Home / Blogs

Network Dis-Aggregation and SDN: Different, But Related

Don't miss a thing – sign up for CircleID Weekly Wrap newsletter delivered to your inbox once a week.
Chris Grundemann

Two of the hottest trends in networking today are network dis-aggregation and SDN. This is great for many reasons. It's also confusing. The marketing hype makes it hard to understand either topic. SDN has become so vague that if you ask 10 experts what it means, you are likely to get 12 different answers. Network dis-aggregation seems straightforward enough until it gets confused with SDN. We need to take a step back. In a recent Packet Pushers blog post; I start with a simple explanation of each of these trends and then map how they interact.

Software Defined Networking (SDN)

I try not so use the term "SDN." As Ethan recently pointed out, its been so badly abused that it has, essentially, lost all meaning. The flip side is that the term isn't going anywhere. Companies are selling SDN and executives are asking for SDN. Just like "cloud," we seem to be stuck with "SDN." The best we can do is work to agree on a common, if general, definition — and be more specific whenever possible.

For now, we're left to define the term every time we use it. At its core, I believe that SDN has two components; network automation, and network analytics. Automation encompasses concepts such as logically centralized management, network programmability, and network abstraction. Analytics provides the information you need to make informed decisions when planing, building, and operating your network. Analytics also provide the feedback needed for advanced automation (i.e. autonomous networks). Whether you use OpenFlow or overlays, whether you write your own Ansible playbooks or leverage complex orchestration systems; the fundamentals of SDN are always the same. Putting information into the network, and getting information out of the network.

Using this definition, I don't see SDN as an option as much as an inevitable progression of network management. Networks are becoming more and more vital to our society while the ratio of devices to engineer continues to climb. We must find ways to simplify network operations and increase network efficiency. Today, those solutions fall under the umbrella of SDN.

Network Dis-aggregation

Here's another imperfect term. Taken literally, "network dis-aggregation" means to separate the network into its component parts. Wouldn't that just mean looking at individual routers, switches, and firewalls? More specifically, we probably should say 'network device dis-aggregation' or 'hardware and software dis-aggregation in network devices.' Too bad those phrases are so unwieldy.

What we're talking about here is the ability to source switching hardware and network operating systems separately. This is like buying a server from almost any manufacturer and then loading an OS of your choice. This is where I'm supposed to say, "thank the heavens that networking is finally catching up to systems." And it IS great that this is an option now. The proliferation of "whitebox" and "britebox" switching platforms, combined with the explosion of available network operating systems (NOS'), are together putting pricing and innovation pressure on the legacy "aggregated" networking vendors. Don't forget however why so many people love their Apple products; sometimes it still makes sense to engineer hardware and software together.

Note: This trend is going to get even more exciting as we start to see commodity hardware built on programmable merchant silicon, like Barefoot's Tofino, Cavium's XPliant, and Innovium's Teralynx.

Combining Network Dis-aggregation and SDN

Deploying dis-aggregated network devices and deploying SDN are not the same thing. There is an obvious relationship between the two though.

To dig into how network dis-aggregation and SDN interact, and how they may guide your journey to the network you want, check out the full post on Packet Pushers!

By Chris Grundemann, Internet Technologist, Author, and Speaker; Principal Architect at Myriad Supply. More blog posts from Chris Grundemann can also be read here.

Related topics: Access Providers, Cloud Computing, Data Center

 
   

Comments

To post comments, please login or create an account.

Related Blogs

Related News

Explore Topics

Dig Deeper

Afilias Mobile & Web Services

Mobile Internet

Sponsored by Afilias Mobile & Web Services
Afilias

DNS Security

Sponsored by Afilias
Verisign

Cybersecurity

Sponsored by Verisign

Promoted Posts

Now Is the Time for .eco

.eco launches globally at 16:00 UTC on April 25, 2017, when domains will be available on a first-come, first-serve basis. .eco is for businesses, non-profits and people committed to positive change for the planet. See list of registrars offering .eco more»

Boston Ivy Gets Competitive With Its TLDs, Offers Registrars New Wholesale Pricing

With a mission to make its top-level domains available to the broadest market possible, Boston Ivy has permanently reduced its registration, renewal and transfer prices for .Broker, .Forex, .Markets and .Trading. more»

Industry Updates – Sponsored Posts

2016 U.S. Election: An Internet Forecast

i2Coalition to Host First Ever Smarter Internet Forum

What Holds Firms Back from Choosing Cloud-Based External DNS?

Verisign & Forrester Webinar: Defending Against Cyber Threats in Complex Hybrid-Cloud Environments

Dyn Evolves Internet Performance Space with Launch of Internet Intelligence

Hybrid Cloud Proves Clouds Are Worthy of Email Infrastructure

Verisign OpenHybrid for Corero and Amazon Web Services Now Available

DotConnectAfrica Attends Transform Africa 2013 Summit in Rwanda

Dyn Research: CDN Adoption Across Our Customer Base

Neustar Launches Global Partner Program

Neustar Chief Technology Officer Appointed to FCC's Technological Advisory Council

Neustar Expands Professional Services Offerings for Communications Service Providers

A Look at Traffic Management for External "Cloud" Load Balancing

Dyn Research: Where Do Companies Host Their Websites?

Reducing the Risks of BYOD with Nominum's Security Solution

New Nixu NameSurfer 7.3 Series Powers the Software-Defined Data Centre

Nixu Integrates with Nominum N2 Platform in Hybrid Cloud Environments

Nominum and IBM Partner Around Big Data

New Nixu Solution Slashes Cloud Application Delivery Times from Weeks to Milliseconds

Virgin Media Selects Nominum to Support London Underground WiFi Roll-out