![]() ![]() Another feature that comes in very handy is the ability to snapshot a lab. In short, you can build just about any lab environment you want without taking up a bunch of space in your house with gear that puts out heat, sucks up electricity, and annoys the other residents of your house. ![]() It has a simple frame switch if all you want to do is build a quick frame cloud, or you can go all out and configure an actual router in GNS3 to be your frame switch. You have options such as adding modules into the slots of the various router choices, using different platform types as router choices, and even connecting your virtual lab to your real environment. (See the EIGRP note below.) Here is a sample screenshot from one of my GNS3 lab builds: You can add explanatory notes to your network diagram for good documentation practice. As a suggestion, I use the ellipse drawing tool to mark my OSPF areas. What I also like about the product is the ability to create a very detailed network diagram, including which ports/interfaces are in use, ability to add notes (for instance, the IP address on a particular interface), and the capability to draw shapes such as ellipses and rectangles to enclose particular aspects of your diagram. There is excellent documentation available on their website, and there are numerous places on the web where other users post questions, answers, and sample lab configurations. However, if you don’t mind using emulation (and who can resist the money savings?) then download GNS3 and give it a whirl. If you are absolutely convinced that you want to run only real gear, then keep searching Ebay, Amazon, and whatever other website you feel can get you a nuts-and-bolts lab. And you thought you couldn’t get anything for free! In fact, with this latest release, there is now support for running the Cisco ASA in an emulated environment. GNS3, which stands for Graphical Network Simulator, is not really a simulator, but an emulator, as it runs the actual Cisco IOS (which the user must provide). It is GNS3 0.8.4 RC2 and it is quite worthy of your attention! Also, if you are completely new to GNS3, this is a perfect time to get acquainted with the product, as a new release hit the GNS3 download page in February. This will work, but is not recommended because it is harder to share the VM between projects or other GNS3 users.If you haven’t heard of GNS3 as way to practice your Cisco commands, let me take this opportunity to share a gem of knowledge with you. Use the GNS3 appliance you will find all the instructions here. This the solution supported by Cisco and the GNS3 team. ASAV ĪSAv is a version of ASA made by Cisco for using ASA, and was created with the express goal of it being run in virtualized environments. You will also encounter issues when running multiple ASA instances simultaneously. The ASA kernel can sometimes replace it, depending on the speed of your computer, but results will vary. For example, the hardware clock on the hardware ASA appliance is missing. Qemu can emulate part of the hardware, but some components specific to a physical ASA are missing. is that you are using an image made for a bespoke hardware device from Cisco. The problem with this way of doing things. For example Windows 10 has multiple issues running ASA 8. This method was the only way to get an ASA image in the past, but the results are random and getting worse with modern computers and operating systems. You may find a lot of tutorials on the Internet explaining how to extract ASA 8 images from physical hardware devices and use them with GNS3.
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