![]() ![]() not the FQDN), the (UNIX) username of the user running IOU, the version of IOU in use, etc.Īt the time of this writing, port 80/TCP on is not reachable from the Internet, however, so the connection (and submission of identifying data) will not be successful. The data includes your (short) hostname (e.g. Can I be tracked if I’m using IOU?Īt startup, Cisco IOU attempts to make an HTTP POST of some XML data to a host at. In addition, any requests for Cisco IOU images in the comments section of this blog will be deleted, regardless if distribution is legal in your country. I cannot speak regarding the laws of other countries. Distribution of copyrighted software is a federal crime in the United States. I have managed to acquire copies of several versions but I have not, do not, and will not distribute them.Ĭisco IOU, just like IOS, is copyrighted software that belongs to cisco Systems, Inc. If you have to ask, you’re probably not one of the few persons at Cisco authorized to distribute it, so no. Don’t do it or we’ll have to come and kill you. Distribution of IOU images to customers or external persons, or discussion of IOU with customers or external persons, is prohibited. From an old, internal-only Cisco web page:Ĭisco IOS on Unix is a tool intended for internal use only. If you are not an authorized Cisco employee (or trusted partner), usage of Cisco IOU is potentially a legal gray area. Legal Warnings Is it legal to use Cisco IOU? ![]() If you have never used a UNIX CLI before, you probably want GNS3 instead. Knowledge of vi (or other UNIX text editors) and basic shell scripting would be useful. To successfully install and run Cisco IOU, you will need to be familiar with the UNIX command line. A graphical installer allows pretty much anyone capable of clicking “Next” to get the software up and running. ![]() What skills do I need to run IOU?ĭynamips, dynagen, and GNS3 are all cross-platform and can be run on Windows, Linux, and OS X. Any examples that I provide in this FAQ will be based upon Cisco IOU running on Debian. ![]() While the images should run on any 32- or 64-bit (x86/amd64) Linux host, I highly recommend using Debian GNU/Linux. The versions of IOU that have been available via BitTorrent are all Linux only, I believe. Nowadays, however, there are also builds for Linux and OS X (though I’m not sure the OS X builds are still maintained). It is my understanding that, initially, IOU was Solaris (SPARC) only. This is useful for validating network designs, proof-of-concept testing, and certification self-study. IOU allows you to build out a network topology on a single PC without the need for physical routers. With regard to functionality, it is very similar to GNS3 but it does not require nearly the resources that several virtual routers running under dynamips does. IOU supports all platform independent protocols and features. IOU is built as a native Solaris image and run just like any other program. All sales are final.įrom the Cisco Engineering Education Web Site (a long time ago):Ĭisco IOS on UNIX (IOU) is a fully working version of IOS that runs as a user mode UNIX (Solaris) process. Your mileage may vary, void where prohibited, for a limited time only. I make no assurances as to the accuracy of any of the information herein. Some of it has been discovered on my own or contributed by other users of IOU (thank you!). Most of the information in this FAQ has been gathered from documentation that is several years old. If you wish to share or link to the FAQ, please use this permanent URL. It is not intended to be comprehensive or complete and will be updated from time to time. This list of frequently asked questions has been compiled in response to an overwhelming number of requests for information about Cisco IOS-on-UNIX (IOU). 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. ![]()
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