Price: $2,850.00
3 Days
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Course Overview
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.
Target Audience
This course benefits individuals responsible for configuring and monitoring devices running the Junos OS.
Course Level
- Junos Layer 2 VPNs (JL2V) is an advanced-level course.
Course Objectives
After successfully completing this course, you should be able to:
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
Course Outline
Day 1
1 Course Introduction
2 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
3 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
4 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
5 L2VPN—Configuration
Configure an L2VPN that accepts all Ethernet
traffic
Configure an L2VPN that accepts specific VLAN
tags
6 L2VPN—Troubleshooting
Diagnose and fix L2VPN problems caused by
missing LSPs, mismatched site information, and
incorrect configuration
7 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
8 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
9 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
10 L2Circuit—Troubleshooting
Configure the Pseudowire Status TLV
Explain the meaning of the most frequent L2Circuit
error codes
DAY 2
11 L2Circuit—Advanced Concepts
Describe the purpose and benefits of virtual
circuit connectivity verification
Configure multihoming, local switching, and
interworking
Lab 3: LDP‐Signaled L2Circuits
12 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)
13 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
14 VPLS—LDP and FEC 129 Configuration and
Verification
Configure and verify an LDP-signaled VPLS
Configure and verify a FEC 129 VPLS
15 VPLS—LDP and FEC 129 Configuration and
Verification
Configure and verify an LDP-signaled VPLS
Configure and verify a FEC 129 VPLS
16 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
17 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
18 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
19 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
DAY 3
20 EVPN—Introduction
Explain the main disadvantages of a VPLS
solution
Explain how EVPN overcomes these
disadvantages, and enables extra features
21 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
22 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
23 EVPN—Configuring a Single‐Homed VLAN‐
Aware Bundle EVI
Configure a VLAN-aware bundle EVI
Verify a VLAN-aware bundle EVI
24 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
25 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 Students should have intermediate-level networking knowledge and an understanding of OSPF, IS-IS, BGP, and Junos policy. Students should have experience configuring MPLS label-switched paths using Junos. Students should also attend Introduction to the Junos Operating System (IJOS), Junos Routing Essentials (JRE), Junos Service Provider Switching (JSPX), Junos Intermediate Routing (JIR) and Junos MPLS Fundamentals (JMF) courses prior to attending this class.
