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Junos Layer 2 VPNs

  • Référence JL2V
  • Durée 2 jour(s)
  • Version 21.x

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EUR2 610,00

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This three-day course is designed to provide students with the knowledge to configure and troubleshoot MPLS-based Layer 2 virtual private networks (VPN).

The course includes an overview of MPLS Layer 2 VPN concepts, such as BGP Layer 2 VPNs, LDP Layer 2 circuits, forwarding equivalence class (FEC) 129, virtual private LAN service (VPLS), Ethernet VPN (EVPN), and Inter-AS MPLS VPNs.

This course also covers Junos OS-specific implementations of Layer 2 VPN instances, VPLS, and EVPNs.

This course is based on the Junos OS Release 21.4R1.12.

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

[Formation délivrée en anglais par Juniper]

Mise à jour : 07.03.2023

Prochaines dates

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Individuals responsible for configuring and monitoring devices running the Junos OS in a service provider environment, in MPLS-based data centers, and in larger enterprises

Objectifs de la formation

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  • · Describe some of the different kinds of VPNs, their mechanics, and their use cases.
  • · Describe the types of MPLS VPN that operate at layer 2.
  • · Describe the mechanics of BGP-signaled pseudowires, also known as L2VPNs.
  • · Configure BGP-signaled L2VPNs with Ethernet and Ethernet-VLAN encapsulations.
  • · Demonstrate how to troubleshoot some of the most common BGP-signaled L2VPN configuration problems.
  • · Describe how BGP-signaled L2VPNs use a block of labels to bring efficiency to huband-spoke advertisements.
  • · Configure advanced BGP-signaled L2VPN features, such as multihoming, VLAN normalization, and route target constraint.
  • · Describe the mechanics of LDP-signaled pseudowires, also known as Layer 2 Circuits.
  • · Describe the causes and solutions of some of the most common L2Circuit configuration problems.
  • · Configure advanced LDP-signaled L2Circuit features, such as multihoming and local switching.
  • · Explain how the FEC 129 pseudowire method combines BGP for autodiscovery and LDP for signaling.
  • · Describe the purpose and mechanics of a VPLS.
  • · Create a VPLS instance that is signaled using BGP and demonstrate the commands that verify its status.
  • · Create VPLS instances that are signaled using LDP and FEC 129 and demonstrate the commands available to verify their status.
  • · Describe how mismatched VLAN tags are handled in a default VPLS configuration.
  • · Configure a VPLS to swap mismatched VLAN tags automatically, and to create multiple bridge domains inside a single VPLS instance.
  • · Configure the most important VPLS traffic management features, including flood protection, MAC limiting, IRB interfaces, and automated Site IDs.
  • · Configure hub-and-spoke VPLS topologies.
  • · Configure multihomed sites in a VPLS.
  • · Describe the features of Ethernet VPN, and the enhancements that EVPN brings over VPLS.
  • · Explain how EVPNs advertise MAC addresses, and how they request to receive flooded traffic within a bridge domain.
  • · Configure and verify a single-homed VLAN-based EVPN instance.
  • · Configure and verify a single-homed VLAN-aware bundle EVI.
  • · Configure a multihomed EVPN and explain the purpose of the EVPN Type 4 route.
  • · Describe the features provided by EVPN Type 1 routes.
  • · Describe how to use MAC Mobility and IRB interfaces in an EVPN.
  • · Explain how EVPNs can tightly integrate themselves into MPLS Layer 3 VPNs to provide highly efficient forwarding.
  • · Describe and configure various solutions that create MPLS VPNs between service providers.
  • · Describe the circuit-cross connect pseudowire method and explain how this old method can still have value in modern networks.
  • · Describe how multisegment pseudowires can create layer 2 VPNs across autonomous system boundaries.

Programme détaillé

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1ER JOUR

Course Introduction

Refresher—VPNs and MPLS  

  • · Explain the basic function and purpose of a VPN
  • · Describe how MPLS uses labels to forward traffic
  • · Explain the differences between MPLS layer 3 VPNs and MPLS layer 2 VPNs

The Different Flavors of Layer 2 VPN

  • · Describe the purpose and creation of pseudowires
  • · Define the different technical terms relating to pseudowires
  • · Describe the purpose and creation of VPLS
  • · Describe the purpose, creation, and advantages of EVPN

L2VPN, aka BGP‐Signaled Pseudowires

  • · Define the concept of an attachment circuit, and of pseudowire encapsulation
  • · Explain the importance of route targets, route distinguishers, and Site IDs
  • · Explain the control plane and data plane of an L2VPN
  • · Describe the contents of an L2VPN BGP packet capture

L2VPN—Configuration

  • · Configure an L2VPN that accepts all Ethernet traffic
  • · Configure an L2VPN that accepts specific VLAN tags

L2VPN—Troubleshooting

  • · Diagnose and fix L2VPN problems caused by missing LSPs, mismatched site information, and incorrect configuration

L2VPN—Site IDs, the Label Base, and Overprovisioning

  • · Explain the purpose of the Site ID and the VPN label base
  • · Configure an overprovisioned L2VPN with explicit remote Site IDs
  • · Configure an overprovisioned L2VPN with implicit remote Site IDs
  • · Lab 1: BGP-Signaled Layer 2 VPNs

L2VPN—Advanced Concepts

  • · Configure and verify L2VPN multihoming
  • · Explain the purpose of Martini encapsulation
  • · Configure VLAN normalization in an L2VPN
  • · Configure out-of-band route reflection and route target constraint
  • Lab 2: L2VPNs—Advanced Concepts

L2Circuit—LDP‐Signaled Pseudowires

  • · Explain the concept of targeted LDP sessions, and the elements that L2Circuits have in common with L2VPNs
  • · Configure and verify an L2Circuit
  • · Describe the contents of an LDP advertisement packet capture

L2Circuit—Troubleshooting

  • · Configure the Pseudowire Status TLV
  • · Explain the meaning of the most frequent L2Circuit error codes

2EME JOUR

L2Circuit—Advanced Concepts

  • · Describe the purpose and benefits of virtual circuit connectivity verification
  • · Configure multihoming, local switching, and interworking
  • Lab 3: LDP‐Signaled L2Circuits

FEC 129 Pseudowires

  • · Explain the way that FEC 129 autodiscovers remote PEs and signals pseudowires
  • · Configure and verify a FEC 129 pseudowire
  • Lab 4: FEC 129 Pseudowires (Optional)

Virtual Private LAN Service—Introduction

  • · Describe how a VPLS is built, and how it compares to a regular pseudowire
  • · Explain how VPLS forwards traffic between multiple sites
  • · Describe the BGP and LDP methods of signaling a VPLS

VPLS—LDP and FEC 129 Configuration and Verification

  • · Configure and verify an LDP-signaled VPLS
  • · Configure and verify a FEC 129 VPLS

VPLS—LDP and FEC 129 Configuration and Verification

  • · Configure and verify an LDP-signaled VPLS
  • · Configure and verify a FEC 129 VPLS

VPLS—The Default VLAN Mode

  • · Define the four VLAN modes for VPLS
  • · Define the concept of a bridge domain, and verify the default VPLS VLAN mode

VPLS—VLAN Normalization, VLAN‐Aware Instances, and Dual‐Stacked VLANs

  • · Configure and verify 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

  • · Deploy automated BGP VPLS Site IDs
  • · Configure flood protection, MAC flap protection, and MAC limiting
  • · Explain how to add IRB interfaces to a VPLS, and configure efficient traffic flooding using multicast LSPs · Describe the most important VPLS-specific troubleshooting techniques

VPLS—Multihoming

  • · Configure multihomed sites in a BGP-signaled VPLS
  • · Configure multihomed sites and single sites on the same PE in a BGP-signaled VPLS
  • · Configure best-site multihoming in a BGP-signaled VPLS
  • · Configure multihomed sites in an LDP-signaled VPLS
  • Lab 5: VPLS

3EME JOUR

EVPN—Introduction

  • · Explain the main disadvantages of a VPLS solution
  • · Explain how EVPN overcomes these disadvantages, and enables extra features

EVPN—Using BGP to Advertise MACs and to Flood Traffic

  • · Explain the meaning of an EVPN Instance
  • · Describe how EVPN Type 2 routes advertise MAC addresses and MAC/IP bindings
  • · Describe how EVPN Type 3 routes request to receive flooded traffic within a bridge domain

EVPN—Configuring a Single‐Homed VLAN‐ Based EVI

  • · Configure a service provider network to host EVPN services
  • · Configure a single-homed VLAN-based EVI
  • · Verify a VLAN-based EVI

EVPN—Configuring a Single‐Homed VLAN‐ Aware Bundle EVI

  • · Configure a VLAN-aware bundle EVI
  • · Verify a VLAN-aware bundle EVI

EVPN—Multihoming Configuration and Type 4 Routes

  • · Configure a CE and two PEs to take part in a multihomed EVPN
  • · Describe the contents of the Type 4 Ethernet Segment route
  • · Explain how the Type 4 route prevents layer 2 loops, using the designated forwarder election

EVPN—Multihoming Features Using Type 1 Routes

  • · Describe Type 1 Ethernet Auto-Discovery PerEthernet Segment routes
  • · Explain how Type 1 Per-Ethernet Segment routes prevent layer 2 loops
  • · Describe how Type 1 Per-EVI routes are different from Per-ES routes

EVPN—MAC Mobility and IRB Interfaces

  • · Configure and verify the EVPN MAC Mobility feature
  • · Configure and verify Automatic Gateway MAC-IP Synchronization
  • · Configure and verify Manual Gateway MAC-IP Synchronization
  • · Configure and verify EVPN Virtual Gateway Addresses
  • Lab 6: EVPN

VPLS—LDP and FEC 129 Configuration and Verification

  • · Configure and verify an LDP-signaled VPLS
  • · Configure and verify a FEC 129 VPLS

VPLS—The Default VLAN Mode

  • · Define the four VLAN modes for VPLS
  • · Define the concept of a bridge domain, and verify the default VPLS VLAN mode

VPLS—VLAN Normalization, VLAN‐Aware Instances, and Dual‐Stacked VLANs

  • · Configure and verify 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

  • · Deploy automated BGP VPLS Site IDs
  • · Configure flood protection, MAC flap protection, and MAC limiting
  • · Explain how to add IRB interfaces to a VPLS, and configure efficient traffic flooding using multicast LSPs · Describe the most important VPLS-specific troubleshooting techniques

VPLS—Multihoming

  • · Configure multihomed sites in a BGP-signaled VPLS
  • · Configure multihomed sites and single sites on the same PE in a BGP-signaled VPLS
  • · Configure best-site multihoming in a BGP-signaled VPLS
  • · Configure multihomed sites in an LDP-signaled VPLS

Pré-requis

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· Intermediate-level networking knowledge;

· An understanding of OSPF, IS-IS, BGP, and Junos routing policy;

· Experience configuring MPLS label-switched paths using Junos;

· Completion of the following courses, or equivalent knowledge:

  • o Introduction to the Junos Operating System
  • o Junos Service Provider Switching
  • o Junos Intermediate Routing
  • o Junos MPLS Fundamentals
Pré-requis recommandés :

Bon à savoir

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Self-Study Material

Appendix A: EVPN—Integration with L3VPNs

· Describe the basic functionality of an L3VPN

· Explain how EVPNs and L3VPNs integrate for optimal routing

· Describe how chained composite next hop brings efficiency to EVPN in the Packet Forwarding Engine

Appendix B: Inter‐AS MPLS VPNs

· Describe the functionality of Interprovider Options A, B, and C

· Configure and verify the Interprovider Option C method

· Describe and configure carrier-of-carriers VPNs

Appendix C: Circuit Cross‐Connect

· Use circuit cross-connect to stitch pseudowires together, and to signal pseudowires that have their own pair of dedicated RSVP LSPs

Appendix D: Multisegment Pseudowires

· Explain how a multisegment pseudowire is signaled

· Configure and verify a multisegment pseudowire

Lab 7: Inter‐AS L2VPNs

Appendix E: VPLS—Hub‐and‐Spoke Topologies

· Configure a hub-and-spoke BGP VPLS using route targets

· Configure a hub-and-spoke BGP VPLS using site ranges

· Configure a hub-and-spoke LDP VPLS using hierarchical VPLS

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