No longer will networks act as a bottleneck to a nimble cloud. With overlay networks, engineers have a physical network that lies on top of their physical infrastructure. That virtual network overlay allows network resources to be dynamically provisioned similarly to virtual compute and storage. This form of virtualization allows the network to be part of the overall cloud orchestration framework.
1Overlay networks 101-
Exploring the basics of overlay networks
Overlay networks run as independent virtual networks on top of a physical network infrastructure. These virtual network overlays allow cloud providers to provision and orchestrate networks alongside other virtual resources. They also offer a new path to converged networks and programmability. However, network overlays shouldn't be confused with other forms of SDN.
NaaS is enabled by three technologies, including SDN, and is making virtual convergence a realistic idea. Continue Reading
Multi-tenant data center networks are becoming a reality with the help of virtual overlay networks and tunneling protocols. Continue Reading
SDN overlays make way for network virtualization
Overlay networks are one form of network virtualization -- a method of combining resources in a network by splitting up available bandwidth into channels and assigning each to a particular service or device in real time. The goal of network virtualization is to improve productivity and efficiency by allowing tasks typically performed by a network administrator to be done automatically. Learn more about overlay networks' role in deploying network virtualization.
Traditional and virtual architectures can complement each other in an existing network when using network virtualization. Ethan Banks explains. Continue Reading
To create a dynamic network with SDN, it's critical to understand network orchestration and virtualization to eventually gain more flexibility. Continue Reading
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3Challenges and upsides-
Understanding the challenges, reaping the benefits of network overlays
The onslaught of SDN, network virtualization and overlay networks hasn't come without challenges. Read about some of the concerns network admins have with network virtualization, along with myths that exist about overlay networks and how these new approaches to the network provide benefits, like NaaS and SLAs.
Virtualization admins weren't all on board during VMware's quest to capture the market with NSX. Continue Reading
4Making overlays a reality-
Overlay networks in the real world
Market predictions in the past few years focused on overlay networks. Read more about overlay network use cases and how companies like Nuage Networks and Juniper Networks offer overlay network platforms.
Engineers have to bridge physical and virtual networks to make networks flexible enough to support cloud orchestration. Continue Reading
Juniper Networks not only made Contrail overlay software open sourced, but it is now commercially available. Continue Reading
5Overlay networks terminology-
Overlay network definitions
Learn the terms and definitions behind concepts related to overlay networks.