JNCIE-ENT study guide
JNCIE-ENT · Work through your exam, one topic at a time.
JNCIE-ENT (exam code JPR-946) is the expert-level certification in the enterprise routing and switching track, positioned by Juniper as the pinnacle of that four-step path from JNCIA-Junos through JNCIS-ENT and JNCIP-ENT. It targets engineers who already hold JNCIP-ENT and can deploy, configure, manage and troubleshoot Junos-based enterprise routing and switching platforms without hand-holding. The exam is a six-hour hands-on lab: you build an enterprise network infrastructure of multiple routers and switching devices, perform system configuration on all of them, and configure protocols and features including IGPs, BGP, EVPN, Layer 2 features, routing policies and class of service. It is delivered by Juniper Networks in English only, and the published lab environment runs vEX Virtual Switch 25.2R1, vSRX Virtual Firewall 25.2R1 and vMX Virtual Router 23.2R2. The JNCIE-ENT study guide has 5 sections and about 1,681 words.
01System Management and Monitoring
This domain tests operational control of Junos devices: configuration lifecycle, commit safety, logging, telemetry, and health checks. JNCIE-ENT expects procedures that survive a mistake or a Routing Engine switchover, not just commands that work once.
321 words, about 2 min02Layer 2 Switching and Features
This domain covers Junos Ethernet switching: VLAN membership, trunking, spanning tree, link aggregation, loop protection, and Layer 2 security. The exam tests whether you can keep a switched topology stable while adding services and multi-vendor attachments.
343 words, about 2 min03Layer 3 Switching and Features
This domain tests routed services on a switch: IRB interfaces, first-hop redundancy, dynamic routing, filtering, and fast failure detection. The focus is on correct forwarding and predictable failover, not just bringing up an adjacency.
348 words, about 2 min04EVPN and Services
This domain tests EVPN control-plane and VXLAN data-plane design: route types, VNI and route-target consistency, anycast gateways, and Ethernet segment multihoming. The exam expects you to explain why a MAC or prefix is or is not advertised.
339 words, about 2 min05Class of Service (CoS)
This domain tests how Junos classifies, queues, schedules, and marks traffic. JNCIE-ENT expects a complete path: classify on ingress, assign a forwarding class and loss priority, schedule the queue, drop with a profile, and rewrite on egress.
330 words, about 2 min