The Virtualization Practice

Tag Archive for SDN

NetworkVirtualization

Software-defined networking (SDN) is clearly one of the hot items of the tech field at the moment.  VMware’s purchase of Nicira precipitated a sea change, leading to today’s plethora of SDN vendors and array of competing technologies. It reminds me the early noughties—the introduction of virtualization, competing hypervisor technology stacks and Unix/Linux Zones*—followed by the…

SDN-Icon

On April second, Cisco introduced something that seems to make a lot of sense in its new declarative-based, ACI-led world of software-defined networking: a policy mechanism. The blog post about it was pretty straightforward: it included the obligatory nods toward the Internet Engineering Task Force (IETF) and open-source communities, defined the differences between the traditional…

DataCenterVirtualization

Many network virtualization products appear to be aimed at the top 10,000 customers worldwide, accounting for their price as well as their published product direction. While this is a limited and myopic view, many claim it is for the best, their reason being that network virtualization is only really needed by the very large networks. The more I think about this approach, the more I believe it is incorrect. Let us be frank here. Most networking today, within many different organizational sizes, is a hodgepodge of technologies designed to solve the same problem(s) over and over: how to get data quickly from point A to point B with minimum disruption to service.

Virtual Networking Is Not Network Virtualization

While SPB is a very interesting protocol, my questions were about how deep into the virtual environment the protocol extends. While SPB and other networking protocols are considered by some to be network virtualization, I could not see this within the realm of the virtual network and hence, confusion reigned supreme. Depending on who is talking to each other, the same words can mean many different things. What I found amazing, still, is that most people thinks networking ends at the physical NIC within the virtualization host, and that what is inside, does not matter as much as what is outside.

DataCenterVirtualization

Over the last few weeks I have been struggling with automating deployment and testing of virtual desktops for my own edification. This struggle has pointed out automation weaknesses which need to be addressed for automation and the software defined data center to succeed and not only be deployed from software but also self-healing and all the great things we associate with SDDC, SDN, etc. But current automation has some serious flaws and weaknesses. In essence, in order to automate something you must have a well known exact image from which to work.