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Junos MPLS and VPNS (JMV)

Course 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

Course Outline

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

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