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Software Defined Wide-Area Networks

by Nick Feamster Designers of wide-area networks are turning to Software Defined Networking (SDN) to overcome the limitations of existing network protocols for setting up wide-area network configurations. Software Defined WANs (SD-WANs) refer to any wide-area network that is managed by software control; there are generally two types of SD-WANs:

VXLAN Comes of Age with BGP-EVPN

by Mike Cohen & Harry Petty Back in 2011, when software-defined networking was in its infancy, Arista, Broadcom, Cisco, Citrix, and Red Hat joined together to rethink multi-tenancy and segmentation in the cloud datacenter.  The output of this collaboration was Virtual eXtensible Local Area Networks (VXLAN). VXLAN introduced an overlay scheme that expands the layer-2 […]

Realizing the Vision of Network Services Virtualization – The Role of Solution Architecture

by Bob Natale Network Services Virtualization (NSV) is an emergent capability, a transformation in network service delivery and consumption capabilities rising from the optimal integration of enabling technologies that collectively underpin the revolution in network virtualization. The set of NSV-enabling technologies – summarized in the listing in Figure 1 (red font) – centers on Network […]