The Juniper EX4100-48P is the 48-port PoE+ access switch in Juniper's EX4100 line — the current-generation, cloud-ready replacement class for the EX3400/EX4300 access switches Reef customers already run. It puts 48 Gigabit Ethernet ports with PoE+ on every port into a 1U chassis, with the uplink headroom to carry a modern phone, access-point, and camera fleet without a forklift upgrade.

Each access port delivers up to 30 W of PoE+, with a 740 W PoE budget on the single included power supply and up to 1,440 W with a second 920 W supply installed. Fast PoE and perpetual PoE keep endpoints powered through switch reboots and bring power back quickly on power-up — the behavior a closet full of IP phones and APs actually needs. Uplinks are 4 x 10GbE SFP+ ports plus 4 x 25GbE SFP28 ports that serve as additional uplinks or as Virtual Chassis stacking ports, linking up to ten EX4100 switches into one logical device. Switching capacity is 376 Gbps with 279 Mpps of throughput.

The EX4100 runs Junos OS with a full Layer 2/Layer 3 feature set, extends EVPN-VXLAN fabrics out to the access layer, and adds MACsec AES-256 link encryption and group-based-policy microsegmentation for endpoint-level security. It is built for Juniper Mist Wired Assurance: onboard, provision, and manage it from the Mist cloud, with Marvis AI assistance and flow-based telemetry for per-flow visibility. It also runs standalone under Junos CLI — a Mist subscription is an optional management layer, not a requirement, and is not included with this listing.

Hardware is serviceable in the rack: the switch includes one 920 W AC power supply (JPSU-920-AC-AFO, front-to-back airflow) and redundant field-replaceable fan modules installed, supports a second hot-swappable supply for redundancy and full PoE budget, and fits a standard 1U rack space at 17.36 in wide.

Key specifications

• 48 x 10/100/1000BASE-T RJ45 access ports, all PoE+ (IEEE 802.3at), up to 30 W per port
• PoE budget: 740 W with one power supply; up to 1,440 W with two power supplies
• Uplinks: 4 x 10GbE SFP+ plus 4 x 25GbE SFP28 (uplink / Virtual Chassis stacking)
• Switching capacity 376 Gbps; throughput 279 Mpps; MAC address table 64,000
• Virtual Chassis technology — stack up to 10 EX4100 switches as one logical device
• Junos OS — full Layer 2 and Layer 3 feature set, EVPN-VXLAN to the access layer
• MACsec AES-256, group-based-policy (GBP) microsegmentation, flow-based telemetry
• Juniper Mist Wired Assurance and Marvis AI ready (Mist subscription sold separately, not included)
• 1U rack-mountable: 17.36 x 1.72 x 13.78 in (base unit); 15.05 in deep with power supply installed
• 4 GB ECC DRAM, 8 GB storage, 1.7 GHz ARM CPU
• Operating temperature 32 to 113°F (0 to 45°C)

What's included: Refurbished EX4100-48P switch with 1 x JPSU-920-AC-AFO 920 W AC power supply and redundant fan modules installed, with Standard software. Optics/transceivers, a second power supply, stacking cables, and any Mist Wired Assurance subscription are NOT included and are sold separately.

Refurbished by Reef Telecom — this EX4100-48P is professionally refurbished, fully tested and cleaned, and is backed by Reef Telecom's 10-year warranty.

Condition

Certified Refurbished

Warranty

10-Year Reef Telecom Warranty

Manufacturer Part Number

EX4100-48P

Reef SKU

EX4100-48P-R

UPC

832938097377

Brand

Juniper

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All products include our industry-leading 10 Year Warranty backed by Reef Telecom.