Overlay Virtual Networking

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This vendor-agnostic webinar briefly revisits the networking needs of server virtualization and IaaS cloud computing and describes the benefits and drawbacks of overlay virtual networks as compared to traditional VLAN-based solutions (including VM-aware networking technologies like 802.1Qbg). The second half of the webinar focuses on architectural and scalability aspects of individual solutions from major virtualization vendors (Cisco, VMware, Microsoft) and open-source alternatives (OpenStack).

Overlay Virtual Networking

11:34 Introduction

This section contains important information you should read before starting the webinar, and describes the typical IaaS networking requirements:

  • Multiple tenants sharing the same infrastructure;
  • Multiple virtual networks (or routing domains) per tenant;
  • Elastic and scalable solution architecture.
Read This First 1.3K 2022-06-23
Requirements 11:34 2013-10-18

44:53 Free items Overlay Virtual Networking Overview

Traditionally we used VLANs to create multiple tenant networks... and hit numerous scalability limitations, resulting in most virtualization vendors embracing overlay virtual networks.

This section describes typical overlay virtual networking functionality, various encapsulation technologies, and interfaces between overlay networks and physical world.

The Need for Overlay Virtual Networks 10:31 2013-10-18
Overlay Virtual Networks 101 10:50 2013-10-18
Gateways and Virtual Appliances 23:32 2013-10-18

1:17:48 Free items Packet Flows

Mastered the fundamentals? Let’s do a deep dive into how layer-2 forwarding, gateways, and distributed layer-3 forwarding work in overlay virtual networks.

Layer-2 Overlay Virtual Subnets 11:38 2014-06-05
Layer-2 MAC Learning and Flooding 15:42 2014-06-05
Layer-2 Gateways 9:24 2014-06-11
Layer-3 Gateways 4:36 2014-06-05
Distributed Layer-3 Forwarding 12:32 2014-06-05
Layer-3 Overlay Virtual Networks 18:01 2014-06-11
Conclusions and Questions 5:55 2014-06-11

7:00 Recommendations and Conclusions

Recommendations and Conclusions 7:00 2013-10-25

17:11 From the Design Clinic

Overlay Virtual Networking Implementation Options 17:11 2021-10-01

Slide Decks

Overlay Virtual Networking 12M 2013-08-27
Following Packets across Overlay Virtual Networks 3.7M 2014-04-15

Free items Public Presentations

Overlay Virtual Networking Explained - PLNOG11 6.7M 2013-10-03

20:46 Obsolete Implementations

This section describes several obsolete overlay virtual networking implementations; you might find it useful when researching the history of networking.

Hyper-V Network Virtualization 11:44 2013-10-25
Midokura Midonet 5:06 2013-10-25
IBM SDN VE 3:56 2013-10-25
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