Overlay Virtual Networking

Overall rating: 4.83 Instructor: 4.94 Materials: 4.89 more …

Networking and virtualization vendors have launched numerous overlay virtual networking solutions in the last 2 years as a response to the rigidity and scalability failures of traditional VLAN-based data center virtual networks.

Not surprisingly, each vendor touts its particular (and usually proprietary) solution as the best one to solve your networking infrastructure challenges, forcing you to make tough choices when designing or deploying the network infrastructure for a private or public cloud.

This vendor-agnostic session 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 session focuses on architectural and scalability aspects of individual solutions from major virtualization vendors (Cisco, VMware, Microsoft), and open-source alternatives (OpenStack).


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The second half of the webinar focuses on packet flows across layer-2 virtual subnets, layer-3 virtual subnets, L2 and L3 gateways, and virtual and physical appliances. The technologies covered in this section include:

  • Cisco Nexus 1000V in multicast and unicast mode;
  • vCNS 5.5 (multicast VXLAN);
  • VMware NSX (unicast VXLAN and Open vSwitch);
  • Distributed routing in VMware NSX;
  • Hyper-V Network Virtualization;
  • Juniper Contrail;
  • Nuage Networks Virtualized Services Platform (VSP).

The Author

Ivan PepelnjakIvan Pepelnjak, CCIE#1354 Emeritus, is an independent network architect, book author, blogger and regular speaker at industry events like Interop, RIPE and regional NOG meetings. He has been designing and implementing large-scale service provider and enterprise networks since 1990, and is currently using his expertise to help multinational enterprises and large cloud- and service providers design next-generation data center and cloud infrastructure using Software-Defined Networking (SDN) and Network Function Virtualization (NFV) approaches and technologies.

Ivan is the author of several books covering data center technologies, highly praised webinars, and dozens of data center and cloud-related technical articles published on his blog.

More about Ivan Pepelnjak

Target Audience

Network architects, designers and implementation engineers working in environments that plan to deploy cloud services.