Introduction xvii Chapter 1 Introducing the Juniper Ecosystem 1 Junos Architecture 1 Building Layer 2 and Layer 3 Networks with Junos 3 Introducing the Junos CLI 4 Building a Network with Junos 11 Miscellaneous Junos Features 25 Rescue Configuration 25 Junos Copy Utility 26 Junos Groups 26 Junos Insert Utility 28 Summary 30 Chapter 2 Overview of Data Center Architecture 31 History and Evolution of Data Centers 31 Data Center Designs and Overlay Architectures 37 3-Stage Clos Fabric 37 5-Stage Fabric 39 Collapsed Spine Design 40 Summary 41 Chapter 3 BGP for the Data Center 43 BGP Path Hunting and ASN Scheme for Data Centers 44 Implementing BGP for the Underlay 49 Auto-Discovered BGP Neighbors 59 Summary 67 Chapter 4 VXLAN as a Network Virtualization Overlay 69 Introducing VXLAN 70 EVPN for Data Center VXLAN Fabrics 75 Summary 79 Chapter 5 Bridged Overlay in an EVPN VXLAN Fabric 81 Configuring and Validating a Bridged Overlay EVPN VXLAN Fabric 82 Configuring the Underlay 83 Configuring the Overlay 91 Packet Flow in a Bridged Overlay Fabric 97 Learning MAC Addresses and EVPN Type-2 Routes 101 High-Level Software Architecture for MAC Address Learning 101 Learning Local MAC Addresses 102 Learning Remote MAC Addresses 112 Proxy ARP and ARP Suppression 116 Replication of BUM Traffic and EVPN Type-3 Routes 120 EVPN Multihoming with ESI LAG and EVPN Type-1/Type-4 Routes 127 Configuring ESI LAG and EVPN Multihoming 129 MAC Address Synchronization Across ESI LAG VTEPs 132 EVPN Type-4 Routes and the Need for a Designated Forwarder 139 Aliasing, Fast Convergence, and Split Horizon with EVPN Type-1 Routes 147 Core Isolation in an EVPN VXLAN Fabric 157 Route Targets in an EVPN VXLAN Fabric 159 MAC Mobility 169 Loop Detection 173 Connectivity Fault Management 178 Loop Prevention Mechanism Using IETF Draft draft-snr-bess-evpn-loop-protect 181 Bidirectional Forwarding Detection in an EVPN VXLAN Fabric 182 Summary 188 Chapter 6 MAC-VRFs 189 Introducing EVPN Service Types 189 VLAN-Based MAC-VRFs 191 Order of Operations with MAC-VRFs 200 Shared Tunnels with MAC-VRFs 201 VLAN-Aware MAC-VRFs 204 Overlapping VLANs, VLAN Translation, and VLAN Normalization 208 VLAN Translation 210 VLAN Normalization 214 Summary 223 Chapter 7 Centrally Routed Bridging 225 Introducing Integrated Routing and Bridging and CRB Design 225 Configuring a Centrally Routed Bridging EVPN VXLAN Fabric 228 Validating and Understanding EVPN Route Exchange in a CRB Fabric 238 Importance of "Sticky" MACs for Virtual Gateway and IRB Addresses 250 Historical (and Present Day) Relevance of proxy-macip-advertisement 255 Packet Walk for Hosts in Different Subnets 263 Control Plane Flow 264 Data Plane Flow 271 Summary 277 Chapter 8 Edge-Routed Bridging 279 Overview of Different Routing Models with Edge-Routed Bridging 279 Asymmetric IRB 283 Configuring and Validating Asymmetric IRB 283 Control Plane and Data Plane with Asymmetric IRB 291 Symmetric IRB 300 Configuring and Validating Symmetric IRB 300 Control Plane in a Symmetric IRB Design 304 Data Plane in a Symmetric IRB Design 313 Silent Hosts in a Symmetric IRB Design 319 Summary 323 Chapter 9 Routed Overlay and Host-Routed Bridging 325 Overview of a Routed Overlay Design 325 Understanding EVPN Type-5 Routes and Their Use in Data Centers 326 Configuring and Validating Routed Overlay 329 Host-Routed Bridging 340 Summary 352 Chapter 10 DHCP in EVPN VXLAN Fabrics 353 A DHCP Refresher 353 DHCP in a Bridged Overlay Fabric 355 DHCP in an Edge-Routed Bridging Fabric 361 DHCP Server in a Dedicated Services VRF 367 Summary 375 Chapter 11 Data Center Interconnect 377 Introduction to DCI 377 Over-the-Top DCI 380 Integrated Interconnect with IP Transit 394 Stitching Two Bridged Overlay Data Centers via IP Transit 396 Stitching EVPN Type-2 Symmetric IRB Routes 415 Stitching EVPN Type-5 Routes 431 Integrated Interconnect with MPLS Transit 436 Control Plane Flow 442 Data Plane Flow 448 Summary 453 Chapter 12 Building Data Centers with Juniper Apstra, Part I--Apstra Foundation 455 Introduction to Juniper Apstra 455 Building Blocks of Apstra 457 Onboarding Devices in Apstra 463 Zero Touch Provisioning 464 Manual Onboarding 475 Creating Rack Types and Templates 481 Creating Rack Types 482 Creating Templates 487 Deploying a Bridged Overlay 3-Stage Clos Fabric 489 Lifecycle of a Device in Juniper Apstra 515 Summary 516 Chapter 13 Building Data Centers with Juniper Apstra, Part II--Advanced Apstra Deployments 517 Edge-Routed Bridging with Symmetric IRB 517 Data Center Interconnect with Juniper Apstra 530 Over-the-Top DCI 539 Adding an External Generic System 539 Creating Connectivity Templates 542 Configuring OTT DCI 552 Integrated Interconnect 558 Interconnect Domain and MSB for Auto-derivation of Interconnect ESI 560 Creating Remote BGP EVPN Peers 561 Extending IP VRFs and Virtual Networks 562 Configuring DC2 for Integrated Interconnect 569 Validating Integrated Interconnect 571 Summary 574 Chapter 14 Building Virtual Fabrics with vJunos, Containerlab, and Juniper Apstra 575 Installing Containerlab and Building the vJunos-switch Image 575 Instantiating a Virtual Topology with vJunos-switch and Containerlab 579 Orchestrating a Virtual Fabric with Apstra 583 Summary 590 Chapter 15 Large-Scale Fabrics, Inter-VRF Routing, and Security Policies in Apstra 591 Deploying a 5-Stage Clos Fabric 591 Inter-VRF Routing in Apstra Deployments 601 Deploying Security Policies in Apstra 618 Summary 629 Acronym Legend 631 Appendix A Quick Reference Guide 635 9780138225391 TOC 3/28/2024.