EX4100-48MP — Multigigabit PoE++ Access for AI-Driven Campus Networks
The Juniper EX4100-48MP is a 1U 48-port multigigabit PoE++ access switch built for enterprise campus, branch, and data center top-of-rack deployments in the AI era. As part of the
Juniper EX4100 Series, the EX4100-48MP combines Mist AI cloud management, EVPN-VXLAN to the access layer, MACsec AES-256 encryption, and a robust hardware foundation — making it ideal for modern enterprise networks that need high bandwidth, rich telemetry, and simplified operations.
At a Glance
- Access ports: 16 x 100M/1/2.5GbE + 32 x 10M/100M/1GbE PoE++ access ports
- PoE budget: 1620W (with dual PSUs)
- Uplinks: 4 x 1/10GbE SFP+ + 4 x 10/25GbE SFP28
- Switching capacity: 212 Gbps unidirectional / 424 Gbps bidirectional, 315 Mpps forwarding
- Form factor: 1U, 920W AC AFO (front-to-back airflow)
- Cloud management: Juniper Mist Wired Assurance + Marvis AI Assistant
Key Features:
- Scalability: 16 x 100M/1/2.5GbE + 32 x 10M/100M/1GbE PoE++ access ports support current and next-generation endpoints, with a 200 Gbps Virtual Chassis backplane that interconnects up to 10 EX4100 switches into a single logical device.
- Performance: Non-blocking architecture with 212 Gbps unidirectional switching and 315 Mpps L2/L3 forwarding for latency-sensitive applications.
- Automation: Native integration with Juniper Mist Wired Assurance, Marvis AI Assistant, Zero Touch Provisioning, and open APIs streamlines provisioning, monitoring, and troubleshooting.
- Reliability: Redundant hot-swappable power supplies and field-replaceable fan modules, combined with Virtual Chassis support, deliver high availability with simplified scaling.
- Security: MACsec AES-256 encryption, standards-based microsegmentation using group-based policies (GBP), 802.1X port access control, and DDoS protection for the control plane.
- Fabric-Ready: EVPN-VXLAN to the access layer enables consistent end-to-end campus segmentation and pay-as-you-grow leaf-spine architectures.
PoE++ Power Delivery
This switch delivers
90W per port across all access ports, with a total PoE budget of
1620W (with dual PSUs). The design supports dense endpoint deployments where high-power devices and standard PoE devices share the same chassis.
- PoE class: PoE++ (IEEE 802.3bt), delivering up to 90W per port.
- Total PoE budget: 1620W (with dual PSUs), enabling fully-loaded PoE deployments on a single switch.
- Fast PoE: Power is delivered to connected devices within seconds of switch power-on, eliminating boot-time gaps for cameras, access points, and other always-on infrastructure.
AI-Native Operations with Mist Cloud and Marvis
Tight integration with the Juniper Mist cloud provides AI-driven insights and automation at the access layer.
- Mist Wired Assurance: Cloud-based Day 0 onboarding, Day 1 configuration, and Day 2+ lifecycle management improve time-to-service and reduce human error across EX4100 campus deployments.
- Marvis Virtual Network Assistant: Uses AI/ML to detect anomalies, suggest corrective actions, and predict issues before users are impacted.
- Streaming Telemetry: Flow-based telemetry, Junos Telemetry Interface (JTI), and support for gRPC and OpenConfig enable high-frequency metrics and deep performance visibility.
- Open Automation: Zero Touch Provisioning (ZTP), REST APIs, Ansible, and Python automation integrate cleanly with existing NetOps workflows.
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Throughput, Uplinks, and Stacking
Per-port performance is balanced with flexible uplink and stacking options for both standalone and Virtual Chassis deployments.
- Switching capacity: 212 Gbps unidirectional / 424 Gbps bidirectional with 64-byte packets — non-blocking at full access load.
- Forwarding rate: 315 Mpps L2/L3 with 64-byte packets.
- Uplinks: 4 x 1/10GbE SFP+ + 4 x 10/25GbE SFP28. The four SFP28 ports can be used for Virtual Chassis interconnect at 25GbE per link, or reconfigured as Ethernet uplinks to a distribution or core layer.
- Virtual Chassis: Up to 10 EX4100 switches can be combined into a single logical device using the 25GbE SFP28 ports, with a 200 Gbps Virtual Chassis backplane.
Enterprise-Ready Hardware and Environmental Efficiency
The platform is built for demanding enterprise environments, with robust hardware design and efficient operation that aligns with both wiring-closet and data center cooling models.
- Form factor: 1U fixed-configuration chassis (10.41 lb (4.72 kg)) designed for standard 19″ racks, all ports front-accessible.
- Power supply: 920W AC AFO (front-to-back airflow), dual hot-swappable for full redundancy.
- Cooling: 61.7 CFM maximum airflow with two power supplies and fans. Front-to-back airflow (AFO) is standard; back-to-front (AFI) variants are available for hot-aisle/cold-aisle data center alignment.
- Operating range: 32° to 113°F (0° to 45°C), up to 5000 ft altitude at 40°C.
- Memory: 4 GB DRAM with ECC, 8 GB storage, 1.7 GHz ARM CPU.
Security Built In at the Hardware and Software Layers
Security is integrated at both hardware and software layers to protect users, devices, and services across the campus.
- MACsec AES-256: Line-rate switch-to-switch encryption on supported ports, securing traffic between access and distribution layers.
- Access Control: 802.1X port-based access, MAC authentication, RADIUS-based dynamic VLAN assignment, and 802.1X with VoIP VLAN support.
- Microsegmentation: Group-based policies (GBP) and EVPN-VXLAN enable fine-grained segmentation for users, devices, and applications.
- Control Plane Protection: Control Plane Policing (CoPP), DHCP snooping, dynamic ARP inspection, IP source guard, and DDoS protection mitigate common Layer 2/Layer 3 attacks.
Deployment Scenarios
This switch fits multiple roles in modern enterprise networks — access, aggregation, and small data center top-of-rack.
Campus Access
Deploy as a high-density access switch in wiring closets, leveraging 25GbE Virtual Chassis stacking or 10GbE uplinks into a distribution layer. For broader options across the EX4100 family, browse the
EX4100 Series.
Branch and Remote Sites
For distributed enterprises, it serves as a consolidated access and aggregation node, simplifying design and operations while keeping consistent security and policy across the campus fabric.
Data Center Top-of-Rack
In small data center pods, EVPN-VXLAN-ready leaf functionality is delivered with up to 4 x 25GbE uplinks into a spine.
Use Cases by Industry
Strong fit across verticals that require secure, high-performance wired access.
- Higher Education: Wired access for lecture halls, dormitories, and research facilities with dense endpoint counts.
- Healthcare: Secure wired connectivity for clinical devices, IP cameras, and medical-grade APs with strong segmentation and monitoring.
- Corporate Campuses: Edge switching for collaboration spaces, conference rooms, and office floors with Mist-managed operations across EX4100-based access layers.
- Retail: Reliable wired connectivity for POS terminals, cameras, wireless APs, and digital signage.
- Manufacturing & Industrial: Access for sensors, controllers, and operational-technology endpoints in warehouses and production environments.
Regulatory Compliance
Compliance with major environmental and safety standards enables global deployments and sustainable lifecycle management.
- RoHS: Restriction of Hazardous Substances compliance.
- REACH: Registration, Evaluation, Authorization and Restriction of Chemicals compliance for EU regulatory requirements.
- WEEE: Waste Electrical and Electronic Equipment Directive adherence, supporting responsible recycling and end-of-life handling.
EX4100-48MP vs. Other Juniper EX4100 Models
The EX4100 line includes four access switch models — here’s how this one compares when you’re picking the right platform.
Juniper EX4100-48MP (this model)
- Access Ports: 16 x 100M/1/2.5GbE + 32 x 10M/100M/1GbE PoE++ access ports.
- PoE Budget: 1620W (with dual PSUs).
- Best Use Case: High-density Wi-Fi 6/6E, IoT-heavy campuses, and smart buildings needing PoE++ across a full 48 ports with multigigabit headroom on 16 of them.
Juniper EX4100-24MP
- Access Ports: 8 x 100M/1/2.5/5/10GbE + 16 x 10M/100M/1GbE PoE++ access ports.
- PoE Budget: 1440W (with dual PSUs).
- Best Use Case: Smaller IDFs, branch sites, and focused AP/IoT deployments where multigigabit (up to 10GbE on copper) is required at lower port density.
Juniper EX4100-48T
- Access Ports: 48 x 10/100/1000BASE-T access ports (no PoE).
- PoE Budget: N/A.
- Best Use Case: Cost-efficient campus and branch access where endpoints do not need PoE — desktops, wired-only conference rooms, server-room top-of-rack for non-powered devices.
Juniper EX4100-48P
- Access Ports: 48 x 10/100/1000BASE-T PoE+ access ports.
- PoE Budget: 1440W (with dual PSUs).
- Best Use Case: Traditional campus deployments where 1GbE access plus standard PoE+ is sufficient — Wi-Fi 5/6 APs, IP phones, cameras, and standard PoE endpoints without multigigabit needs.
For broader Juniper switching options, browse the full
Juniper EX Series catalog, or compare against the newer-generation
EX4400 Series for higher-density multigigabit deployments.
Explore the EX4100-48MP for Your Network
Whether you are refreshing a legacy campus, rolling out Wi-Fi 6/6E at scale, or building a Mist-managed cloud-native access layer, the
EX4100-48MP delivers the right mix of performance, automation, and security to support your next-generation wired edge. Our team can help you compare EX4100 models based on port speeds, PoE requirements, airflow direction, and deployment role so you can standardize on the most cost-effective configuration for your campus or branch.
Q: How many Wi-Fi 6/6E access points can the EX4100-48MP power simultaneously? A: With a 1620W PoE++ budget on dual power supplies, the 48MP can power roughly 40+ Wi-Fi 6E APs drawing 30-40W each, or fewer high-draw 60W tri-radio Wi-Fi 7 APs. Per-port LLDP negotiation lets each AP request precisely the wattage it needs. Q: Does PoE++ at 90W work on every one of the 48 access ports? A: Yes. All 48 access ports are IEEE 802.3bt Type 4 capable and can deliver up to 90W individually, subject to the total chassis PoE budget. The dual-PSU configuration provides 1620W of total budget, with 740W available on a single PSU. Q: Can the EX4100-48MP be combined with smaller EX4100 models in a Virtual Chassis? A: Yes. Up to 10 mixed EX4100 switches (48MP, 24MP, 48T, 48P) can stack into a single logical Virtual Chassis via the 25GbE SFP28 ports, with a 200 Gbps backplane interconnect. Q: Are the 16 multigigabit ports limited to 2.5GbE, or can they run higher speeds? A: On the 48MP specifically, the 16 multigigabit ports support 100M / 1GbE / 2.5GbE on copper. If you need 5GbE or 10GBASE-T copper on access ports, the EX4100-24MP is the model that supports those higher copper speeds. Q: Is the EX4100-48MP refurbished hardware suitable for production Wi-Fi access deployments? A: Yes. BrightStar Systems supplies tested, refurbished EX4100-48MP units with documented condition reports and a 1-year warranty for end-user customers. Most enterprise wireless refresh projects deploy refurbished campus access switches without issue.
