The Juniper Networks EX4650 Ethernet Switch is a compact, scalable, and high-performance platform designed for midsized to large enterprise campus distribution environments.

Supporting native 10GbE, 25GbE, 40GbE, and 100GbE connectivity, the EX4650 provides the performance and port density required for modern enterprise networks while simplifying network topology and operations.

The switch also delivers rich streaming telemetry to Juniper Mist Wired Assurance, enabling AI-powered automation, service-level visibility, and simplified cloud-based management.

Cloud-Ready Campus Distribution

The EX4650 is cloud-ready and supports Zero-Touch Provisioning (ZTP).

Through Juniper Mist Wired Assurance, administrators can:

• Onboard switches
• Provision devices
• Configure network infrastructure
• Monitor switch health
• Troubleshoot network issues
• Improve connected-device experiences

The Juniper Mist Cloud also simplifies campus fabric deployment and management, while Mist AI provides greater visibility into connected-device performance.

Features and Benefits

Juniper Mist Wired Assurance

Juniper Mist Wired Assurance allows administrators to claim, configure, and troubleshoot EX4650 switches through a cloud-based management platform.

The switch provides rich streaming telemetry for:

• Switch health metrics
• Anomaly detection
• Service-Level Expectations
• Connected-device performance

AI-driven automation can help streamline IT operations, reduce Mean Time to Repair, and improve wired and wireless user experiences.

EVPN-VXLAN

The EX4650 supports:

• EVPN-VXLAN

This provides a common networking technology across campus and data center environments.

EVPN-VXLAN helps simplify:

• Network deployment
• Fabric operations
• Segmentation
• Campus and data center integration

Virtual Chassis

With Juniper Virtual Chassis technology, up to:

• 4 EX4650 switches

can be interconnected and operated as one logical device.

This helps:

• Simplify switch management
• Reduce operational complexity
• Centralize network administration
• Increase network scalability

Wire-Speed Performance

The EX4650 provides wire-speed connectivity using native:

• 10GbE
• 25GbE
• 40GbE
• 100GbE

This combination of high-speed port densities simplifies enterprise distribution and aggregation network designs.

EX4650 Product Architecture

The EX4650 provides up to:

• 4 Tbps of bidirectional Layer 2 and Layer 3 connectivity

in a compact:

• 1RU platform

It includes:

• 48 x 1/10/25GbE SFP/SFP+/SFP28 ports
• 8 x 40/100GbE QSFP+/QSFP28 ports

This allows the switch to support mixed environments using:

• 1GbE
• 10GbE
• 25GbE
• 40GbE
• 100GbE

EX4650 Models

Four main EX4650 configurations are available.

They differ according to:

• AC or DC power
• Front-to-back or back-to-front airflow

All four configurations include:

• Dual power supplies
• Redundant fans
• 48 x 1/10/25GbE ports
• 8 x 40/100GbE ports

EX4650-48Y-AFI

The EX4650-48Y-AFI provides:

• 48 x 25GbE/10GbE/GbE SFP28/SFP+/SFP ports
• 8 x 100GbE/40GbE QSFP28/QSFP+ ports
• Redundant fans
• 2 AC power supplies
• 2 power cords
• 4-post rack-mount kit
• Back-to-front airflow

EX4650-48Y-AFO

The EX4650-48Y-AFO provides:

• 48 x 25GbE/10GbE/GbE SFP28/SFP+/SFP ports
• 8 x 100GbE/40GbE QSFP28/QSFP+ ports
• Redundant fans
• 2 AC power supplies
• 2 power cords
• 4-post rack-mount kit
• Front-to-back airflow

EX4650-48Y-DC-AFI

The EX4650-48Y-DC-AFI provides:

• 48 x 25GbE/10GbE/GbE SFP28/SFP+/SFP ports
• 8 x 100GbE/40GbE QSFP28/QSFP+ ports
• Redundant fans
• 2 DC power supplies
• 2 power cords
• 4-post rack-mount kit
• Back-to-front airflow

EX4650-48Y-DC-AFO

The EX4650-48Y-DC-AFO provides:

• 48 x 25GbE/10GbE/GbE SFP28/SFP+/SFP ports
• 8 x 100GbE/40GbE QSFP28/QSFP+ ports
• Redundant fans
• 2 DC power supplies
• 2 power cords
• 4-post rack-mount kit
• Front-to-back airflow

EX4650 Hardware Specifications

Switching Capacity

The EX4650 provides:

• 2 Tbps unidirectional switching capacity
• 4 Tbps bidirectional switching capacity

Maximum Layer 2 and Layer 3 throughput with 64-byte packets is:

• 2976 Mpps at wire speed

Weight

The EX4650 weighs:

• 23.7 lb
• 10.75 kg

Dimensions

Dimensions are:

• 1.72 x 17.36 x 20.48 inches
• 4.37 x 44.09 x 52.02 cm

The platform occupies:

• 1 rack unit

Switching Modes

The EX4650 supports:

• Cut-through switching
• Store-and-forward switching

Power Consumption

Power consumption is listed as:

• Maximum load: 450W
• Typical load: 260W
• Idle load: 160W

Interface Options

1GbE

The EX4650 supports:

• Up to 48 x 1GbE SFP interfaces

10GbE

The switch supports:

• 48 native 10GbE SFP+ interfaces
• Up to 80 x 10GbE interfaces using breakout cables

25GbE

The platform supports:

• 48 native 25GbE SFP28 interfaces
• Up to 80 x 25GbE interfaces using breakout cables

40GbE

The EX4650 provides:

• 8 x 40GbE QSFP+ ports

Each QSFP+ port can operate as:

• 1 x 40GbE interface
• 4 x 10GbE interfaces

100GbE

The switch provides:

• 8 x 100GbE QSFP28 ports

Each QSFP28 port can operate as:

• 1 x 100GbE interface
• 4 x 25GbE interfaces

Management Connectivity

The EX4650 includes:

• 1 x USB 2.0 port
• 1 x RS-232 console port
• 2 x RJ-45 management ports

Supported Transceivers and Cables

Supported connectivity options listed on the page include:

SFP

• 1GbE optical modules
• 1GbE copper modules

SFP+

• 10GbE optical modules
• 1m and 3m twinax DAC cables
• 1m, 3m, 5m, and 7m active twinax cables

SFP28

• 1m twinax DAC
• SR optics
• LR optics

QSFP+

Supported QSFP+ optics include:

• SR4
• LX4
• ESR4
• ER4
• LR4

QSFP+ DAC options include:

• 1m
• 3m twinax copper

QSFP+ to SFP+ breakout cables are also supported for 10GbE connections.

QSFP28

Supported QSFP28 optics include:

• SR4
• ER4
• PSM4
• CWDM4
• LR4

QSFP28 to SFP28 breakout cables support 25GbE connectivity.

Virtual Chassis Capabilities

Both:

• 40GbE
• 100GbE

interfaces can operate as Virtual Chassis ports.

Virtual Chassis capabilities include:

• Routing Engine election
• Virtual Chassis pre-provisioning
• Plug-and-play deployment
• Automatic LAG formation on Virtual Chassis ports
• FCoE transit across members
• QoS on Virtual Chassis ports
• Local designated forwarding
• Graceful Routing Engine Switchover
• Nonstop Routing
• Nonstop Bridging
• Distributed aggregate interface monitoring
• Control-plane protection for the virtual Routing Engine

Rack Installation

The EX4650 supports four-post mounting for:

• 19-inch server racks
• Datacom racks

The EX-4PST-RMK provides the four-post rack-mount kit.

Airflow and Cooling

The EX4650 supports both:

• Front-to-back airflow
• Back-to-front airflow

Cooling is provided by:

• Redundant N+1 hot-pluggable fan modules
• Variable-speed fans

The variable-speed design helps reduce unnecessary power consumption.

Power Supplies

The EX4650 uses:

• Dual redundant 1+1 power supplies
• Hot-pluggable 650W AC/DC power supplies

Supported AC input:

• 110–240V single-phase AC

Supported DC input:

• -44V to -72V DC

The platform also provides:

• Redundant 4+1 hot-pluggable fan modules

Power Supply Options

JPSU-650W-AC-AFO

Juniper 650W AC power supply with:

• Port-side to FRU-side airflow

JPSU-650W-AC-AFI

Juniper 650W AC power supply with:

• FRU-side to port-side airflow

JPSU-650W-DC-AFO

650W DC power supply for front-to-back airflow configurations.

JPSU-650W-DC-AFI

Juniper 650W DC power supply with:

• FRU-side to port-side airflow

Fan Modules

QFX5110-FANAFI

Fan module with:

• Back-to-front airflow

QFX5110-FANAFO

Fan module with:

• Front-to-back airflow

Layer 2 Scale

The EX4650 supports:

• 288,000 MAC addresses
• 4,093 VLAN IDs
• 80 Link Aggregation Groups
• Up to 64 ports per LAG
• 64 MSTP instances
• 509 VSTP instances
• Jumbo frames up to 9,216 bytes

Firewall Filter Scale

The platform supports:

• 1,500 ingress filters
• 512 egress filters

Layer 3 Scale

IPv4

The EX4650 supports:

• 360,000 IPv4 unicast prefixes
• 208,000 IPv4 unicast routes
• 104,000 IPv4 multicast routes

ECMP

The platform supports:

• 64 ECMP paths

IPv6

The EX4650 supports:

• 170,000 IPv6 unicast prefixes
• 104,000 IPv6 unicast routes
• 52,000 IPv6 multicast routes

ARP

The platform supports:

• 64,000 ARP entries

Traffic Mirroring Scale

The switch supports:

• 4 mirroring destination ports per switch
• 4 mirroring sessions
• 4 mirroring destination VLANs per switch

Layer 2 Features

Supported Layer 2 capabilities include:

• IEEE 802.1D STP
• Rapid Spanning Tree Protocol
• Multiple Spanning Tree Protocol
• Redundant Trunk Group
• BPDU protection
• Loop protection
• Root protection
• Concurrent RSTP and VSTP
• IEEE 802.1Q VLAN trunking
• Routed VLAN Interface
• Port-based VLAN
• Private VLAN
• VLAN translation
• Static MAC address assignment
• Per-VLAN MAC learning limits
• MAC learning deactivation
• Link Aggregation Control Protocol

Link Aggregation

The EX4650 supports:

• MC-LAG
• EVPN Multihoming
• ESI-LAG

Load sharing can use information including:

• Source and destination IP addresses
• TCP/UDP source ports
• TCP/UDP destination ports
• Source and destination MAC addresses
• Ethertype
• VLAN ID
• Source port

Layer 3 IPv4 Features

Supported Layer 3 capabilities include:

• Static routing
• RIP
• OSPF
• IS-IS
• BGP
• VRRP
• BFD
• Virtual Router
• DHCP relay
• Proxy ARP

Multicast

Supported multicast capabilities include:

• IGMP v1
• IGMP v2
• IGMP v3
• IGMP snooping
• IGMP filtering
• PIM-SM
• PIM-SSM
• PIM-DM
• MSDP

Security and Filters

Security capabilities include:

• Secure interface login
• Password protection
• RADIUS
• TACACS+
• Ingress filters
• Egress filters
• Port filters
• VLAN filters
• Routed filters
• Management-port filters
• SSH v1/v2
• Static ARP
• Storm control
• Port-error deactivation
• Automatic recovery
• Sticky MAC addresses
• DHCP snooping

Filter actions include:

• Logging
• System logging
• Reject
• Interface mirroring
• Counters
• Forwarding-class assignment
• Permit
• Drop
• Policing
• Marking

Quality of Service

The EX4650 supports Layer 2 and Layer 3 QoS capabilities including:

• Classification
• Rewrite
• Queuing

Rate-limiting capabilities include:

• Ingress policing
• Egress policing
• Egress shaping

Each port provides:

• 10 hardware queues

including:

• 8 unicast queues
• 2 multicast queues

Queuing and congestion-management technologies include:

• Strict Priority
• Shaped Deficit Weighted Round-Robin
• Weighted Random Early Detection
• Weighted Tail Drop

The platform also supports:

• FIP snooping
• IEEE 802.1p remarking
• Layer 2 classification
• WRED congestion avoidance

Data Center Bridging

The EX4650 supports:

• IEEE 802.1Qbb Priority-Based Flow Control
• Data Center Bridging Capability Exchange
• FCoE TLVs
• iSCSI TLVs

High Availability

High-availability capabilities include:

• Bidirectional Forwarding Detection
• Uplink failure detection
• Dynamic Load Balancing

MPLS

Supported MPLS capabilities include:

• Static Label-Switched Paths
• RSVP-signaled LSPs
• LDP-signaled LSPs
• LDP over RSVP
• MPLS Class of Service
• MPLS LSR
• IPv6 tunneling using 6PE
• IPv4 Layer 3 VPN

Server Virtualization and SDN

Supported technologies include:

• VXLAN OVSDB
• EVPN-VXLAN

Management and Analytics

Supported management platforms include:

• Juniper Mist Wired Assurance for Campus
• Junos Space Network Director for Campus
• Junos Space Management

Device Management and Operations

The EX4650 supports:

• Role-based CLI access
• Console CLI
• Telnet
• SSH
• Extended ping
• Traceroute
• OpenConfig and YANG data models
• Junos OS rescue configuration
• Configuration rollback
• Image rollback
• SNMP v1/v2/v3
• Junos XML management protocol
• sFlow v5
• Beacon LEDs
• Zero-Touch Provisioning
• OpenStack Neutron Plug-in
• Python
• Junos OS event scripts
• Commit scripts
• Operational scripts
• Junos Telemetry Interface

Traffic Mirroring

Traffic mirroring options include:

• Port-based mirroring
• LAG-port mirroring
• VLAN-based mirroring
• Filter-based mirroring
• Local mirroring
• Remote Layer 2 over VLAN mirroring

Standards Support

The EX4650 supports networking standards including:

• IEEE 802.1D
• IEEE 802.1w
• IEEE 802.1Q
• IEEE 802.1p
• IEEE 802.1ad
• IEEE 802.3ad
• IEEE 802.1AB
• IEEE 802.3x
• IEEE 802.1Qbb
• IEEE 802.1Qaz
• INCITS T11 FC-BB-5

The platform also supports a broad range of standard RFCs covering technologies such as:

• IP
• TCP
• UDP
• ICMP
• ARP
• DHCP
• RIP
• OSPF
• BGP
• VRRP
• PIM
• IGMP
• RADIUS
• TACACS+
• SNMP
• BFD

EX4650 Platform Specifications

Form Factor

• 1RU

Port Density

• 48 x 10/25GbE
• 8 x 40/100GbE

Switching Capacity

• 2 Tbps unidirectional
• 4 Tbps bidirectional

Latency

Latency can be as low as:

• 550 nanoseconds

Fabric Technologies

The EX4650 supports:

• Virtual Chassis
• MC-LAG
• ESI-LAG
• EVPN-VXLAN

High-Performance Campus Distribution Switching

The Juniper EX4650 Ethernet Switch provides a high-performance platform for enterprise campus distribution and other environments requiring dense 10GbE, 25GbE, 40GbE, and 100GbE connectivity.

With 48 x 10/25GbE ports, 8 x 40/100GbE interfaces, up to 4 Tbps bidirectional switching capacity, four-member Virtual Chassis, EVPN-VXLAN, MC-LAG, ESI-LAG, advanced Layer 2 and Layer 3 capabilities, MPLS, extensive QoS, redundant power and cooling, and Juniper Mist cloud management, the EX4650 provides a scalable foundation for modern enterprise networks.