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Silver 1U rack-mount switch with 48 RJ45 ports and four SFP+ uplinks

HPE Juniper Networking

HPE Juniper Networking EX4100-48P 48-port PoE+ network switch

SKU CH-K6ZS-M2F0M MPN EX4100-48P

48-port PoE+ managed Layer 3 switch with 4 × 10 GbE uplinks, 4 × 25 GbE stacking ports, 740 W single-PSU or 1440 W dual-PSU budget, and Mist AI cloud management

  • FormatDesktop
  • Network Management TypeManaged
  • Primary Ports48 x RJ45
  • SecurityMedia Access Control (MAC) limiting (per port and per VLAN)
  • PoEYes
  • QoSL2 QoS L3 QoS Ingress policing: 1 rate 2 color Hardware queu
  • 48 PoE+ ports power phones, cameras and APs with a 740 W single-supply budget
  • 1440 W total PoE budget when dual power supplies are installed for high-density deployments
  • Four 10 GbE uplinks and four 25 GbE stacking/uplink ports deliver high-speed aggregation
  • Layer 3 routing with 32,650 IPv4 prefixes and 16,100 multicast routes handles campus-scale traffic
  • Cloud onboarding and AI-driven analytics via Mist Wired Assurance simplify operations

48-port PoE+ access switch

The Juniper EX4100-48P is a managed Layer 3 switch built for business branches, campuses and data centres. It provides 48 RJ45 ports with PoE+ support plus four 10 GbE uplinks and four 25 GbE stacking or uplink ports for high-density aggregation.

Thermals and power draw

The chassis measures 44.1 x 4.37 x 35 cm without power supplies and extends to 38.24 cm depth when a supply is fitted. A single 920 W AC supply delivers a 740 W PoE budget, while dual supplies raise the budget to 1440 W for attached devices.

Build and connectivity

The desktop form factor weighs 4.66 kg and supports jumbo frames up to 9216 bytes, 64,000 MAC addresses and 253 VST instances. MACsec AES256 encryption, EVPN-VXLAN and Mist AI cloud management are standard, enabling secure, automated operations across the access layer.

Highlights

  • 48 PoE+ ports power phones, cameras and APs with a 740 W single-supply budget
  • 1440 W total PoE budget when dual power supplies are installed for high-density deployments
  • Four 10 GbE uplinks and four 25 GbE stacking/uplink ports deliver high-speed aggregation
  • Layer 3 routing with 32,650 IPv4 prefixes and 16,100 multicast routes handles campus-scale traffic
  • Cloud onboarding and AI-driven analytics via Mist Wired Assurance simplify operations

Specifications

BrandJuniper Networks, Inc.
SeriesEX4100
ModelEX4100-48P
Part NumberEX4100-48P
FormatDesktop
Network Management TypeManaged
Primary Ports48 x RJ45
SecurityMedia Access Control (MAC) limiting (per port and per VLAN)
Allowed MAC addresses: 64,000
Dynamic Address Resolution Protocol (ARP) dynamic ARP inspection (DAI)
IP source guard
Local proxy ARP
Static ARP support
Dynamic Host Configuration Protocol (DHCP) snooping
Captive portal
Persistent MAC address configurations
Distributed denial of service (DDoS) protection (CPU control path flooding protection)
PoEYes
QoSL2 QoS
L3 QoS
Ingress policing: 1 rate 2 color
Hardware queues per port: 12 (8 unicast + 4 multicast)
Scheduling methods (egress): Strict priority (SP), weighted deficit round-robin (WDRR)
802.1p, DiffServ code point (DSCP)/IP precedence trust and marking
L2-L4 classification criteria: Interface, MAC address, Ethertype, 802.1p, VLAN, IP address, DSCP/IP precedence, TCP/UDP port numbers, and more
Congestion avoidance capabilities: Tail drop, weighted random early detection (WRED)
Layer3
Layer 2 FeaturesLayer 2 switching
Maximum MAC addresses per system: 64,000
Jumbo frames: 9216 bytes
Range of possible VLAN IDs: 1 to 4094
Virtual Spanning Tree (VST) instances: 253
Port-based VLAN
Voice VLAN
Physical port redundancy: Redundant trunk group (RTG)
Compatible with Per-VLAN Spanning Tree Plus (PVST+)
Routed VLAN interface (RVI)
Uplink failure detection (UFD)
ITU-T G.8032: Ethernet Ring Protection Switching
IEEE 802.1AB: Link Layer Discovery Protocol (LLDP)
LLDP-MED with VoIP integration
Default VLAN and multiple VLAN range support
MAC learning deactivate
Persistent MAC learning (sticky M
Layer 3 FeaturesLayer 3 features: IPv4
Maximum number of ARP entries: 32,000
Maximum number of IPv4 unicast routes in hardware: 32,650 prefixes; 32,150 host routes
Maximum number of IPv4 multicast routes in hardware: 16,100 multicast routes
Routing protocols: RIPv1/v2, OSPF, BGP, IS-IS
Static routing
Routing policy
Bidirectional Forwarding Detection (BFD)
L3 redundancy: Virtual Router Redundancy Protocol (VRRP)
VRF-Lite: 1000
Layer 3 features: IPv6
Maximum number of neighbor discovery (ND) entries: 16,000
Maximum number of IPv6 unicast routes in hardware: 16,200 prefixes; 16,050 host routes
Maximum
PoE Ports48 x PoE
PoE Power Budget1PSU : 740 W
2 PSU: 1440 W
PowerPower Supply rating: 920 W AC
DimensionsBase Unit: 17.36 x 1.72 x 13.78 in (44.1 x 4.37 x 35 cm)
With power supply installed: 17.36 x 1.72 x 15.05 in (44.1 x 4.37 x 38.24 cm)
Weight10.27 lb (4.66 kg)
Shipping weight4.54 kg
Package size508 × 508 × 305 mm

Questions about this item

How do I mount the EX4100-48P in a rack and which step is often missed?

The switch is 17.36 in wide, 1.72 in high and 13.78 in deep without a power supply, growing to 15.05 in deep once a 920 W AC unit is fitted. The step most installers miss is leaving enough rear clearance for the power-supply exhaust and cable bend radius.

Which components of the EX4100-48P will need replacement over time and how can I plan for it?

The 920 W AC power supply is the only field-replaceable part listed. With a single PSU the PoE budget is 740 W; adding a second unit raises it to 1440 W and provides redundancy, so plan to keep a spare PSU on site for hot-swap replacement.

What is the first hard limit the EX4100-48P hits under sustained heavy traffic?

The MAC-address table tops out at 64,000 entries and the IPv4 host-route table at 32,150 entries. Either ceiling stops new forwarding entries from being learned, so monitor both counters in Mist AI before they fill.

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