Junos MPLS and VPNs

This course is designed for:

• Individuals responsible for configuring and monitoring devices running the Junos OS

Upon completing this course, the learner will be able to meet these overall objectives:

• Explain common terms relating to MPLS.
• Explain routers and the way they forward MPLS packets.
• Explain packet flow and handling through a label-switched path (LSP).
• Describe the configuration and verification of MPLS forwarding.
• Understand the information in the Label Information Base.
• Explain the two label distribution protocols used by the Junos OS.
• Configure and troubleshoot RSVP-signaled and LDP-signaled LSPs.
• Explain the constraints of both RSVP and LDP.
• Explain the path selection process of RSVP without the use of the Constrained Shortest Path First (CSPF) algorithm.
• Explain the Interior Gateway Protocol (IGP) extensions used to build the Traffic Engineering Database (TED).
• Describe the CSPF algorithm and its path selection process.
• Describe administrative groups and how they can be used to influence path selection.
• Describe the default traffic protection behavior of RSVP-Signaled LSPs.
• Explain the use of primary and secondary LSPs.
• Explain LSP priority and preemption.
• Describe the operation and configuration of fast reroute.
• Describe the operation and configuration of link and node protection.
• Describe the LSP optimization options.
• Explain the purpose of several miscellaneous MPLS features.
• Explain the definition of the term “Virtual Private Network”.
• Describe the differences between provider-provisioned and customer-provisioned VPNs.
• Describe the differences between Layer 2 VPNs and Layer 3 VPNs.
• Explain the features of provider-provisioned VPNs supported by the Junos OS.
• Explain the roles of Provider (P) routers, Provider Edge (PE) routers, and Customer Edge (CE) routers.
• Describe the VPN-IPv4 address formats.
• Describe the route distinguisher use and formats.
• Explain the RFC 4364 control flow.
• Create a routing instance, assign interfaces, create routes, and import and export routes within the routing instance using route distinguishers and route targets.
• Explain the purpose of BGP extended communities and how to configure and use these communities.
• Describe the steps necessary for proper operation of a PE to CE dynamic routing protocol.
• Configure a simple Layer 3 VPN using a dynamic CE-PE routing protocol.
• Describe the routing-instance switch.
• Explain the issues with the support of traffic originating on multiaccess VPN routing and forwarding table (VRF table) interfaces.
• Use operational commands to view Layer 3 VPN control exchanges.
• Use operational commands to display Layer 3 VPN VRF tables.
• Monitor and troubleshoot PE-CE routing protocols.
• Describe the four ways to improve Layer 3 VPN scaling.
• Describe the three methods for providing Layer 3 VPN customers with Internet access.
• Describe how the auto-export command and routing table groups can be used to support communications between sites attached to a common PE router.
• Describe the flow of control and data traffic in a hub-and-spoke topology.
• Describe the various Layer 3 VPN class-of-service (CoS) mechanisms supported by the Junos OS.
• Explain the Junos OS support for generic routing encapsulation (GRE) and IP Security (IPsec) tunnels in Layer 3 VPNs.
• Describe the flow of control traffic and data traffic in a next-generation MVPN.
• Describe the configuration steps for establishing a next-generation MVPN.
• Monitor and verify the operation of next-generation MVPNs.
• Describe the purpose and features of a BGP Layer 2 VPN.
• Describe the roles of a CE device, PE router, and P router in a BGP Layer 2 VPN.
• Explain the flow of control traffic and data traffic for a BGP Layer 2 VPN.
• Configure a BGP Layer 2 VPN and describe the benefits and requirements of over-provisioning.
• Monitor and troubleshoot a BGP Layer 2 VPN.
• Explain the BGP Layer 2 VPN scaling mechanisms and route reflection.
• Describe the Junos OS BGP Layer 2 VPN CoS support.
• Describe the flow of control and data traffic for an LDP Layer 2 circuit.
• Configure an LDP Layer 2 circuit.
• Monitor and troubleshoot an LDP Layer 2 circuit.
• Describe and configure circuit cross-connect (CCC) MPLS interface tunneling.
• Describe the difference between Layer 2 MPLS VPNs and VPLS.
• Explain the purpose of the PE device, the CE device, and the P device.
• Explain the provisioning of CE and PE routers.
• Describe the signaling process of VPLS.
• Describe the learning and forwarding process of VPLS.
• Describe the potential loops in a VPLS environment.
• Configure BGP and LDP VPLS.
• Troubleshoot VPLS.
• Describe the Junos OS support for carrier of carriers.
• Describe the Junos OS support for interprovider VPNs.

MPLS Fundamentals

• MPLS Foundation
• Terminology
• MPLS Configuration
• MPLS Packet Forwarding

Label Distribution Protocols

• Label Distribution Protocols
• RSVP
• LDP

Constrained Shortest Path First

• RSVP Behavior Without CSPF
• CSPF Algorithm
• CSPF Tie Breaking
• Administrative Groups

Traffic Protection and Optimization

• Default Traffic Protection Behavior
• Primary and Secondary LSPs
• Fast Reroute
• Bypass LSPs
• LSP Optimization

Miscellaneous MPLS Features

• Routing Table Integration
• Forwarding Adjacencies
• Policy Control over LSP Selection
• LSP Metrics
• Automatic Bandwidth
• TTL Handling
• Explicit Null Configuration
• MPLS Pings

VPN Review

• Overview of VPNs
• CPE-Based VPNs
• Provider-Provisioned

Layer 3 VPNs

• Layer 3 VPN Terminology
• VPN-IPv4 Address Structure
• Operational Characteristics

Basic Layer 3VPN Configuration

• Preliminary Steps
• PE Router Configuration

Troubleshooting Layer 3 VPNs

• A Layered Approach
• The routing-instance Switch
• PE-Based and CE-Based Traceroutes
• Viewing VRF Tables and PE-PE Signaling Flow
• Monitoring PE-CE Routing Protocols

Layer 3 VPN Scaling and Internet Access

• Scaling Layer 3 VPNs
• Public Internet Access Options

Layer 3 VPNs—Advanced Topics

• Exchanging Routes Between VRF Tables
• Hub-and-Spoke Topologies
• Layer 3 VPN CoS Options
• Layer 3 VPN and GRE Tunneling Integration
• Layer 3 VPN and IPsec Integration

Multicast VPNs

• Multicast VPN Overview
• Next-Generation MVPN Operation
• Configuration
• Monitoring

BGP Layer 2 VPNs

• Overview of Layer 2 Provider-Provisioned VPNs
• BGP Layer 2 VPN Operational Model: Control Plane
• BGP Layer 2 VPN Operational Model: Data Plane
• Preliminary BGP Layer 2 VPN Configuration
• BGP Layer 2 Configuration
• Monitoring and Troubleshooting BGP Layer 2 VPNs

Layer 2 VPN Scaling and CoS

• Review of VPN Scaling Mechanisms
• Layer 2 VPNs and CoS

LDP Layer 2 Circuits

• LDP Layer 2 Circuit Operation
• LDP Layer 2 Circuit Configuration
• LDP Layer 2 Circuit Monitoring and Troubleshooting
• Circuit Cross-Connect

Virtual Private LAN Services

• Layer 2 MPLS VPNs Versus VPLS
• BGP VPLS Control Plane
• BGP VPLS Data Plane
• Learning and Forwarding Process
• Loops

VPLS Configuration

• VPLS Configuration
• VPLS Troubleshooting

Interprovider VPNs

• Hierarchical VPN Models
• Junos Support of Carrier-of-Carriers Model
• Junos Support of Carrier-of-Carrier VPN Applications

The knowledge and skills that a learner must have before attending this course are as follows:

• Intermediate-level networking knowledge
• An understanding of the Open Systems Interconnection (OSI) model and the TCP/IP protocol suite
• Familiarity with the Protocol Independent Multicast-Sparse Mode (PIM-SM) protocol

To gain the prerequisite skills and knowledge, Juniper strongly recommends the knowledge of the following courses:

• Introduction to the Junos Operating System (IJOS)
• Junos Routing Essentials (JRE)
• Junos Service Provider Switching (JSPX)
• Junos Intermediate Routing (JIR)

• IJOS - Introduction to the Junos Operating System
• JIR - Junos Intermediate Routing
• JSPX - Junos Service Provider Switching

Recommended as preparation for:

• JN0-360 - Juniper Networks Certified Internet Specialist - Service Provider (JNCIS-SP)

JMV is one of the courses required for the Juniper Networks Certified Internet Specialist - Service Provider (JNCIS-SP) Certification

• AJSPR - Advanced Junos Service Provider Routing
• JCOS - Junos Class of Service
• JMR - Junos Multicast Routing