Arrow Electronics, Inc.

Junos Layer 2 VPNs (JL2V)


LENGTH: 3 day(s)

PRICE: £2,595.00


This two-day course is designed to provide students with the knowledge required to design, implement, and troubleshoot a wide variety of layer 2 MPLS VPNs, including pseudowires (BGP L2VPNs, LDP L2Circuits, FEC 129, and CCC), virtual private LAN service (VPLS), Ethernet VPN (EVPN), and Inter-AS Layer 2 VPNs.

This course is based on Junos 21.2R1 and contains hands-on labs that gives extensive CLI configuration practice as well as many examples of common errors, and the troubleshooting steps required to fix them.

The Junos Layer 2 VPNs (JL2V) is an intermediate to advanced level course.


After successfully completing this course, you should be able to:

• Describe some of the different kinds of VPN, their mechanics, and 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 and troubleshoot BGP-signaled L2VPNs

• Describe how and 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 and fix common L2Circuit problems

• Configure advanced LDP-signaled L2Circuit features

• Discuss the mechanics of FEC 129 pseudowires, which combines BGP for autodiscovery and LDP for signaling

• Describe the purpose and mechanics of a VPLS

• Configure and verify VPLS

• Configure and verify different VPLS VLAN modes

• Describe and configure VPLS advanced features, and VPLS troubleshooting

• Configure advanced VPLS topologies

• Describe the features and advantages of Ethernet VPN

• Configure and verify single-homed EVPN instances

• Explain, configure, and verify EVPN multihoming

• Configure EVPN IRB interfaces, and other advanced EVPN concepts


The primary audiences for this course are the following:

• Individuals responsible for designing, implementing, and 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 exam


The following are the prerequisite skills for this course:

• Strong general TCP/IP knowledge

• Junos knowledge to JNCIA-Junos level

• LDP/RSVP and routing/switching knowledge to JNCIS-SP level

The following are the prerequisite courses that should be completed before attending this course (or

equivalent knowledge):

• Getting Started with Networking (eLearning)

• Introduction to the Junos Operating System (IJOS)

• Junos MPLS Fundamentals (JMF)

• Junos Intermediate Routing (JIR)

• Junos Enterprise Switching (JEX), Junos Service Provider Switching (JSPX), or both



Course Introduction

Refresher: VPNs and MPLS

• IPsec VPNs and MPLS VPNs

• Layer 3 VPNs and layer 2 VPNs

The Different Flavors of Layer 2 VPN

• Discuss the function and creation of pseudowires

• Discuss the function and creation of VPLS

• Discuss the function and creation of EVPN

L2VPN aka BGP-Signaled Pseudowires

• Define some essential L2VPN terminology

• Explore the control plane and data plane of an L2VPN

• Observe an L2VPN packet capture

L2VPN Configuration and Troubleshooting

• Configure an L2VPN which accepts all Ethernet traffic

• Configure an L2VPN which accepts specific VLAN tags

• Troubleshoot common L2VPN problems

L2VPN—Site IDs, The Label Base, and Overprovisioning

• The Site ID and the VPN label

• Overprovisioned L2VPN configuration

Lab 1: BGP-Signaled L2VPNs

L2VPN Advanced Concepts

• Configure and verify multihoming

• Explain Martini encapsulation and VLAN normalization

• Configure traffic policing, out-of-band route reflection, and route target constraint

Lab 2: L2VPNs—Advanced Concepts

L2Circuit, aka L2DP-Signalled Pseudowires

• Configure and verify an L2Circuit

• Analyze a packet capture of an LDP advertisement


• Configure the Pseudowire Status TLV

• Observe the most frequent L2Circuit error statuses

L2Circuit—Advanced Concepts

• Enable Virtual Circuit Connectivity Verification

• Configure multihoming, local switching, and interworking

Lab 3: LDP-Signaled L2Circuits


FEC 129 Pseudowires

• Discuss the mechanics of FEC 129

• Configure and verify a FEC 129 pseudowire

Lab 4: FEC 129 Pseudowires (Optional)

Virtual Private LAN Service—Introduction

• Explain how VPLS forwards traffic between multiple sites

• Describe the three methods of signaling VPLS

VPLS—Configuration and Verification

• Configure a BGP-signaled VPLS

• Verify a BGP-signaled VPLS

• Configure and verify an LDP-signaled VPLS

• Configure and verify a FEC 129 VPLS

VPLS—The Four Modes of MAC Learning

• Configure and verify the default VLAN mode and VLAN-Aware mode

• Configure and verify VLAN-Normalizing mode and No-VLAN mode

• Configure and verify dual-stacked VLAN tags in VPLS

VPLS—Advanced Features and Troubleshooting

• Configure protection and MAC limiting in a VPLS

• Add IRB interfaces to VPLS instances, and configure efficient traffic flooding

• Describe VPLS-specific troubleshooting techniques

VPLS—Advanced Topologies

• Configure hub-and-spoke VPLS

• Configure multihomed sites in a VPLS

Lab 5: VPLS


• Describe the advantages of EVPN over VPLS

• Explain the structure and purpose of EVPN route Type 2 and Type 3

EVPN—Single-Homed Configuration

• Configure and verify a VLAN-Based EVI

• Configure and verify a VLAN-aware bundle EVI


• Describe Type 4 Ethernet Segment routes, and configure multihoming

• Describe Type 1 Ethernet Autodiscovery routes

EVPN—Advanced Concepts and Troubleshooting

• Configure and verify Automatic Gateway MAC-IP Synchronization

• Describe host routes in an L3VPN

• Configure alternative IRB methods

• Configure advanced EVPN features and mechanics

Lab: 6: EVPN

The following Appendices can be covered, if time permits, and are requested by the delegate/s prior to booking:

Appendix A: Inter-AS L2VPNs (Optional)

Appendix B: Circuit Cross-Connect (Optional)

Follow on courses

Recommended Next Courses

• Advanced Junos Service Provider Routing (AJSPR)
• Junos Layer 3 VPN (JL3V) 
• Junos Class of Service (JCOS)
• Junos Multicast Routing (JMR)
• JNCIE-SP Bootcamp

Test and Certification

Associated Certification


Session Dates
Time Zone

20 Mar 2023

Virtual Training Class - TP



Instructor Led Online

£ 2,595.00