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IWAN Wed: What’s more important? Uptime or Cost?

Screen Shot 2014-07-01 at 5.25.06 PM“Location, Location, Location” is what you need to keep in mind for real estate in the physical world.  But in today’s
enterprise environment where everything is virtual and many critical apps are in  the data center or cloud, the most important thing is connectivity.

So welcome to the era of connectivity, connectivity, connectivity!

As connectivity is so important, what can we do to ensure the uptime of the branch WAN connectivity without increasing costs?

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IWAN Wed: Is FIFA supported on the ISR?

Food for thought

The other day, I went to the café to grab my lunch and notice something that got me thinking of an IT problem we’re going to see more and more.

I’m not a soccer sport fan but of course I am aware of the 2014 FIFA World Cup™ event that is happening.

Anyways, I saw a guy watching a live stream of the game between Iran and Nigeria on his mobile device and it got me thinking “I wonder how much bandwidth this thing is taking?”

All major sports event like the Superbowl, World Cup, NBA Finals, PGA tour, Olympics, etc. are streaming LIVE games and many people around the globe are watching the World Cup during business hours as its always 9 to 5 somewhere. Read More »

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IWAN Wed: Securing Your Transport Independence with DMVPN

In my last blog I talked about the value of Pfr to the IWAN solution. This week I wanted to talk about DMVPN and why it is going to be a critical component of your IWAN deployment.

Your IWAN topology will most likely consist of one or more internet connections which means that your data will be traveling over untrusted connections and shared environments so security is going to be top of mind. So how do you secure your data over the internet and other untrusted or shared environments? Well DMVPN (Dynamic Multi-point Virtual Private Network) is based on VPN the same technology that many of you use today to securely connect back to your office when you are traveling or working from home. A VPN will create a tunnel between two end-points and then encrypt all data traveling over the tunnel. VPN’s can connect users to a remote site, client-to-site VPN, or connect two remote sites, site-to-site VPN. Unlike VPN, DMVPN can securely connect multiple points together dynamically.

DMVPNSo how does DMVPN work and what is the benefit to IWAN?  DMVPN works on top of your WAN infrastructure which means that DMVPN tunnels will be established between branch sites as traffic flow demands. In a common hub and spoke topology example, when data needs to be sent from the spoke to the hub site, the spoke will establish a VPN tunnel to the hub by registering first with the hub.  In order for each tunnel to function a new dynamic IP address is created at the branch since the hub site will initiate the connection. In order for data to be routed between sites over the DMVPN tunnels, routing information will need to be exchanged. As more tunnels are created there will be more dynamically created IP addresses and traditional routing protocols like BGP or EIGRP are used to efficiently share routing information so all sites can talk to each other. Lastly QoS is applied to each tunnel to ensure that the hub site does not oversubscribe the spoke sites.

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Why Should I Care About Hybrid Networking?

When customers ask me why they should care about hybrid networks,

I ask them the following questions.

  • Did the number of mobile devices in your enterprise increase?
  • Did the number of applications on your datacenter increase?
  • Do your employees and guests expect to stay continuously connected while in the office?

If the answer is yes to any of the above questions, you may need more bandwidth! If you want more bandwidth without a major increase in your OPEX, then you should consider hybrid networks.

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IWAN Wed: What is Intelligent WAN?

Imagine that you have several branch offices that are using WAN demanding applications like Salesforce.com, Office 365, Virtual Desktops, Video Teleconferencing and more.  You are using those expensive MPLS/VPN WAN connections as you don’t want to risk it and probably because when you started to work there it was already there and … why mess around with something that is working, right?  Normally I would agree with that but when IT budgets are shrinking and the network needs to step up and support those business critical apps, there is no other way but to innovate.

At any given time your network carries information from LAN to WAN and vice versa, some is important and some is less important. In many cases as a network admin you don’t have the visibility to distinguish between them, so what do you do when those critical apps are starting to act up? Usually the answer will be to buy more WAN bandwidth and that will give the apps and the user experience behind them some breathing space. But all you’re doing is buying time.  Buying time never solves the problem because you will need to treat the symptoms again in a few weeks or months.

However, you can solve the problem and not just treat the symptoms using Cisco Intelligent WAN or IWAN for short.

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