Figure 3: Marvis Actions for wired switches

The complementary addition of Marvis Virtual Network Assistant,

driven by Mist AI, lets you start building a Self-Driving Network that

simplifies network operations and streamlines troubleshooting via

automatic fixes for Juniper Networks EX Series Switches or

recommended actions for external systems.

For more information, see Juniper Mist Wired Assurance.

Campus Fabric Deployments

EVPN-VXLAN for Campus Core, Distribution, and Access

The main advantages of EVPN-VXLAN in campus networks are:

• Flexibility of consistent VLANs across the network: Endpoints

can be placed anywhere in the network and remain connected

to the same logical L2 network, enabling a virtual topology to

be decoupled from the physical topology.

• Microsegmentation: The EVPN-VXLAN-based architecture lets

you deploy a common set of policies and services across

campuses with support for L2 and L3VPNs.

• Scalability: With an EVPN control plane, enterprises can scale

out easily by adding more core, aggregation, and access layer

devices as the business grows without having to redesign the

network or perform a forklift upgrade. Using an L3 IP-based

underlay coupled with an EVPN-VXLAN overlay, campus

network operators can deploy much larger and more resilient

networks than would otherwise be possible with traditional L2

Ethernet-based architectures.

Juniper offers complete flexibility in choosing any of the following

validated EVPN-VXLAN campus fabrics that cater to networks of

different sizes, scale, and segmentation requirements:

EVPN multihoming (on collapsed core or distribution): A collapsed

core architecture combines the core and distribution layers into a

single layer, turning the traditional three-tier hierarchal network into

a two-tier network. EVPN Multihoming on a collapsed core

eliminates the need for Spanning Tree Protocol (STP) across campus

networks by providing link aggregation capabilities from the access

layer to the core layer. This topology is best suited for small to

medium distributed enterprise networks and allows for consistent

VLANs across the network. This topology uses ESI (Ethernet

Segment Identifier) LAG (Link Aggregation) and is a standards-based

protocol.

Campus Fabric Core distribution: When EVPN VXLAN is

configured across core and distribution layers, it becomes a campus

Fabric Core Distribution architecture, which can be configured in

two modes: centrally or edge routed bridging overlay. This

architecture provides an opportunity for an administrator to move

towards campus-fabric IP Clos without fork-lift upgrade of all

access switches in the existing network, while bringing in the

advantages of moving to a campus fabric and providing an easy way

to scale out the network.

Campus Fabric IP Clos: When EVPN VXLAN is configured on all

layers including access, it is called the campus fabric IP Clos

architecture. This model is also referred to as “end-to-end,” given

that VXLAN tunnels are terminated at the access layer. Due to the

availability of VXLAN at access, it provides us with the opportunity

to bring policy enforcement to the access layer (closest to the

source) using Group Based Policy (GBP). Standards-based GBP tags

bring the unique option to segment traffic both at a micro and

macro level. GBP tags are assigned dynamically to clients as part of

Radius transaction by Mist Cloud NAC. This topology works for

small-medium and large campus architectures that need macro and

micro segmentation.

EX4100-F Line of Ethernet Switches Datasheet

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