Junos MPLS Fundamentals (JMF)

• Individuals responsible for designing, implementing, and troubleshooting MPLS networks that make use of RSVP and LDP as the signaling method for the creation of LSPs; 

• Individuals who work with, or who aspire to work with, service provider networks; 

• Individuals studying for the JNCIS-SP certification exam; and 

• Individuals who have already passed the JNCISSP certification exam, and want to revise these concepts before attempting the JNCIE-SP certification exam 

• Explain the reasons MPLS was originally created, and the applications offered by label-switched paths. 

• Describe the structure of an MPLS label, the mechanics of the data plane, and the protocols that can advertise labels. 

• Configure static LSPs, verify the routing tables they populate, and explain the label actions these LSPs perform. 

• Explain the purpose and advantages of RSVP, then configure a service provider network to host RSVP LSPs. 

• Configure and verify a basic RSVP label-switched path. 

• Explain the purpose of the MPLS traffic engineering database, and create LSPs that use this database to calculate a path. 

• Explain the purpose of RSVP bandwidth reservations, and how to configure an LSP to reserve bandwidth. 

• Explain the use-cases for RSVP LSP priority levels and configure different priority levels of a variety of LSPs. 

• Explain how the Constrained Shortest-Path First algorithm can calculate trafficengineered paths. • Explain the messages involved in tearing down, rerouting, and maintaining LSPs and RSVP sessions. • Describe how primary and secondary paths can be used in times of link and node failure. 

• Describe the advantages of RSVP local repair paths, and how to configure the one-to-one method of local repair, otherwise known as fast reroute. 

• Explain the mechanics, configuration, and verification of facility backup, otherwise known as link protection and node-link protection. 

• Explain how RSVP LSPs can automatically find and signal better, more optimal paths. 

• Explain how LSPs can gracefully move traffic to new paths with no downtime to the user. 

• Explain the mechanics by which LDP creates a full mesh of label-switched paths. 

• Configure and verify a basic LDP deployment in a service provider network. 

• Describe some important LDP enhancements and best practices that increase the integrity of real-world LDP deployments. 

• Explain how to configure LDP to advertise labels for more than just a router's loopback. 

• Explain how segment routing differs from RSVP and LDP, and configure segment routing as a replacement for LDP.

Day 1 

Course Introduction

MPLS—Introduction 

• Describe the BGP remote next-hop mechanic, and hop-by-hop forwarding 

• Explain the original historical motivations for MPLS 

• List the alternative modern use cases for MPLS 

MPLS—The Mechanics 

• Explain how labels are built, and how they flow between routers 

• Describe the end-to-end data plane of a packet across a label-switched path 

• Summarize the four primary protocols that can build label-switched paths 

MPLS—Static LSPs and the Forwarding Plane 

• Configure a service provider’s edge and core devices for MPLS 

• Configure the headend router of an LSP and explain the impact this has on the router's inet.3 table • Configure transit routers and verify their mpls.0 tables 

Lab 1: Static LSPs and the Forwarding Plane 

RSVP—Introduction 

• Explain the purpose, features, and advantages of RSVP 

• Configure a service provider network to be ready to host RSVP label-switched paths 

RSVP—Configuring A Basic LSP 

• Configure and verify an RSVP label-switched path that follows the metrically best path 

• Explain the purpose of MPLS self-ping 

• Explain how an RSVP LSP is signaled and created 

RSVP—The Traffic Engineering Database 

• Describe the purpose of the IS-IS/OSPF traffic engineering extensions 

• Configure and verify an LSP that uses the traffic engineering database to calculate its path 

• Explain the impact that loose and strict hops can have on an LSP 

Lab 2: RSVP LSPs

Day 2

RSVP—LSP Bandwidth Reservation 

• Describe the use cases for RSVP bandwidth reservations, and the Path message objects that are used 

• Configure LSP bandwidth reservations, and verify how these reservations are advertised 

RSVP—LSP Priorities 

• Describe problems that can be caused by RSVP LSP bandwidth reservations, and the solution offered by priority levels 

• Describe the default RSVP LSP priority levels, and configure alternative settings 

• Configure LSP soft preemption to avoid downtime 

Lab 3: RSVP—LSP Bandwidth and Priorities 

RSVP—Constrained Shortest Path First, and Admin Groups 

• Describe the CSPF algorithm, along with its tie breakers 

• Configure and verify admin groups on LSPs 

RSVP—LSP Failures, Errors, and Session Maintenance 

• Describe the events that can tear down an LSP, and the RSVP messages that make it happen 

• Describe how RSVP has changed over the years from a soft-state protocol to a reliable stateful protocol 

RSVP—Primary and Secondary Paths 

• Explain the use cases and configuration for primary and secondary paths 

• Identify the benefits and trade-offs of standby secondary paths 

• Show the advantage of pre-installing backup paths to the forwarding table 

Lab 4: RSVP—Primary and Secondary Paths

RSVP—Local Repair, Part 1—One-to-One Backup or Fast Reroute 

• Demonstrate the downtime that can be caused by a link or node failure in an MPLS network, and how a local repair path can significantly reduce this downtime 

• Explain the mechanics of the one-to-one backup method 

• Explain the many different meanings of the term “fast reroute” 

• Configure and verify the one-to-one backup method of local repair 

RSVP—Local Repair, Part 2—One-to-One Backup or Fast Reroute 

• Demonstrate the downtime that can be caused by a link or node failure in an MPLS network, and how a local repair path can significantly reduce this downtime 

• Explain the mechanics of the one-to-one backup method 

• Explain the many different meanings of the term “fast reroute” 

• Configure and verify the one-to-one backup method of local repair 

Lab 5: RSVP—One-to-One Backup and Facility Backup

Day 3

RSVP—LSP Optimization 

• Describe the LSP optimization algorithm and how to configure this feature 

RSVP—Make-Before-Break and Adaptive 

• Describe the make-before-break mechanic, and list the features that use this mechanic by default • Explain how shared explicit signaling can prevent double-counting of bandwidth, and configure this feature for all other LSPs 

LDP—The Label Distribution Protocol 

• Describe the key features, advantages, and trade-offs of LDP 

• Explain the particular methods by which LDP generates and advertises MPLS labels

LDP—Configuration 

• Configure a basic LDP deployment, and describe the protocol messages that this configuration generates 

• Verify the interface messages, sessions, and labels that this configuration generates 

Lab 4: RSVP— Primary and Secondary Paths 

LDP—Enhancements and Best Practices 

• Explain the LDP-IGP Synchronization feature that reduces dropped packets during topology changes 

• Describe how the BGP next-hop resolution process can be altered in LDP 

• Configure session protection to improve the integrity of LDP during network failure 

LDP—Egress, Import, and Export Policies 

• Configure and verify LDP egress policies to advertise any FEC of your choosing 

• Configure and verify LDP import and export policies to limit the distribution of FECs 

Lab 6: LDP—Label Distribution Protocol 

Appendix A: Segment Routing

• Strong general TCP/IP knowledge; 

• knowledge of Junos OS to the JNCIA-Junos certification level; and 

• Knowledge of routing and switching to the JNCIS-SP certification level. 

• The following courses or equivalent knowledge: 

o Getting Started with Networking online course 

o Introduction to the Junos Operating System course 

o Junos Intermediate Routing course 

o Junos Enterprise Switching course, Junos Service Provider Switching course, or both

JNCIS-SP exam topics are based on the content of the recommended instructor-led training courses, as well as the additional resources.

• Exam code: JN0-363

• Written exam

• Administered by Pearson VUE

• Exam length: 90 minutes

• Exam type: 65 multiple-choice questions

• Pass/fail status is available immediately

• Junos Software Release: 21.2

The JNCIS-SP certification is valid for three years.

Exams can be purchased and scheduled at https://home.pearsonvue.com/junipernetworks/

Delegates will receive an official set of e-kit courseware approximately 1 week prior to the start of the course.