Juniper EX4100-48P 48-Port PoE+ Layer 3 Access Switch

The Juniper EX4100-48P is a 48-port 10/100/1000BASE-T PoE+ Layer 3 managed access switch with 4 x SFP+ uplinks and 4 x SFP28 25G stacking ports — delivering enterprise-grade PoE+ access connectivity, full L3 routing, and Juniper Mist AI-driven cloud management for modern campus access layer deployments.

Key Features

• 48 x 10/100/1000BASE-T PoE+ ports (IEEE 802.3at) for APs, IP cameras, and PoE devices
• 4 x SFP+ uplink ports (1GbE/10GbE) for distribution layer connectivity
• 4 x SFP28 25G ports for high-speed stacking or additional uplinks
• Front-to-back airflow for hot-aisle/cold-aisle data center and wiring closet rack compatibility
• Juniper Mist AI-driven wired assurance for cloud management and anomaly detection

Product Specifications

• Part Number: EX4100-48P
• Manufacturer: Juniper Networks
• Access Ports: 48 x 10/100/1000BASE-T PoE+
• Uplink Ports: 4 x SFP/SFP+ (1GbE/10GbE)
• Stacking Ports: 4 x SFP28 (25GbE)
• Switching Capacity: 336 Gbps
• Form Factor: 1U Rack-mountable

Switch & Port Specifications

• PoE Budget: Up to 740W (with dual PSU)
• PoE Standard: IEEE 802.3at (PoE+, up to 30W per port)
• MAC Address Table: 32,000 entries
• VLAN Support: 4,094 VLANs
• Forwarding Rate: 250 Mpps
• Jumbo Frames: 9,216 bytes

Network & Protocol Specifications

• Routing: OSPFv2/v3, BGP, RIP v1/v2, VRRP, static routing
• Multicast: PIM SM/SSM, IGMP v1/v2/v3 snooping
• Security: 802.1X, MAC RADIUS, ACLs, DHCP snooping, DAI, IP source guard
• QoS: 8 queues per port, DSCP, 802.1p, WRED, scheduling
• Management: Junos OS CLI, NETCONF, SNMP v1/v2c/v3, Juniper Mist

Use Cases

• Enterprise campus access layer with 48-port PoE+ for wireless APs, IP phones, and cameras
• Juniper Mist AI-driven campus wired access for unified wired/wireless management
• High-density PoE+ wiring closet deployments with 10G uplinks and 25G stacking
• Replacing end-of-life PoE access switches in Juniper EX campus refresh deployments

Compatibility

• Stacks with other EX4100 models via 4 x 25GbE SFP28 stacking ports
• Managed via Juniper Mist cloud platform for AI-driven wired assurance
• Compatible with standard SFP/SFP+ uplink transceivers and 25G DAC/AOC stacking cables
• Supports Junos OS for consistent policy with EX, QFX, and MX platforms

Frequently Asked Questions

What is the total PoE budget of the EX4100-48P?

The EX4100-48P supports up to 740W total PoE budget with dual power supplies installed. With a single PSU, the PoE budget is reduced. Juniper's PoE budget calculator helps plan port allocations for mixed PoE+ device deployments across all 48 ports.

How does the EX4100-48P differ from the EX4300-48P?

The EX4100-48P is a newer platform with Juniper Mist native integration, 25G SFP28 stacking ports, and a higher switching capacity of 336 Gbps vs. the EX4300-48P's 128 Gbps. The EX4100 series represents Juniper's current generation campus access switching platform.

Can the EX4100-48P be managed without Juniper Mist?

Yes — the EX4100-48P supports full Junos OS CLI management, NETCONF, and SNMP independently of Mist. Juniper Mist is optional for cloud-managed deployments but is not required for on-premises Junos OS management.

The Juniper EX4100-48P delivers next-generation campus access switching with 48-port PoE+, 10G uplinks, 25G stacking, and Juniper Mist AI integration — providing the PoE density, L3 routing depth, and cloud management capability that modern enterprise campus access layer deployments demand.