The only book that takes you from a green CLI prompt to JNCIS-ENT exam-ready — on a real EX4300 with Junos OS 21.4R3. 18 chapters, 7 hands-on labs, and a 60-question mock exam, every command verified against the official Juniper TechLibrary.
One-time purchase · instant access · lifetime updates
Each chapter is built around a working EX4300 with Junos OS 21.4R3. Every CLI block is copy-pasted from a real device and cross-checked against Juniper's TechLibrary. No vendor marketing, no AI-paraphrased filler — just the things you actually configure on the wire.
Ethernet bridging, MAC learning & aging, broadcast/unicast forwarding, switch architecture on the EX4300.
Access/trunk modes, native & voice VLANs, IRB interfaces, inter-VLAN routing, the whole bridge-domain model.
Convergence math, root selection, BPDU mechanics, edge ports, BPDU/loop/root protection, region planning.
Static & LACP aggregation, hashing, redundant trunk groups for non-LACP redundancy, storm control.
MAC limits, persistent learning, MACsec, DHCP snooping, Dynamic ARP Inspection, IP Source Guard.
Graceful Routing Engine Switchover, Non-Stop Routing, Non-Stop Bridging — how Junos keeps the data plane up.
Mastership election, VCP rings, member numbering, line-card mode, ISSU planning — with full deployment walk-through.
Cloud claim, template hierarchy, Marvis SLE-based troubleshooting, day-one deployment for greenfield campuses.
Full simulated JNCIS-ENT switching paper with explanations, weighted to match the official objectives map.
No guesswork on what to study. Every chapter is mapped to one or more JNCIS-ENT switching objectives, and Appendix B gives you the reverse map — pick an objective, jump straight to the chapter section.
Every Layer 2 objective on the official Juniper exam blueprint, demonstrated on a real EX4300.
Every quantitative claim, switch capability, and CLI verb checked against the live Juniper TechLibrary — not blog posts, not training slides, not AI memory.
Front matter and the first three chapters are free to preview. The rest unlocks instantly on purchase.
Each lab gives you the topology, the configuration block, the expected operational output, and the rollback. Run them on real EX4300s, in EVE-NG, or on Juniper vSwitch images.
Three switches, two VLANs, native + voice, full reachability.
Force a topology change & measure convergence with traceoptions.
BPDU guard, root guard, loop protect — deliberately tripped & recovered.
LACP active-active, plus a non-LACP RTG sub-second flip.
Rogue DHCP & ARP poisoning blocked end-to-end.
4-member EX4300 ring, mastership rules, member renumber.
Claim a switch, push template hierarchy, read SLE in Marvis.
20-Q rapid-fire the day before your exam.
Here’s a snippet from Chapter 9 (LAGs & LACP), pulled directly from a working EX4300 with Junos OS 21.4R3:
## Build a 2-port LACP bundle ae0 across ge-0/0/0 and ge-0/0/1 root@ex4300-acc1# set chassis aggregated-devices ethernet device-count 4 root@ex4300-acc1# set interfaces ge-0/0/0 ether-options 802.3ad ae0 root@ex4300-acc1# set interfaces ge-0/0/1 ether-options 802.3ad ae0 root@ex4300-acc1# set interfaces ae0 aggregated-ether-options lacp active periodic fast root@ex4300-acc1# set interfaces ae0 unit 0 family ethernet-switching interface-mode trunk vlan members all root@ex4300-acc1# commit ## Verify — both members should be in 'Distributing/Collecting' root@ex4300-acc1> show lacp interfaces ae0 Aggregated interface: ae0 LACP state: Role Exp Def Dis Col Syn Aggr Timeout Activity ge-0/0/0 Actor No No Yes Yes Yes Yes Fast Active ge-0/0/1 Actor No No Yes Yes Yes Yes Fast Active
Yes. Every chapter is mapped to a JNCIS-ENT switching objective, Appendix B is the reverse map, and Appendix E is a 60-question simulated exam with full explanations weighted to match the official blueprint.
Junos OS 21.4R3 on the EX4300 platform — the long-term-supported release widely deployed in production today. Mist content reflects the current cloud workflow.
The Preface, How-to-Use, About-the-Exam, full Table of Contents, and Chapters 1–3 (Ethernet Bridging, Junos Switching Architecture, VLAN Fundamentals) are free in the in-browser reader. Chapters 4–18 + all five appendices unlock immediately on purchase.
Reading happens in a fast, mobile-friendly in-browser reader at /junos-switching-book/reader.html. There’s no PDF download — this lets us push corrections and exam-blueprint updates instantly. Your access is tied to your CafeTele account.
120 days of access from purchase, including all updates published in that window. Lifetime updates: anything you’ve already unlocked stays unlocked, and major content additions to the same edition are pushed automatically.
Both. The site auto-detects your region and shows the right currency. Razorpay handles UPI, cards, net banking for India, and international cards everywhere else. Prices: ₹1199 / $11.99.
Yes. Every quantitative claim — fabric capacity, queue counts, buffer sizes, timer ranges, default values, CLI verbs — was cross-checked against the live Juniper TechLibrary at write-time. Where a number couldn’t be authoritatively confirmed, the book explicitly says "consult the current datasheet" rather than fabricating a value.
No. Topologies are designed to run on real EX4300s, on EVE-NG with vMX/vQFX/vSRX images for L2 emulation, or on Juniper’s vSwitch images. Each lab note calls out the simulator caveats.
No subscription, no monthly fee, no chapter-drip. Buy it once, read it forever, get every revision for free as Junos and the JNCIS-ENT blueprint evolve.
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