COURSE OBJECTIVE:
• 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.
TARGET AUDIENCE:
• 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
COURSE PREREQUISITES:
• 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
COURSE CONTENT:
Day 1 Course IntroductionMPLS—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 LSPsDay 2RSVP—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 PathsRSVP—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 BackupDay 3RSVP—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 labelsLDP—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
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