replace the powersupply (see Remove a Power Supply from a QFX5120 Switch).

•

• If you are connecting the power supply in a QFX5120-48Y or QFX5120-48T switch, verify that theAC andDC LEDson the power supply are lit green. If the fault LED (!) is lit, disconnect the power supply from the power source, andreplace the power supply (see Remove a Power Supply from a QFX5120 Switch).

Do not remove the power supply until you have a replacement power supply ready: youmust install the power suppliesor a cover in the switch to ensure proper airflow.

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CAUTION: Replace a failed power supply with a cover or a new power supply within one minuteof removal to prevent chassis overheating.

Connect Power to a DC-Powered QFX5120-32C Switch

To connect power to a DC-powered QFX5120-32C switch:


2. Ensure that the input circuit breaker is open so that the voltage across the DC power source cable leads is 0 V andthat the cable leads do not become active while you are connecting DC power.

3. Ensure that the power supplies are fully inserted in the chassis.

4. Connect each power supply to the power source by inserting the DC connector of the power cable provided into thepower supply (see Figure 15).

Figure 15: Connect Power to a DC-Powered QFX5120-32C Switch

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5. Connect each power cable to the power sources. Secure power source cables to the power supplies by screwing thering lugs attached to the cables to the appropriate terminals.

• Connect the ring lug of the green-yellow cable to earth ground.

• Connect the ring lug of the black cable to the negative (–) DC power source.

• Connect the ring lug of the red cable to the positive (+) DC power source.

The QFX5120-32C is designed to operate with a DC power supply that has a single, nonredundant, feed input. Forsource redundancy, you must install two DC power supplies in the QFX5120-32C; connect source (A) to one powersupply and connect source (B) to the second power supply. This configuration provides the commonly deployed A/Bfeed redundancy for the system.

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CAUTION: The connection between each power source and power supply must include a circuitbreaker. Do not connect two sources to a single power supply because doing so can potentiallycause circulating current in feed wires whenever there is any difference in the voltage of the twosources.

6. Close the input circuit breaker.


7. Verify that the LED on the power supply is lit green. If the LED is lit red or blinking red, disconnect the power supplyfrom the power source, and replace the power supply (see Remove a Power Supply from a QFX5120 Switch).



Connect Power to a DC-powered QFX5120-48Y or QFX5120-48T Switch

To connect power to a DC-powered QFX5120-48Y or QFX5120-48T switch:


2. Verify that the DC power cables are correctly labeled before making connections to the power supply. In a typicalpower distribution schemewhere the return is connected to chassis ground at the battery plant, you can use amultimeterto verify the resistance of the –48V and RTN DC cables to chassis ground:

• The cable with very low resistance (indicating a closed circuit) to chassis ground is positive (+) and will be installedon the V+ (return) DC power input terminal.

• The cable with very high resistance (indicating an open circuit) to chassis ground is negative (–) and will be installedon the V– (input) DC power input terminal.

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CAUTION: You must ensure that power connections maintain the proper polarity. The powersource cables might be labeled (+) and (–) to indicate their polarity. There is no standard coding forDC power cables. The coding used by the external DC power source at your site determines thecoding for the leads on the power cables that attach to the DC power input terminals on eachpower supply.

3. Ensure that the input circuit breaker is open so that the voltage across the DC power source cable leads is 0 V andthat the cable leads do not become active while you are connecting DC power.

NOTE: The V+ terminals are referred to as +RTN, and the V– terminals are referred to as –48 V in DC PowerWiring Sequence Warning and DC Power Electrical Safety Guidelines.

4. Ensure that the power supplies are fully inserted in the chassis.

5. Remove the terminal block cover. The terminal block cover is a piece of clear plastic that snaps into place over theterminal block.

6. Remove the screws on the terminals using the screwdriver. Save the screws.

WARNING: Ensure that the power cables do not block access to device components or drapewhere people can trip on them.

7. Connect each power supply to the power sources. Secure power source cables to the power supplies by screwing thering lugs attached to the cables to the appropriate terminals by using the screw from the terminals (see Figure 16).

We’ve designed the QFX5120-48Y or QFX5120-48T switch to operate with a DC power supply that has a single,nonredundant, feed input. For source redundancy, you must install two DC power supplies in the QFX5120-48Y orQFX5120-48T switch; connect source (A) to one power supply and connect source (B) to the second power supply.This configuration provides the commonly deployed A/B feed redundancy for the system.

The terminal block of the power supply has four terminals labeled V+, V+, V–, and V– for connecting DC power sourcecables labeled positive (+) and negative (–). The V+ terminals are shunted internally together, as are the V– terminals.

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CAUTION: The connection between each power source and power supply must include a circuitbreaker.

Do not connect two sources to a single power supply because doing so can potentially causecirculating current in feedwires whenever there is any difference in the voltage of the two sources.

a. Secure the ring lug of the positive (+) DC power source cable to the V+ terminal on the DC power supply.

b. Secure the ring lug of the negative (–) DC power source cable to the V– terminal on the DC power supply.

c. Tighten the screws on the power supply terminals until snug using the screwdriver. Do not overtighten; applybetween 5 lb-in. (0.56 Nm) and 6 lb-in. (0.68 Nm) of torque to the screws.

CAUTION: The V+ terminals are shunted internally together, as are the V- terminals. The samepolarity terminal can be wired together from the same source to provide an additional current pathin a higher power chassis. Do not connect the terminals to different sources.

Figure 16: Secure Ring Lugs to the Terminals on the QFX51200-48Y or QFX51200-48T DC Power Supply

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8. Replace the terminal block cover.

9. Close the input circuit breaker.


10.Verify that the IN and OUT LEDs on the power supply are lit green. If the fault LED (!) is lit, disconnect the powersupply from the power source, and replace the power supply (see Remove a Power Supply from a QFX5120 Switch).

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Step 5: Perform Initial Configuration

You must perform the initial configuration for QFX5120 switch by using the console port.

1. Verify that the switch is powered on.

2. Connect the console port to a laptop or PC.

3. Set the following values by using the console server or PC:

• Baud rate—9600

• Flow control—none

• Data—8

• Parity—none

• Stop bits—1

• DCD state—disregard

4. Connect the console port (labeled CON) on the rear panel of the switch to a laptop or PC by using the RJ-45 to DB-9serial port adapter. The console port is located on the management panel of the switch.

5. Log in as the root user. You don’t need to enter a password. If the software boots before you connect to the consoleport, you might need to press the Enter key for the prompt to appear.

login root

6. Start the CLI.

root# cli

root@>

7. Enter configuration mode.

cli> configure

[edit]

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root@#

8. Add a password to the root administration user account.

[edit]

root@# set system root-authentication plain-text-password

New password: password

Retype new password: password

9. (Optional) Configure the name of the switch. If the name includes spaces, enclose the name in quotation marks (“ ”).

[edit]

root@# set system host-name host-name

10.Configure the default gateway.

[edit]

root@# set routing-options static route default next-hop address

11.Configure the IP address and prefix length for the switch management interface.

[edit]

root@# set interfaces em0 unit 0 family inet address address/prefix-length

NOTE: The management port em0 (labeledMGMT) is located on the front panel of the QFX5120-32Cswitch. The management ports em0 (labeled C0) and em1 (labeled C1) are located on the rear panel of theQFX5120-48Y switch. The management port em0 (labeledMGMT) is located on the rear panel of theQFX5120-48T switch.

12. (Optional) Configure the static routes to remote prefixes with access to the management port.

[edit]

root@# set routing-options static route remote-prefix next-hop destination-ip retain no-readvertise

13. Enable the Telnet service.

[edit]

root@# set system services telnet

14. Enable the SSH service.

[edit]

root@# set system services SSH

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15.Commit the configuration to activate it on the switch.

[edit]

root@# commit

16.Configure in-band management or out-of-band management:

• In in-band management, you can configure a network interface or an uplink module (expansion module) interface asthe management interface and connect it to the management device. In this scenario, you can do either of thefollowing:

• Use the automatically created VLAN named default for management of all data interfaces asmembers of the defaultVLAN. Specify the management IP address and the default gateway.

• Create a newmanagement VLAN. Specify the VLAN name, VLAN ID, management IP address, and default gateway.Select the ports that must be part of this VLAN.

• In out-of-bandmanagement, you use a dedicatedmanagement channel (MGMT port) to connect to themanagementdevice. Specify the IP address and gateway of the management interface. Use this IP address to connect to theswitch.

17. (Optional) Specify the SNMP read community, location, and contact to configure SNMP parameters.

18. (Optional) Specify the system date and time. Select the time zone from the list. The configured parameters are displayed.

19. Enter yes to commit the configuration. The configuration is committed as the active configuration for the switch.

You can now log in by using the CLI and continue configuring the switch.

Safety Warnings Summary

This is a summary of safetywarnings. For a complete list ofwarnings, including translations, see theQFX5120 documentationat https://www.juniper.net/documentation/product/en_US/qfx5120.

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https://www.juniper.net/documentation/product/en_US/qfx5120

WARNING:Failure to observe these safety warnings can result in personal injury or death.

• Permit only trained and qualified personnel to install or replace switch components.

• Perform only the procedures that are described in this quick start and theQFX Series documentation.Other services must be performed only by authorized service personnel.

• Before installing the switch, read the planning instructions in theQFX Series documentation tomakesure that the site meets power, environmental, and clearance requirements for the switch.

• Before connecting the switch to a power source, read the installation instructions available in theQFX Series documentation.

• To install the switch, you need one person to lift the switch and a second person to install themounting screws.

• If the rack has stabilizing devices, install them in the rack before mounting or servicing the switchin the rack.

• Before installing or after removing an electrical component, always place it component side up onan antistatic mat that is placed on a flat, stable surface or in an antistatic bag.

• Do not work on the switch, or connect or disconnect cables during electrical storms.

• Before you work on equipment that is connected to power lines, remove jewelry, including rings,necklaces, and watches. Metal objects heat up when connected to power and ground and can causeserious burns or become welded to the terminals.

Power Cable Warning (Japanese)

The attached power cable is only for this product. Do not use this cable for another product.

Contacting Juniper Networks

For technical support, see http://www.juniper.net/support/requesting-support.html.

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http://www.juniper.net/support/requesting-support.html

Juniper Networks, the Juniper Networks logo, Juniper, and Junos are registered trademarks of Juniper Networks, Inc. in theUnited States and other countries. All other trademarks, service marks, registered marks, or registered service marks are theproperty of their respective owners. Juniper Networks assumes no responsibility for any inaccuracies in this document. JuniperNetworks reserves the right to change, modify, transfer, or otherwise revise this publication without notice. Copyright © 2020Juniper Networks, Inc. All rights reserved. Rev. 03, August 2020.

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Documents

Quick Start Guide QFX5120 Switch Quick Start · • ForthevariantsQFX5120-48Y-DC-AFO2,QFX5120-48Y-DC-AFI2,QFX5120-48T-DC-AFO,andQFX5120-48T-DC-AFI poweredbyaDCpowersupply—14