Juniper QFX5120-48Y-AFO2 Network Switch User Manual

1. Introduction

This manual provides essential information for the installation, operation, and maintenance of the Juniper QFX5120-48Y-AFO2 network switch. This high-performance switch is designed for data center and enterprise environments, offering 48 ports of 25 Gigabit Ethernet and 8 ports of 100 Gigabit Ethernet, along with front-to-back airflow for efficient cooling.

Please read this manual thoroughly before attempting to install or operate the device to ensure proper functionality and safety.

2. What's in the Box

Verify that all components are present and undamaged upon unpacking:

• 1x Juniper QFX5120-48Y-AFO2 Network Switch
• 2x Power Supply Units (PSU)
• 1x Rack Mount Kit (Note: Rails Kit not included with this renewed product)
• 2x Power Cords
• 1x Console Cable

3. Setup

3.1 Physical Installation

The Juniper QFX5120-48Y-AFO2 switch is designed for rack mounting. Ensure the rack is stable and has adequate space for ventilation.

1. Rack Mounting: Attach the provided rack mount brackets to the sides of the switch using the screws included with the kit. Secure the switch into a standard 19-inch equipment rack. Ensure proper alignment and support.
2. Airflow Considerations: This model features front-to-back airflow. Ensure that the rack environment supports this airflow direction to prevent overheating. Cool air enters from the front and exits from the rear.

3.2 Power Connection

The switch comes with dual power supply units for redundancy.

1. Insert both power supply units into their respective slots at the rear of the switch.
2. Connect the provided power cords to the PSUs and then to a grounded AC power source.
3. Ensure the power source meets the voltage and current requirements specified in the 'Specifications' section.

3.3 Network Connections

Connect network cables to the appropriate ports on the front panel.

This image displays the front panel of the Juniper QFX5120-48Y-AFO2 switch. It features 48 small form-factor pluggable (SFP28) ports for 25 Gigabit Ethernet connections, arranged in two rows. To the right, there are 8 larger quad small form-factor pluggable (QSFP28) ports for 100 Gigabit Ethernet connections. The design indicates front-to-back airflow, crucial for cooling in data center environments.

• 25G Ports: Use SFP28 transceivers and compatible fiber optic cables for 25 Gigabit Ethernet connections.
• 100G Ports: Use QSFP28 transceivers and compatible fiber optic cables for 100 Gigabit Ethernet connections.

3.4 Console Connection

For initial configuration and management, connect a computer to the console port using the provided console cable.

• Connect one end of the console cable to the console port on the switch.
• Connect the other end to a serial port or USB-to-serial adapter on your computer.
• Configure your terminal emulation software (e.g., PuTTY, Tera Term) with the following settings: 9600 baud, 8 data bits, no parity, 1 stop bit, no flow control.

4. Operating Instructions

4.1 Powering On

Once all physical connections are secure, the switch will power on automatically when connected to a power source. Observe the system status LEDs for boot-up progress.

4.2 Initial Configuration

Access the switch via the console port for initial setup, including IP address assignment, management credentials, and basic network settings. Refer to Juniper's official documentation for detailed Junos OS configuration guides.

4.3 Status Indicators (LEDs)

The front panel features various LEDs to indicate the operational status of the switch and its ports. Consult the official Juniper documentation for a complete description of LED behaviors and their meanings.

• System Status LEDs: Indicate power, alarm, and system health.
• Port LEDs: Indicate link status, activity, and speed for each network port.

5. Maintenance

5.1 Environmental Conditions

Maintain the operating environment within specified temperature and humidity ranges to ensure optimal performance and longevity of the switch. Ensure proper airflow around the unit.

5.2 Cleaning

Periodically clean the exterior of the switch with a soft, dry, lint-free cloth. Do not use liquid or aerosol cleaners directly on the device. Ensure ventilation openings are free from dust and obstructions.

5.3 Firmware Updates

Regularly check for and apply firmware (Junos OS) updates from Juniper Networks. Firmware updates often include performance enhancements, security patches, and bug fixes. Follow Juniper's recommended procedures for software upgrades.

6. Troubleshooting

This section provides basic troubleshooting steps for common issues. For more complex problems, refer to Juniper's official support documentation or contact technical support.

6.1 No Power

• Verify that power cords are securely connected to both the switch PSUs and the power outlets.
• Check the power source (outlet, PDU) for functionality.
• Ensure the power supply units are fully seated in their bays.

6.2 No Link on Port

• Check the network cable for damage and ensure it is properly connected at both ends.
• Verify that the transceiver (SFP28/QSFP28) is correctly inserted and compatible.
• Ensure the connected device is powered on and configured correctly.
• Check the port configuration on the switch (e.g., enabled, speed, duplex).

6.3 Console Access Issues

• Verify the console cable connection.
• Confirm that your terminal emulation software settings (baud rate, data bits, parity, stop bits, flow control) match those specified in Section 3.4.
• Ensure the correct COM port is selected on your computer.

7. Specifications

8. Warranty and Support

This product is offered as a renewed item. For specific warranty details and support options, please refer to the terms provided by the seller, Amazon Renewed, at the time of purchase. General technical support and documentation for Juniper products can be found on the official Juniper Networks website.

For assistance with this renewed product, please contact the Amazon Renewed seller directly or refer to your purchase documentation.