IP Routing Lab for Optical Engineers

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Solution Overview

There is a movement in the industry to combine the optical network and the routed network, with Cisco leading the charge. The architecture is known as RON, Routed Optical Networks. With the RON architecture, the services that Optical Engineers are accustomed to delivering within the optical network are now provided via the routed network.

Typically, an optical network's turn-up, provisioning, and monitoring are done within a GUI (graphical user interface), but routed networks rely on CLI (command line interface). There are GUI options for routed networks, but there is still a significant dependency on CLI configuration. This lab focuses on command line configurations which will enable you to see how these networks are built and work. The RON architecture does utilize DWDM for site-to-site bandwidth requirements, but this lab focuses on routing technology; therefore, DWDM is not within the scope of this lab.

Using a Cisco XRv virtual router network, this lab will take you through the initial router to router (site-to-site) connectivity, basic routing between sites and applying SR-MPLS in combination with Layer 3 and Layer 2 VPNs. As you progress through the lab, we will show you how each building block of the network functions and how they deliver transport services between locations.

Goals & Objectives

The purpose of this lab is to provide a hands-on environment that can be used to gain familiarity with Segment Routing MPLS (SR-MPLS) running on Cisco routers. The exercises in this lab are meant to guide the user through the basic SR-MPLS over ISIS and BGP L3VPN and L2VPN setup on Cisco XRv9000 virtual routers. The lab exercises are based on the basic SR-MPLS configuration and commands available in Cisco IOS XR.

SR-MPLS simplifies service deployment using the MPLS data plane and advertising Prefix labels using standard extensions to the ISIS and OSPF routing protocols, thus eliminating the need for Classical LDP. This lab will focus on SR-MPLS with ISIS, but the same principles apply to OSPF.

This lab guide will walk the user through the basic configuration of ISIS and Segment Routing MPLS, including L3VPN and L2VPN service provisioning. The lab demonstrates how the SR-MPLS concepts are configured and deployed on Cisco IOS XR using IOS XRv9000 instances in vCloud. This environment utilizes 6 IOS XRv9000 v7.1.1 routers.

The configuration exercises include:

  • Point-to-Point router connectivity and validation
  • Enable and validate IP routing
  • Demonstrate IP routing functionality
  • Enable Segment Routing SR-MPLS
  • Validate SR-MPLS label forwarding
  • Configure L3VPN with BGP
  • Configure L2VPN VPWS
  • Test IP Fast Reroute - TI-LFA

Hardware & Software

Six Cisco IOS XRv9000 routers running 7.1.1

Three Ubuntu Linux Boxes