Security for Cloud Infrastructures

by Marc Woolward Having spent the best part of three decades architecting and operating enterprise infrastructures, including 16 years at Goldman Sachs, it’s clear to me that the security model within the data center represents the last major barrier to our transition to ‘software-defined’ cloud computing architectures. Existing security ‘art’ fails to serve the challenges of […]

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 […]