Junos Layer 3 VPNs

Individuals responsible for configuring and monitoring devices running Junos OS

• Describe the purpose and functions of MPLS VPNs.

• Describe the differences between Layer 2 VPNs (L2VPNs) and Layer 3 VPNs (L3VPNs).

• Describe the roles of a customer edge (CE) device, provider edge (PE) router, and provider (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 autonomous system (AS).

• List the BGP design constraints to enable L3VPNs within a provider network.

• Explain the operation of the L3VPN 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 BGP extended communities, and use BGP extended communities.

• List the steps necessary for the 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.

• Describe ways to support communication between sites attached to a common PE router.

• Provision and troubleshoot hub-and-spoke L3VPNs.

• Describe the flow of control traffic and data traffic in a hub-and-spoke L3VPN.

• Describe the quality of service (QoS) mechanisms available in L3VPNs.

• Describe seamless MPLS fundamentals.

• Describe the carrier-of-carriers model.

• Configure the carrier-of-carriers and “Option C” configuration.

• Describe the flow of control traffic and data traffic in BGP MVPN.

• Describe the configuration steps for establishing a BGP MVPN.

• Monitor and verify the operations of BGP MVPNs.

• Describe the flow of control traffic and data traffic when using BGP MPVNs for Internet multicast.

• Describe the configuration steps for enabling Internet multicast using BGP MVPNs.

• Monitor and verify the operation of BGP MVPN Internet multicast

1ER JOUR

Course Introduction

Refresher—VPNs and MPLS

• • Contrast the differences between IPsec VPNs and MPLS VPNs
• • Contrast the differences between L3VPNs and L2VPNs

Layer 3 VPNs–Overview

• • Explain L3VPN terminology
• • Define the VPN-IPv4 address structure

Layer 3 VPNs—Operational Characteristics

• • Explain how the L3VPN control plane advertises VPN-IPv4 prefixes across a service provider network
• • Explain how the L3VPN data plane transports traffic between sites, across a service provider's core

Layer 3 VPN—Configuration

• • Describe the preliminary steps needed for configuring an L3VPN
• • Describe the L3VPN PE configuration
• Lab 1: Layer 3 VPNs with Static and BGP Routing

Layer 3 VPN—Verification

• • Describe how to verify L3VPN operations
• Lab 2: Route Redistribution

OSPF as the PE-to-CE Protocol

• • Configure and verify a basic L3VPN deployment, with OSPF to the CE router
• • Explain the purpose of the BGP route type community and the domain ID

OSPF—Optimal Routing

• • Explain and verify the use of the DN bit and the VPN route tag, which prevent control plane loops
• • Configure and verify sham links to control routing decisions in networks with backdoor links

Route Leaking

Hub-and-Spoke Topologies

2EME JOUR

Layer 3 VPN CoS : Describe how to configure and use CoS with L3VPNs

Layer 3 VPN Protection Mechanisms

• • Explain how BGP PIC edge works
• • Define how provider edge link protection functions

Layer 3 VPN Scaling

• • Describe different ways to improve L3VPN scaling
• • Define L3VPN scaling guidelines

BGP Route Target Filtering  

Lab 3: Additional L3VPN Scalability Techniques

Layer 3 VPNs and Internet Access

• • Explain the differences between the methods of providing Internet access within an L3VPN environment
• • Demonstrate how to configure VRF Internet access with a single connection through a use case

Inter-AS Layer 3 VPNs

• • Describe the functionality of Interprovider Options A, B, and C
• • Configure and verify the Interprovider Option C method

Carrier-of-Carriers VPNs

Lab 4: Carrier-of-Carriers VPNs

3EME JOUR

Troubleshooting Layer 3 VPN—Overview

• • Explain basic L3VPN troubleshooting steps
• • Define PE-to-CE verification methods

Additional Layer 3 VPN Troubleshooting

• • Explain how to troubleshoot MPLS-related problems in an L3VPN
• • Explain how to troubleshoot BGP-related problems in an L3VPN
• • Demonstrate how to troubleshoot forwarding plane related problems in an L3VPN
• • Describe troubleshooting an L3VPN with a use case

Lab 5: Troubleshooting L3VPNs

Multicast Overview

• • Describe IP multicast traffic flow and multicast components
• • Describe multicast addressing
• • Describe the need for RPF check in multicast networks
• • Describe multicast routing tables

Introduction to IGMP

• • Explain the role of IGMP
• • Describe the different versions of IGMP

Multicast Routing Protocols

• • Discuss multicast routing
• • Describe the different PIM messages

BGP MVPN Overview

• • Describe the overall functionality of BGP MVPNs
• • Explain how BGP MVPNs operate

Configuring BGP MVPNs

• • Explain the configuration steps of BGP MVPNs
• • Describe how to verify that a BGP MVPN is correctly working

Lab 6: MVPNs

• Intermediate-level networking knowledge and an understanding of OSPF, IS-IS, BGP, and Junos policy

• Experience configuring MPLS label-switched paths using Junos

• Completion of the Introduction to the Junos Operating System, Junos Intermediate Routing, and the Junos MPLS Fundamentals courses

Pré-requis recommandés :

• JL2V - Junos Layer 2 VPNs
• JMF - Junos MPLS Fundamentals