When more than two switches are interconnected in a Virtual

Chassis configuration, the remaining switch elements act as line

cards and are available to assume the backup RE position should

the designated primary RE fail. Primary, backup, and line card

priority status can be assigned to dictate the order of ascension;

this N+1 RE redundancy, coupled with the GRES, nonstop active

routing (NSR), and nonstop bridging (NSB) capabilities of Junos OS,

assures a smooth transfer of control plane functions following

unexpected failures.

The EX4100-F implements the same slot/module/port numbering

schema as other Juniper chassis-based products when numbering

Virtual Chassis ports, providing true chassis-like operations. By

using a consistent operating system and a single configuration file,

all switches in a Virtual Chassis configuration are treated as a single

device, greatly simplifying overall system maintenance and

management.

Individually, the EX4100-F offers a number of HA features that are

typically associated with modular chassis-based switches. When

combined with the field-proven Junos OS and L2/L3 failover

capabilities, these features provide the EX4100-F with true carrier-

class reliability.

• Nonstop bridging and nonstop active routing: NSB and NSR

on the EX4100-F ensure that control plane protocols, states,

and tables are synchronized between primary and standby REs

to prevent protocol flaps or convergence issues following an

RE failover.

• Redundant trunk group (RTG): To avoid the complexities of

STP without sacrificing network resiliency, the EX4100-F

employs redundant trunk groups to provide the necessary port

redundancy and simplify switch configuration.

• Cross-member link aggregation: Cross-member link

aggregation allows redundant link aggregation connections

between devices in a single Virtual Chassis configuration,

providing an additional level of reliability and availability.

• IPv4 and IPv6 routing support: IPv4 and IPv6 Layer 3 routing

(OSPF and BGP) is available with a Flex license, enabling highly

resilient networks.

PoE/PoE+ Power, Perpetual and Fast PoE

The EX4100-F delivers PoE for supporting connected devices such

as phones, surveillance cameras, IoT devices, and 802.11AX/Wi-Fi

6 access points, offering a PoE power budget of up to 740 W and

supporting up to 30 W per port based on the IEEE 802.3at PoE

standard.

EX4100-F switches support perpetual PoE, which provides

uninterrupted power to connected PoE powered devices (PDs)

even when the power sourcing equipment switch (PSE) is

rebooting.

The EX4100-F switches also support a Fast PoE capability

that delivers PoE power to connected endpoints during a switch

power-up, even before the switch is fully operational. This is

especially beneficial in situations where the endpoint only needs

the power and is not necessarily dependent on network

connectivity.

Junos Telemetry Interface

The EX4100-F supports Junos telemetry interface (JTI), a modern

telemetry streaming feature designed for switch health and

performance monitoring. Sensor data can be streamed to a

management system at configurable periodic intervals, enabling

network administrators to monitor individual link and node

utilization as well as troubleshoot issues such as network

congestion in real time. JTI delivers the following features:

• Performance management by provisioning sensors to collect

and stream data and analyze application and workload flow

paths through the network

• Capacity planning and optimization by proactively detecting

hotspots and monitoring latency and microbursts

• Troubleshooting and root cause analysis via high-frequency

monitoring and correlation of overlay and underlay networks

Junos Operating System

The EX4100-F switches run Junos OS, Juniper’s powerful and

robust network operating system that powers all Juniper switches,

routers, and firewalls. By utilizing a common operating system,

Juniper delivers a consistent implementation and operation of

control plane features across all products. To maintain that

consistency, Junos OS adheres to a highly disciplined development

process that uses a single source code and employs a highly

available modular architecture to prevent isolated failures from

bringing down an entire system.

These attributes are fundamental to the core value of the software,

enabling all Junos OS-powered products to be updated

simultaneously with the same software release. All features are fully

regression tested, making each new release a true superset of the

previous version. Customers can deploy the software with

complete confidence that all existing capabilities are maintained and

operate in the same way.

EX4100-F Line of Ethernet Switches Datasheet

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