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JL3V - Junos Layer 3 VPNs

4.6 out of 5 rating

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3 Days

18 CPD hours

About this course

This course benefits individuals responsible for configuring and monitoring devices running the Junos OS.


Describe the value of MPLS VPNs.
Describe the differences between provider-provisioned VPNs and customer-provisioned VPNs.
Describe the differences between Layer 2 VPNs and Layer 3 VPNs.
List the provider-provisioned MPLS VPN features supported by the JUNOS software.
Describe the roles of a CE device, PE router, and P router in a BGP Layer 3 VPN.
Describe the format of the BGP routing information, including VPN-IPv4 addresses and route distinguishers.
Describe the propagation of VPN routing information within an AS.
List the BGP design constraints to enable Layer 3 VPNs within a provider network.
Explain the operation of the Layer 3 VPN data plane within a provider network.
Create a routing instance, assign interfaces to a routing instance, create routes in a routing instance, and import/export routes from a routing instance using route distinguishers/route targets.
Describe the purpose of BGP extended communities, configure extended BGP extended communities, and use BGP extended communities.
List the steps necessary for proper operation of a PE-CE dynamic routing protocol.
List the troubleshooting and monitoring techniques for routing instances.
Explain the difference between the bgp.l3vpn table and the inet.0 table of a routing instance.
Monitor the operation of a CE-PE dynamic routing protocol.
Explain the operation of a PE mulit-access interface in a Layer 3 VPN and list commands to modify that behavior.
Describe ways to support communication between sites attached to a common PE router.
Provision and troubleshoot hub-and-spoke Layer 3 VPNs,
Describe the flow of control traffic and data traffic in a hub-and-spoke Layer 3 VPN.
Describe QoS mechanisms available in L3VPNs.
Configure L3VPN over GRE tunnels.
Describe the RFC 4364 VPN options.
Describe the carrier-of-carriers model.
Configure the carrier-of-carriers and ''Option C'' configuration.
Describe the flow of control and data traffic in a draft-rosen multicast VPN.
Describe the configuration steps for establishing a draft-rosen multicast VPN.
Monitor and verify the operation of draft-rosen multicast VPNs.
Describe the flow of control traffic and data traffic in a next-generation multicast VPN.
Describe the configuration steps for establishing a next-generation multicast VPN.
Describe the configuration steps for establishing a next-generation multicast VPN.
Monitor and verify the operation of next-generation multicast VPNs.


This three-day course is designed to provide students with MPLS-based Layer 3 virtual private network (VPN) knowledge and configuration examples.

Chapter 1: Course Introduction
  • Course Introduction
Chapter 2: MPLS VPNs
  • Provider-Provisioned VPNs
Chapter 3: Layer 3 VPNs
  • Layer 3 VPN Terminology
  • VPN-IPv4 Address Structure
  • Operational Characteristics
Chapter 4: Basic Layer 3 VPN Configuration
  • Preliminary Steps
  • PE Router Configuration
  • Lab: Layer 3 VPN with Static and BGP Routing
Chapter 5: Layer 3 VPN Scaling and Internet Access
  • Scaling Layer 3 VPNs
  • Public Internet Access Options
  • Lab: LDP over RSVP Tunnels and Public Internet Access
Chapter 6: Layer 3 VPNs Advanced Topics
  • Exchanging Routes between Routing Instances
  • Hub-and-Spoke Topologies
  • Layer 3 VPN CoS Options
  • Layer 3 VPN and GRE Tunneling Integration
  • Layer 3 VPN and IPSec Integration
  • Layer 3 VPN Egress Protection
  • BGP prefix-independent convergence (PIC) edge for MPLS VPNs
  • VRF Localization
  • Provider Edge Link Protection
  • Support for configuring more than 3 million L3VPN Labels
  • Lab: GRE Tunneling
Chapter 7: Interprovider Backbones for Layer 3 VPNs
  • Hierarchical VPN Models
  • Carrier-of-Carriers Model
  • Option C Configuration
  • Lab: Carrier of Carrier Layer 3 VPNs
Chapter 8: Troubleshooting Layer 3 VPNs
  • Working with Multiple Layers
  • Troubleshooting Commands on a PE Device
  • Multiaccess Interfaces in Layer 3 VPNs
  • PE and CE-based Traceroutes
  • Layer 3 VPN Monitoring Commands
  • Lab: Troubleshooting Layer 3 VPNs
Chapter 9: Draft Rosen Multicast VPNs
  • Multicast Overview
  • Draft Rosen MVPN Overvie
  • Draft Rosen MVPN Operation
  • Configuration
  • Monitoring
Chapter 10: Next Generation Multicast VPNs
  • Multicast VPN Overview
  • Next-Generation MVPN Operation
  • Configuration
  • Monitoring
  • Internet Multicast
  • Ingress Replication
  • Internet Multicast Signaling and Data Plane
  • Configuring MVPN Internet Multicast
  • Monitoring MVPN Internet Multicast
  • Lab: MVPN Internet Multicast
Additional course details:

Nexus Humans JL3V - Junos Layer 3 VPNs training program is a workshop that presents an invigorating mix of sessions, lessons, and masterclasses meticulously crafted to propel your learning expedition forward.

This immersive bootcamp-style experience boasts interactive lectures, hands-on labs, and collaborative hackathons, all strategically designed to fortify fundamental concepts.

Guided by seasoned coaches, each session offers priceless insights and practical skills crucial for honing your expertise. Whether you're stepping into the realm of professional skills or a seasoned professional, this comprehensive course ensures you're equipped with the knowledge and prowess necessary for success.

While we feel this is the best course for the JL3V - Junos Layer 3 VPNs course and one of our Top 10 we encourage you to read the course outline to make sure it is the right content for you.

Additionally, private sessions, closed classes or dedicated events are available both live online and at our training centres in Dublin and London, as well as at your offices anywhere in the UK, Ireland or across EMEA.

Training Insurance Included!

When you organise training, we understand that there is a risk that some people may fall ill, become unavailable. To mitigate the risk we include training insurance for each delegate enrolled on our public schedule, they are welcome to sit on the same Public class within 6 months at no charge, if the case arises.

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