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Junos Layer 2 VPNs


(Normal) The purpose of this three-day course is to equip students with the skills necessary to design, implement, and troubleshoot a variety of layer 2 MPLS VPNs, including pseudo wires (BGP L2VPNs, LDP L2Circuits, FEC 129, & CCC), virtual private LAN service (VPLS), and Ethernet VPN (EVPN). The hands-on labs in this course, which is based on Junos 21.2R1, provide extensive practice with CLI configuration, numerous examples of common errors, and the troubleshooting steps necessary to fix them.

Duration: 3 Days (24 Hours)

Learning Objectives:

After completing this course, professionals should be able to:

  •  Explain some of the different kinds of VPNs, their mechanics, & their use cases.
  •  Discuss the types of MPLS VPN which operate at layer 2.
  •  Discuss the mechanics of BGP-signaled pseudowires, also known as a Layer 2 VPN (L2VPN).
  •  Configure & troubleshoot BGP-signaled L2VPNs.
  •  Explain how & why L2VPNs advertise a range of labels.
  •  Configure advanced BGP-signaled L2VPN features.
  •  Discuss the mechanics of LDP-signaled pseudowires, also known as a Layer 2 Circuit (L2Circuit).
  •  Identify & fix common L2Circuit problems.
  •  Configure advanced LDP-signaled L2Circuit features.
  •  Discuss the mechanics of FEC 129 pseudowires, which combines BGP for autodiscovery & LDP for signaling.
  •  Explain the purpose & mechanics of a VPLS.
  •  Configure & verify VPLS.
  •  Configure & verify different VPLS VLAN modes.
  •  Explain & configure VPLS advanced features, & VPLS troubleshooting.
  •  Configure advanced VPLS topologies.
  •  Explain the features & advantages of Ethernet VPN.
  •  Configure & verify single-homed EVPN instances.
  •  Explain, configure, & verify EVPN multihoming.
  •  Configure EVPN IRB interfaces, & other advanced EVPN concepts.

The prerequisite skills for this course include the following:

  •  Strong general TCP/IP knowledge
  •  Juno's knowledge of the JNCIA-Junos certification level
  •  LDP/RSVP & routing/switching knowledge to
  •  the JNCIS-SP certification level

Audience Profile

  •  Individuals responsible for designing, applying, & troubleshooting MPLS VPNs which operate at layer 2
  •  Individuals who work with, or who aspire to work with, service provider networks
  •  Individuals studying for the JNCIP-SP or JNCIE-SP certification exam

Module 1: Course Introduction

Module 2: Refresher: VPNs & MPLS


  •  IPsec VPNs & MPLS VPNs
  •  Layer 3 VPNs & layer 2 VPNs

Module 3: The Different Flavors of Layer 2 VPN


  •  Discuss the function & creation of pseudowires
  •  Discuss the function & creation of VPLS
  •  Discuss the function & creation of EVPN

Module 4: L2VPN aka BGP-Signaled Pseudo wires


  • Define some essential L2VPN terminology
  •  Explore the control plane & data plane of an L2VPN
  •  Observe an L2VPN packet capture

Module 5: L2VPN Configuration & Troubleshooting


  •  Configure an L2VPN that accepts all Ethernet traffic
  •  Configure an L2VPN that accepts specific VLAN tags
  •  Troubleshoot common L2VPN problems

Module 6: L2VPN—Site IDs, The Label Base, & Overprovisioning


  • The Site ID & the VPN label
  •  Overprovisioned L2VPN configuration


  •  BGP-Signaled L2VPNs

Module 7: L2VPN Advanced Concepts


  •  Configure & verify multihoming
  •  Explain Martini encapsulation & VLAN normalization
  •  Configure traffic policing, out-of-b& route reflection, &
  •  route target constraint


  •  L2VPNs—Advanced Concepts

Module 8: L2Circuit, aka L2DP-Signalled Pseudo wires


  •  Configure & verify an L2Circuit
  •  Analyze a packet capture of an LDP advertisement

Module 9: L2Circuit—Troubleshooting


  •  Configure the Pseudo wire Status TLV
  •  Observe the most frequent L2Circuit error statuses

Module 10: L2Circuit—Advanced Concepts


  •  Enable Virtual Circuit Connectivity Verification
  •  Configure multihoming, local switching, & interworking


  •  LDP-Signaled L2Circuits

Module 11: FEC 129 Pseudowires


  •  Discuss the mechanics of FEC 129
  •  Configure & verify an FEC 129 pseudowire

Module 12: Virtual Private LAN Service—Introduction


  • Explain how VPLS forwards traffic between multiple sites
  •  Explain the three methods of signaling VPLS

Module 13: VPLS—Configuration & Verification


  •  Configure a BGP-signaled VPLS
  •  Verify a BGP-signaled VPLS
  •  Configure & verify an LDP-signaled VPLS
  •  Configure & verify an FEC 129 VPLS

Module 14: VPLS—The Four Modes of MAC Learning


  •  Configure & verify the default VLAN mode & VLAN-Aware mode
  •  Configure & verify VLAN-Normalizing mode & No-VLAN mode
  •  Configure & verify dual-stacked VLAN tags in VPL

Module 15:VPLS—Advanced Features & Troubleshooting


  • Configure protection & MAC limiting in a VPLS
  •  Add IRB interfaces to VPLS instances, & configure efficient traffic flooding
  •  Explain VPLS-specific troubleshooting techniques

Module 16: VPLS—Advanced Topologies


  •  Configure hub-&-spoke VPLS
  •  Configure multihomed sites in a VPLS


  • VPLS

Module 17: EVPN—Introduction


  •  Explain the advantages of EVPN over VPLS
  •  Explain the structure & purpose of EVPN route Type 2 & Type 3

Module 18: EVPN—Single-Homed Configuration


  •  Configure & verify a VLAN-Based EVI
  •  Configure & verify a VLAN-aware bundle EVI

Module 19: EVPN—Multihoming


  •  Explain Type 4 Ethernet Segment routes, & configure multihoming
  •  Explain Type 1 Ethernet Autodiscovery routes

Module 20: EVPN—Multihoming


  • Configure & verify Automatic Gateway MAC-IP Synchronization
  •  Explain host routes in an L3VPN
  •  Configure alternative IRB methods
  •  Configure advanced EVPN features & mechanics

Module A: Appendix: Inter-AS L2VPNs (Optional)

Module B: Appendix: Circuit Cross-Connect (Optional)

JNCIP-SP certification exam

Skills measured

  •  Protocol-Independent Routing
  •  Open Shortest Path First (OSPF)
  •  Intermediate System to Intermediate System (IS-IS)
  •  Border Gateway Protocol (BGP)
  •  Layer 2 Bridging or VLANs
  •  Spanning-Tree Protocols
  •  Multiprotocol Label Switching (MPLS)
  •  IPv6
  •  Tunnels
  •  High Availability

Q: What is enterprise switching? 

A: This means the enterprise network has a great core switch, with additional distribution layer switches which generally operate below it to bring all the information into the data center & after that, disseminate it out to the access layer where the end users are located & there is fewer data traffic. 

Q: Is a router the switch?

A: switch connects several devices to create a network, and a router connects multiple switches, & their respective networks to form an even more extensive network. These networks may be in various locations or across multiple sites.

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 participants' hands-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 in 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.