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SDN Network Models

#SDN models: switches and overlays As with most new exciting (read: hyped) technology there's always some initial fragmentation that occurs in the market. Everyone wants to have their fingers in the newest pie and from that comes wha... Read more
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Applying ‘Centralized Control, Decentralized Execution’ to Network Architecture

#SDN brings to the fore some critical differences between concepts of control and execution While most discussions with respect to SDN are focused on a variety of architectural questions (me included) and technical capabilities, there’s another... Read more
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SDN, OpenFlow, and Infrastructure 2.0

#infra2 #openflow #sdn #devops As cloud recedes, it reveals what it hid when the hype took it big: a focus on the network. Like cloud two or three years ago, SDN and OpenFlow dominated the talk at Interop. During a show that’s (in theory at least)... Read more
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F5 Friday: Creating a DNS Blackhole. On Purpose

#infosec #DNS #v11 DNS is like your mom, remember? Sometimes she knows better.   Generally speaking, blackhole routing is a problem, not a solution. A route to nowhere is not exactly a good thing, after all. But in some cases it’s an... Read more
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Virtualization and Cloud Computing: A Technological El Niño

The shift of focus from north-south to east-west networking isn’t just inside the data center, it’s a global phenomenon It’s called “east-west” networking, which when compared to its predecessor, “north-south” networking, evinces images of... Read more
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Infrastructure Architecture: Removing Blinders from Security Infrastructure

Infrastructure architecture is often the answer to many of IT’s most challenging issues. It is a fact of IT that different businesses have different technical requirements in terms of security, processing, performance, and even storage. In many... Read more
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Cloud Infrastructure Integration Model: Virtualization

Examining architectures on which hybrid clouds are based… IT professionals, in general, appear to consider themselves well along the path toward IT as a Service with a significant plurality of them engaged in implementing many of the building... Read more
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Cloud Infrastructure Integration Model: Bridging

Examining architectures on which hybrid clouds are based… IT professionals, in general, appear to consider themselves well along the path toward IT as a Service with a significant plurality of them engaged in implementing many of the building... Read more
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Cloud Computing: Architectural Limbo

When abstraction becomes a distraction, cloud computing becomes a realm of architectural limbo… Cloud. It sounds so grand in NIST’s description; full of promises with respect to the ability to provision and manage resources without having to... Read more
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Service Virtualization Helps Localize Impact of Elastic Scalability

Service virtualization is the opposite of – and complementary implementation to – server virtualization. One of the biggest challenges with any implementation of elastic scalability as it relates to virtualization and cloud computing is... Read more
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Are You Ready for the New Network?

Three simple action items can help ensure your next infrastructure refresh cycle leaves your data center prepared and smelling minty fresh*. Most rational folks agree: public cloud computing will be an integral piece of data center application... Read more
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The IT Optical Illusion

Everyone has likely seen the optical illusion of the vase in which, depending on your focus, you either see a vase or two faces. This particular optical illusion is probably the best allegorical image for IT and in particular cloud computing I ... Read more
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A Hardware Platform and a Virtual Appliance Walk into a Bar at Interop…

Invariably when new technology is introduced it causes an upheaval. When that technology has the power to change the way in which we architect networks and application infrastructure, it can be disruptive but beneficial. When that technology... Read more
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The Order of (Network) Operations

Thought those math rules you learned in 6thgrade were useless? Think again…some are more applicable to the architecture of your data center than you might think. Remember back when you were in the 6th grade, learning about the order of operations... Read more
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The Devil is in the Details

Or more apropos, it’s in the complex and intimate relationship between applications and their infrastructure. What’s the difference between a highly virtualized corporate data center and a cloud computing environment? There are probably many,... Read more
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Does a Dynamic Infrastructure Need ARP for Applications?

There’s more than one way to address the rapid rate of change in infrastructure supporting a dynamic environment. We spend a lot of time talking about how software and systems and standards are the ultimate solution to addressing the rapid rate... Read more
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You are the new number 3ffe:1900:4545:3:200:f8ff:fe21:67cf

I am not a number, I am a free man! – "The Prisoner", sampled by Iron Maiden (edited because geeks are picky and well, they're right even though I always think of Maiden and Eddie first before getting to the actual origins) We,... Read more
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The network ain’t big enough for the both of us

There is a tendency to describe every device on a network as simply “the network” regardless of whether that device is dedicated to security, or application delivery (layer 4-7), or actual network (layer 2-3) functionality. It’s an artifact of... Read more
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Are admins developers too?

If they aren’t now then Infrastructure 2.0 may force them in that direction - and vice versa. My brother (yes, it does run in the family) has a degree in computer science which, by most definitions, makes him a developer. That’s the focus of... Read more
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Five Key Questions Developers Need to Ask before Starting the Troubleshooting Process

Brother, can you give a developer a hand? As the topology of networks delivering applications becomes increasingly complex it becomes more and more difficult to troubleshoot problems, especially for developers tasked with figuring out why their... Read more
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Infrastructure 2.0: The Diseconomy of Scale Virus

The diseconomy of scale so adversely affecting the IP address management space isn't limited to network infrastructure; it's crawling up the stack steadily and infecting all layers of the data center like some kind of unstoppable... Read more
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A client is still a client even when it's on the space station

While I was at SD Best Practices in Boston last month I got to talk to a lot of engineers, developers, and architects about their environments and about what F5 does for application delivery. One of the developers glibly told me he wasn&#3... Read more
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Cloud Computing: What's stopping service-oriented clouds?

Whenever there is a shift in architectural thinking about technology, such as is happening right now with cloud computing and virtualization, we start thinking forward, past the now, and into the future about how that technology might be... Read more
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Infrastructure 2.0: Aligning the network with the business (and the rest of IT)

When SOA was the hot topic of the day (not that long ago) everyone was pumped up about the ability finally align IT with the business. Reusability, agility, and risk mitigation were benefits that would enable the business itself to be more agile... Read more
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3 steps to a fast, secure, and reliable application infrastructure

You have just been promoted to CTO of Widgets, Inc. (Congratulations, by the way!) In your new role, on which of the following will you focus the most attention (and budget): (a) the network (b) the applicat... Read more
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