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iou2net and IOUlive86 now available on Github

December 5, 2011
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From the Cisco IOU FAQ page: Cisco IOS on UNIX (IOU) is a fully working version of IOS that runs as a user mode UNIX (Solaris) process. IOU is built as a native Solaris image and run just like any other program. IOU supports all platform independent protocols and features. Many of you are already […]

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IOU License Generator on Github

November 1, 2011
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NOTE: For clarification, I did not write the IOU License Generator discussed in this article. It was written by someone else; I simply wrote this article about it. If you’re in need of a license key for Cisco IOU, you’re in luck. A new license generator, iougen, has popped up on Github in the last […]

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September 22, 2011

In the months since Cisco IOU leaked out, many people have began using it for study purposes instead of or in addition to dynamips. One advantage that dynamips has over IOU is the ability to communicate with a physical network which comes in handy sometimes, like when you want to do pointless things like dumping […]

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Announcing Free CCNA Labs (and Giveaway)

September 21, 2011

Those of you studying for the CCIE lab exam have some great resources at your disposal. In particular, there are some excellent lab workbooks with “hands on” exercises to work through to help prepare you for that $1500 lunch with Cisco. One thing that really annoyed me as I was working towards the CCNP certification […]

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Shared Links – 2011-04-13

April 13, 2011

Below are links to the latest pages that I found relevant, interesting, funny, or just plain WTF. Your mileage may vary. Void where prohibited. All sales are final. Enjoy! Cisco Learning Network Announces Lab Access based on IOS on Linux: I’ve been hearing a rumor for a few months that Cisco is going to release […]

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Example Cisco IOU Topology

January 21, 2011

Here’s an example topology for Cisco IOU to help you get started: In this example, SF is an IOU instance running on host “solaris”. IOUlive is also running on this host, bridging SF’s Ethernet0/0 interface to my physical network (and to the world). SJ1, SJ2, and SJ3 are IOU instances running on host “helium”. The […]

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January 18, 2011

I’ve received a lot of blog comments and e-mails since I first posted about Cisco IOU, so I have put together this comprehensive list of frequently asked questions to help alleviate some of that. Preface This list of frequently asked questions has been compiled in response to an overwhelming number of requests for information about […]

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Cisco adding Switching to IOU on Lab Exam

January 14, 2011

From the Cisco Learning Network: In alignment with CCIE level requirements, Cisco is adding L2 switching features to the CCIE R&S Troubleshooting exam through L2 IOS software on Unix (L2IOU) virtual environment. The new feature will be available starting January 17, 2011. The CCIE R&S exam consists of 2 sections – the troubleshooting (TS) section […]

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Creating a NETMAP file for IOU

January 9, 2011

Those of you who use Dynamips and Dynagen are familiar with the .net files that are necessary for the virtual routers to interoperate (example). Cisco IOU also uses a file, named “NETMAP” to describe the virtual topology. Here’s a simple NETMAP file: 101:0 101:18 102:2 102:0 There are two routers represented here, identified by “application […]

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Defeating Cisco IOU’s License Protection

January 9, 2011

Cisco’s IOS-On-UNIX (IOU) images are protected by a licensing mechanism requiring that users generate a valid license from an internal Cisco website. Users must first obtain a “key” that is based off of a machine’s hostname and IP address and provide this key when obtaining a license. Because of the use of the hostname and […]

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