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Virtual network design guide

VMware Network Virtualization Design Guide T e c h n i c a l W HI T E P A P E R January CVMware Network Virtualization Design Guide Table of Contents Intended Audience Overview Components of the VMware Network Virtualization Solution vSphere Distributed Switch Logical Network VXLAN vCloud Networking and Security Edge vCloud Networking and Security Manager vCloud Director VXLAN Technology Overview Standardization E ?ort Encapsulation VXLAN Packet Flow Intra-VXLAN Packet Flow Inter- VXLAN Packet Flow Network Virtualization Design Considerations Physical Network Network Topologies with L Con ?guration in the Access Layer Network Topologies with L Con ?guration in the Access Layer Logical Network Scenario ?? Green ?eld Deployment Logical Network with a Single Physical L Domain Scenario ?? Logical Network Multiple Physical L Domains Scenario ?? Logical Network Multiple Physical L Domains with vMotion Scenario ?? Logical Network Stretched Clusters Across Two Datacenters Managing IP Addresses in Logical Networks Scaling Network Virtualization Consumption Models In vCloud Director In vCloud Networking and Security Manager Using API Troubleshooting and Monitoring Network Health Check VXLAN Connectivity Check ?? Unicast and Broadcast Tests Monitoring Logical Flows ?? IPFIX Port Mirroring Conclusion T ECHNICAL W HI T E P A P E R CVMware Network Virtualization Design Guide Intended Audience This document is targeted toward virtualization and network architects interested in deploying VMware network virtualization solutions Overview The IT industry has gained signi ?cant e ?ciency and exibility as a direct result of virtualization Organizations are moving toward a virtual datacenter VDC model and exibility speed scale and automation are central to their success Although compute and memory resources are pooled and automated networks and network services such as security have not kept pace Traditional network and security operations not only reduce e ?ciency but also limit the ability of businesses to rapidly deploy scale and protect applications VMware vCloud Networking and Security o ?ers a network virtualization solution to overcome these challenges Application Application Application Workload Workload Workload x Environment Virtual Machine Virtual Machine Virtual Machine Server Hypervisor Requirement x Decoupled L L L - Network Services Virtual Network Virtual Network Virtual Network Network Virtualization Platform Requirement IP Transport Physical Compute and Memory Physical Network Figure Server and Network Virtualization Analogy Figure draws an analogy between compute and network virtualization Just as VMware vSphere abstracts compute capacity from the server hardware to create virtual pools of resources network virtualization abstracts the network into a generalized pool of network capacity The uni ?ed pool of network capacity can then be optimally segmented into logical networks directly attached to speci ?c applications Customers can create logical networks that span physical boundaries optimizing compute resource utilization across clusters and pods Unlike legacy architectures logical networks can be scaled without recon ?guring the underlying physical hardware Customers can also integrate network services ??such as ?rewalls VPNs and load balancers ??and deliver them exactly where they are needed ??Single pane of glass ? management for all these services further reduces the cost and complexity of datacenter operations