1. Entwodiksyon
This manual provides essential information for the installation, operation, maintenance, and troubleshooting of your Juniper Networks EX3400-48P Ethernet Switch. The EX3400-48P is designed to deliver a high-performance, flexible, and cost-effective solution for demanding data, voice, and video enterprise access environments. It supports Juniper Networks Virtual Chassis technology for simplified network operations.
2. Enfòmasyon sou Sekirite
Please read and understand all safety instructions before installing or operating the device. Failure to follow these guidelines may result in injury or damage to the equipment.
- Asire bon baz ekipman an.
- Pa opere switch la nan kote ki mouye oswa ki gen dlo.amp kondisyon yo.
- Use only the power supply provided or approved by Juniper Networks.
- Evite bloke ouvèti vantilasyon pou anpeche surchof.
- Refer to qualified service personnel for any servicing not described in this manual.
3. Pwodwi souview
The Juniper Networks EX3400-48P is a 48-port Power over Ethernet (PoE+) capable Ethernet switch. It features a compact design suitable for rack mounting and offers various connectivity options.
3.1. Konpozan fizik yo

Figi 1: Angle view of the Juniper EX3400-48P Ethernet Switch, showing the top and front panels with the Juniper Networks logo.

Figi 2: Devan view of the EX3400-48P switch, highlighting the 48 Ethernet ports, uplink ports, and status LEDs.

Figi 3: Dèyè view of the EX3400-48P, displaying the modular power supply bay, fan modules, management (MGMT) port, and console (CON) port.

Figi 4: Dèyè angilè view of the EX3400-48P, showing the power supply unit partially extracted, illustrating its modular design.
3.2. Karakteristik Front Panel
- 48 pò Ethernet 10/100/1000BASE-T: For connecting network devices.
- Pò monte: SFP/SFP+ ports for high-speed connections to other switches or routers.
- LED estati: Indicators for system status, port activity, and PoE status.
3.3. Karakteristik Panèl Dèyè a
- Power Supply Bay: Houses the modular power supply unit.
- Modil fanatik: Provide cooling for the system.
- Management (MGMT) Port: An out-of-band Ethernet port for device management.
- Console (CON) Port: For local serial console access.
4. Enstalasyon
4.1. Debalaj ak Enspeksyon
Carefully remove the switch from its packaging. Inspect the device for any signs of physical damage. Report any damage to your supplier immediately.
4.2. Montaj etajè
The EX3400-48P is designed for standard 19-inch rack installation. Use the provided rack-mount brackets and screws to secure the switch in the rack. Ensure adequate space for airflow around the unit.
4.3. Koneksyon pouvwa
- Ensure the power switch on the rear panel is in the OFF position.
- Connect the power cord to the power supply unit on the rear of the switch.
- Branche lòt bout kòd kouran an nan yon priz kouran AC ki gen koneksyon ak tè.
- Flip the power switch to the ON position. The system status LED should illuminate.
4.4. Inisyal Konfigirasyon
For initial configuration, connect a console cable from your computer to the console port on the rear of the switch. Use a terminal emulation program (e.g., PuTTY, Tera Term) with the following settings:
- To Baud: 9600
- Done Bits: 8
- Parite: Okenn
- One Stop Bits: 1
- Kontwòl koule: Okenn
Follow the on-screen prompts to set up basic network parameters such as IP address, subnet mask, and default gateway.
5. Opere
5.1. Powering On / Off
- Pouvwa sou: After connecting the power cord, press the power switch to the ON position. The switch will perform a power-on self-test (POST).
- Pouvwa Off: To power off, press the power switch to the OFF position. For a controlled shutdown, it is recommended to save the configuration and issue a shutdown command via the command-line interface (CLI) before physically powering off.
5.2. Endikatè ki ap dirije
LED panèl devan yo bay yon vizyon sou estati fonksyònman switch la:
- SYS dirije: Indicates overall system status (e.g., green for normal operation, amber for warning, red for critical error).
- ALM dirije: Endike estati alam.
- PoE dirije: Indicates Power over Ethernet status.
- Pò LEDs: Indicate link status and activity for each Ethernet port.
5.3. Rezo konte genyen
The EX3400-48P can be configured via its command-line interface (CLI) or a web-based graphical user interface (GUI) if enabled. Common configurations include:
- VLAN creation and assignment.
- Port security settings.
- Routing protocols.
- Quality of Service (QoS) settings.
- Spanning Tree Protocol (STP) configuration.
Refer to the Juniper Networks documentation for detailed configuration guides specific to Junos OS.
6. Antretyen
6.1. Mizajou Firmware
Regularly check the Juniper Networks support website for the latest Junos OS firmware updates. Keeping the firmware up-to-date ensures optimal performance, security, and access to new features. Follow the instructions provided with the firmware package for the update procedure.
6.2. Netwayaj
Keep the switch clean and free of dust. Use a soft, dry cloth to wipe the exterior. For ventilation openings, use compressed air to remove dust buildup. Ensure the switch is powered off before cleaning.
6.3. Modular Component Replacement
The EX3400-48P features modular power supplies and fan trays. If a component fails, it can be replaced without powering down the entire switch (hot-swappable). Refer to the Juniper Networks hardware guide for specific replacement procedures.
NAN. Depanaj
Seksyon sa a bay solisyon pou pwoblèm komen ou ka rankontre.
7.1. Pa gen pouvwa
- Verifye kòd kouran an byen konekte ak tou de switch la ak priz kouran an.
- Tcheke si priz kouran an fonksyonèl.
- Asire w ke switch pouvwa a sou panèl dèyè a nan pozisyon ON.
- Inspect the power supply unit for any fault indicators.
7.2. No Link on Port
- Check the Ethernet cable connection at both ends.
- Asire w ke aparèy ki konekte a limen epi li fonksyone byen.
- Try a different port on the switch.
- Verify the cable is not damaged and meets specifications (e.g., Cat5e or higher).
7.3. Pwoblèm koneksyon rezo
- Verify IP address, subnet mask, and gateway settings on the switch and connected devices.
- Check VLAN configurations if applicable.
- Use diagnostic tools like
pingepitraceroutefrom the switch CLI. - Consult system logs for error messages.
8. Espesifikasyon
The following table outlines the technical specifications for the Juniper Networks EX3400-48P Ethernet Switch:
| Karakteristik | Spesifikasyon |
|---|---|
| Nimewo Modèl | EX3400-48P |
| Kantite pò | 48 |
| Kalite entèfas | SFP/SFP+ |
| Pousantaj Transfè Done | 336 Gigabit pou chak segonn |
| Voltage | 48 Vòlt (DC) |
| Ka Materyèl | Metal |
| Evalyasyon Tanperati Upper | 50 Degre Sèlsiyis |
| Dimansyon pwodwi | 17.2 x 13.78 x 1.73 pous |
| Pwa atik | 12.65 liv |
| Manifakti | Juniper |
| UPC | 832938071001 |
9. Garanti ak sipò
9.1. Garanti pwodwi
This product is typically covered by a manufacturer's warranty. Please refer to the specific warranty terms provided at the time of purchase or on the official Juniper Networks website. A 30-day return policy may apply depending on the vendor.
9.2. Sipò teknik
For technical assistance, documentation, software downloads, and further support, please visit the official Juniper Networks support website. You may also contact your authorized Juniper Networks reseller for local support options.





