Archive for May, 2011|Monthly archive page

Site has moved…

In Uncategorized on May 25, 2011 at 08:34

This site will be moving to and will be updated on that site going forward.

I have left this site accessible as there are links out there and I want to make sure that they still work.

DisplayLink Software

In Cool Tech, Why not? on May 20, 2011 at 19:25

Scott – @scottm32768 on twitter – posted a link about this nifty piece of software called DisplayLink.  It caught my attention very quick as he said it makes your iPad into a display for your Windows 7 PC.  This is something I have been looking for for quite some time.  I have seen some of the people at my work do this with their Apple computers using either the DisplayLink software or another vendor’s I believe.

So why am I doing a post on it, well to help get the word out, that is why!  The DisplayLink application definitely helps to free up the real-estate on your computer as you can toss your Twitter application to it, your e-mail, perhaps a terminal application, or anything else you want to keep an eye on.  This additional real estate on our computers is wonderful!

From their website, they say that the key features are:

  • Creates an interactive, secondary wireless display for your PC with the iPad
  • Windows 7, Vista (32 and 64bit) and XP (32bit) compatible
  • Configuration using the familiar Windows graphics display utility
  • Discovers and connects the iPad screen to your PC over your wireless network quickly and reliably
  • Operates seamlessly with other DisplayLink multi-monitor and dock products to create a rich, productive multi-monitor environment

Being the curious person that I am, I did a quick packet capture when I launched the application.  From what I can tell it is using SSDP multicast ( for a UPnP discovery of the iPad.  Below is an exert of the Wireshark capture so you can see some of the communication. My PC is .11 and the iPad is .111.

So, what do you need in order to get this to work?  4 things in total – Windows 7 PC, iPad, iPad software, and the DisplayLink driver for the computer.  More then likely most of us out there may have these already!

To get the iTunes software, you can click here:

And to get the software, you can visit their page at here.

Once the software is installed it automagically runs on the Windows 7 pc in the taskbar.  The icon could be a little better as it looks like a Network connection, but this is a picture of what it looks like:

From there you can easily change the password, check for updates, optimize video, launch the display panel, and a few other things.  When you first run the application you will need to configure a password, great security feature!

Once you have the iPad application installed, launch the application…

and you will be presented with this screen. From there, select the computer you want to connect to…

..and enter the password when prompted:

After that, it is connected!

You can then configure (via Display Control Panel) where you want this to fit in the scheme of the monitors. As you can see from mine, I have it set under my main display in the middle.  Right in front of my keyboard basically.

When you disconnect, since it is Windows controlling the display, all your stuff is reverted back to the way it was.  Its great!

This is some cool software! I am very impressed so far!

IPv6 – My IPv6 Tutor website

In Uncategorized on May 10, 2011 at 22:11

This is just a quick post on a new venture one of my good friends, Brandon, has embarked on.  Brandon is a well recognized and respected Cisco trainer in the industry and has published a few books for Cisco Press over the years.  His books include CCNA Wireless Official Exam Certification Guide and Cisco Access Control Security as well as a few others.

Recently he has decided to embark on another endeavor, and this one could not have better timing.  He is launching a website for IPv6 tutoring called

If you want to learn more about IPv6 and such, might be a good time to head over there and see what a Cisco Certified Systems Instructor has to say about IPv6!

Cisco Press :: IPv6 for Enterprise Networks

In Book Review on May 6, 2011 at 08:38

We have all been hearing about IPv6 for a few years now. There have been numerous white papers published, blog posts, audio podcasts, as well as the normal twitter chatter on the topic. Lately this topic has come to the forefront more and more since the RIR have handed out the last of the IPv4 /8 networks to the regional registrars. So what does all this mean to you and I? Well, if you have not fully embraced IPv6, the time has definitely come.

Luckily Cisco Press has recently released IPv6 for Enterprise Networks (Networking Technology) for our reading pleasure. Originally I was going to wait until Cisco Live 2011 to get this book, but I just could not wait and my friend, Jamie, was able to help me get it sooner. I am glad that I did not wait! This book is a great read and will help the reader to understand IPv6 as well as help to design and deploy a network.

The book consists of 12, well formatted chapters. They take you from the market drivers, to designing and services, deployment, and all the way to the data center and testing.  What is nice about this book is the progression on the topics.  You do not really need to know IPv6 to read this book, it will actually guide you through the whys and hows then onto the how to as well as testing.  It is nice to have a book that will cover most of the topics that one will experience in an Enterprise design.

The first two chapters in the book talk about the market drivers for IPv6, these are some of the whys that people are wondering.  This is a pretty quick chapter as the killer application is not really out there yet, but is sure to be coming (my best guess will be Asian/Pac e-commerce).  What this chapter does elude to is that this is a good time to be able to restructure your network in a more efficient design.  Consider this, you probably inherited your current network and the design that is currently in place.  With a transition to IPv6, you now have the opportunity to reconsider what was done and determine were you should take it.  The first chapter does good at giving you some points to consider as you read on and helps you to understand some of the underlying design scenarios.

The next two chapters, 3 and 4, start to go over how IPv4 and IPv6 will co-exist in the network and some of the ways to approach this challenge.  There are dual-stacking, 6-to-4 tunnels, MPLS, and the good old duct tape of the network – GRE.  It also continues to talk about services and some of the routing options that one has to consider.  Service such as multicast and QoS are discussed for a decent amount of pages.  These tend to be some of the more important items in an enterprise network.  These chapters also discuss the different routing protocol options – OSPFv3, EIGRPv6, and IS-IS with a mention of BGP.  What does surprise me, there is no discussion on LISP 🙂  Ok, that might have been asking for a bit much, but I do like LISP.

I think that Chapter 5 is a really important chapter in some ways.  This is the chapter where Planning an IPv6 Deployment is discussed.  This is a topic that should not be taken lightly but one that should be a primary focus.  After all the technology and numbers, all that you really have to stand upon is good design.  As i mentioned before, what is nice with IPv6 is that you do not have to base your new design on the existing design, you can actually rethink everything and start fresh.  For instance, if you are currently running EIGRP but want to move to OSPF, deploying IPv6 is the time to start that move.  The two protocols (v4 and v6) are separate from each other.

The next chapters, 6 through 10, are the heart of this book.  Discussed in some good detail is deploying IPv6 in Campus, Virtualized, WAN/Branch, Data Centers as well as Remote Access.  Each of these topics has a good chapter dedicated to it and there are many things that one needs to consider with each of these deployment scenarios.  Again, it all comes down to the choices made during the design and testing phase.

Chapter 11 is a nice chapter on the aspects of Managing IPv6 Networks.  It covers the different ways to monitor and secure various parts of the network.  It is nice to actually see a chapter dedicated to some of the stuff that is quickly overlooked during a design an deployment – how to manage and support all the work that you have done.  Most of this stuff is usually figured out near the end of a project when we hand off things to the NOC – and they say IPvWhat?

The final chapter in the book was a welcomed surprise to me.  This chapter actually talks about how to setup a lab to test IPv6.  It gives some good sample setups that should help the person be able to play with the protocol as well as test different scenarios.  Granted, some of the hardware suggested might be a bit out of reach for most of us (VSS, ISR, etc) – but it is a good starting point to see what you can do.  One can easily see ways to substitute certain hardware for other hardware so one can learn and develop.  If you are going to roll some of this into production, test hardware is invaluable for knowing the problems before they are experienced in a live network.

Overall it is a good read and one that should be handy to those who are working with IPv6 right now.  Not only can you use the information within the book for your own knowledge, but it gives you information on how you can explain it to others.  One of the most difficult things that I come across in an enterprise is explaining difficult topics.  This book helps me to find ways to explain things in ways that others might be able to understand.

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