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Junos Enterprise Switching


This two-day course is designed to provide students with intermediate switching knowledge & configuration examples using Junos Enhanced Layer 2 Software (ELS). This course includes an overview of switching concepts & operations, VLANs, the Rapid Spanning Tree Protocol (RSTP), port & device security features, & high availability (HA) features. Through demonstrations & hands-on labs, students will gain experience in configuring & monitoring the Junos operating system (OS) & in monitoring device operations. This course uses Juniper Networks EX4300 Series Ethernet switches for the hands-on components. Still, the lab environment does not preclude the system from applying to other Juniper hardware platforms running Junos OS. This training is based on Junos OS Release 21.4R1.12.

Duration: 2 Days (16 Hours) 

Learning Objectives: 

  • List the benefits of applying switched LANs.
  • Explain transparent bridging concepts & operations.
  • Explain terms & design considerations for switched LANs.
  • List enterprise platforms that support Layer 2 switching.
  • Configure interfaces for Layer 2 switching operations.
  • Display & interpret the Ethernet switching table.
  • Explain the concept of a VLAN.
  • Explain access & trunk port modes.
  • Configure & monitor VLANs.
  • Explain voice VLAN & native VLAN concepts.
  • Explain inter-VLAN routing operations.
  • Configure & monitor inter-VLAN routing.
  • Explain when a spanning tree is required.
  • Explain STP & Rapid Spanning Tree Protocol (RSTP) operations.
  • List some advantages of using RSTP over STP.
  • Configure & monitor RSTP.
  • Explain the bridge protocol data unit (BPDU), loop, & root protection features.
  • Configure & monitor the BPDU, loop, & root protection features.
  • List & explain various port security features.
  • Configure & monitor port security features.
  • Explain the storm control feature.
  • Configure & monitor storm control.
  • Explain firewall filter support for EX Series Ethernet switches.
  • Apply & monitor the effects of a firewall filter.
  • List & explain some features that promote high availability.
  • Configure & monitor high-availability features.
  • Explain the basic concepts & operational details of a virtual chassis.
  • Apply a virtual chassis with multiple EX4300 switches.
  • Explain the concepts of Multiple Spanning Tree Protocol (MSTP).
  • Configure & monitor MSTP.
  • Discover, configure, & troubleshoot EX Series switches using Junos Space
  • Network Director.
  • Basic networking knowledge & an understanding of the Open Systems Interconnection (OSI) reference model & the TCP/IP protocol suite 
  • Complete the Introduction to the Junos Operating System (IJOS) course, or equivalent knowledge

Audience Profile

Individuals responsible for configuring & monitoring EX Series switches running Junos Enhanced Layer 2 Software (ELS)

Module 1: Course Introduction

Module 2: Layer 2 Switching


  • Explain Ethernet bridging basic 
  • Configure & monitor Layer 2 switching operations


  • Applying Layer 2 Switching

Module 3: Switching Design Considerations


  • Explain switching terminologies & design considerations
  • Explain various Enterprise Switching platforms

Module 4: Apply VLANs


  • Define VLANs
  • Create VLANs
  • Monitor VLANs

Module 5: Filter-Based Forwarding


  • Explain voice LAN concepts & operations
  • Explain native LAN concepts & operations
  • Explain & apply IRB interfaces


  • Applying Virtual Networks

Module 6: Spanning Tree Overview


  • Explain the operations of STP 
  • Explain the operations of RSTP

Module 7: Deploy Spanning Tree


  • Configure STP & RSTP 
  • Monitor STP & RSTP

Module 8: Spanning Tree Protection Features


  • Explain & configure BPDU protection on spanning tree
  • Explain & configure loop protection on spanning tree
  • Explain & configure root protection on spanning tree


  • Applying Spanning Tree

Module 9: LAGs & RTGs


  • Explain link aggregation groups (LAGs) & redundant trunk groups (RTGs
  • Configure & monitor LAG & RTG


  • Applying LAGs & RTGs

Module 10: Storm Control


  • Explain storm control features
  • Configure & monitor storm control features

Module 11: Layer 2 Firewall Filters


  • Explain firewall filter support for EX Series switches
  • Apply & monitor the effects of a firewall filter


  • Apply & monitor the effects of a firewall filter

Module 12: Port Security—MAC Limiting, MAC Learning, & MACsec


  • Explain MAC limiting, MAC learning, & MACsec 
  • Configure MAC limiting, MAC learning, & MACsec 
  • Monitor MAC limiting, MAC learning, & MACsec

Module 13: Port Security—DHCP Snooping, Dynamic ARP Inspection, & IP Source Guard


  • Explain DHCP snooping, dynamic ARP inspection, & IP source guard 
  • Configure DHCP snooping, dynamic ARP inspection, & IP source guard 
  • Configure DHCP snooping, dynamic ARP inspection, & IP source guard


  • Applying Port Security 

Module 14: High Availability—GRES, NSR, & NSB


  • Overview of high-availability networks
  • Explain graceful Routing Engine switchover


  • Explain nonstop active routing (NSR)
  • Explain nonstop bridging (NSB)

Module 15: Virtual Chassis


  • Explain the operational details of the Virtual Chassis
  • Apply Virtual Chassis & verify its operation

Module 16: Deploy Virtual Chassis


  • Configure & monitor Virtual Chassis


  • Applying Virtual Chassis Systems

Module A: Appendix: Junos Space Network Director


  • Explain Junos Space Network Director
  • Configure Junos Space Network Director

Module B: Appendix: MSTP


  • Explain the operations of MSTP
  • Configure & verify MSTP

Module C: Appendix: Mist Integration with EX Series Switches


  • Explain mist solution & supported devices
  • Explain provisioning & deployment process

Module D: Appendix: Mist Wired Assurance


  • Explain the deployment options
  • Explain wired assurance SLE & their classifiers
  • Explain the role of Mist within campus & branch
  • architecture

Module E: Appendix: ELS & Non-ELS Configuration


  • Configure switching options
  • Understand IRB & RVI interfaces & its
  • configuration
  • Explain Q-in-Q VLAN tagging

Skills measured

  • Layer 2 Switching or VLANs
  • Spanning Tree
  • Layer 2 Security
  • Protocol Independent Routing
  • OSPF
  • IS-IS
  • BGP
  • Tunnels
  • High Availability

Certification Path

Required exams: JNCIS-ENT certification exam

Q: What background knowledge is necessary?


  • Basic understanding of the OSI model & the TCP/IP protocol suite.  
  • Basic understanding of computer networking concepts. 

Q: Do I need to take the courses in a specific order?

A: Yes, taking the courses in order is recommended.

Q: What is Juno's Operating System?

A: Juniper Networks provides high-performance network devices that create a responsive & trusted environment for accelerating the deployment of services & applications over a single network. The Junos operating system (Junos OS) is the foundation of these high-performance networks.

Q: What is the infrastructure required to attend your training program?

A: To attend the training session, you should have operational Desktops or Laptops with the required specification and a good internet connection to access the labs. 

Q: What if I miss a class on a particular day?

A: We would always recommend you attend the live session to practice & clarify the doubts instantly & get more value from your investment. However, if, due to some contingency, you have to skip the class, Radiant Techlearning will help you with the recorded session of that particular day. However, those recorded sessions are not meant only for personal consumption & NOT for distribution or commercial use.

Q: How will I be accessing the labs?

A: Radiant Techlearning has a data center containing a Virtual Training environment for participant hand-on-practice. Participants can easily access these labs over Cloud with the help of a remote desktop connection. Radiant virtual labs allow you to learn from anywhere in the world & in any time zone. 

Q: What kind of projects are included as a part of training?

A: The learners will be enthralled as we engage them the real-world & industry Oriented projects during the training program. These projects will improve your skills & knowledge & you will gain a better experience. These real-time projects will help you a lot in your future tasks & assignments.