Dynamips / Dynagen Tutorial. Documentation Revision Introduction Installing IOS Images Resource Utilization Configuring your Telnet Client Network. I downloaded and ran the installer, which on my x64 box put everything into C:\ Program Files (x86)\Dynamips. (On a bit machine this will be. Reading Time: 2 minutes. If you’re like myself who doesn’t have the space, time, money or power in your own home, having a large scale.
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This post is a set of my notes on Dynagen setup. Dynagen is a text-only frontend to the kewl Dynamips software emulation for Cisco router for use when studying for exams or whenever you need to emulate a router. You can also use this article to set your idle-pc value and reduce CPU usage from the Dynamips server.
You can get Dynagen and the embedded Dynamips from Dynagen SourceForge site and there is a nice Windows installer you can download directly. The link takes you to a page specifying a. I downloaded and ran the installer, which on my x64 box put everything into C: On a bit machine this will be simply C: The following shows the installer start: For completeness here is the finished install: Dynagen comes with a nice tutorial as part of the installed package.
We have found that the key to a successful Dynagen lab experience is careful setup of the lab environments. We will indicate in our. NET files which image we want to use; more on that later.
CCNA – Dynagen / Dynamips Setup – softwareab
Keep your dynwmips nice and tidy. The following shows our FirstLab with a single entry…our. The above picture shows that we have named our. NET file to match our folder name FirstLab. This helps us to know exactly which lab a particular. NET file belongs to and will be a great relief when we have created tons of these labs.
CCNA – Dynagen / Dynamips Setup
The Dynagen system works by reading the text-based. NET filewhich we by now have in our dedicated project directory. Check that first if you have dynnamips questions:. NET file extension is associated with dg-local.
Take a look at the above screen. First, you an see that the virtual router R1 was started when we double-clicked the. Take a look at the next screenshot: You dynamipx start and stop the router s defined within the. NET fileand we also show how you open a console to the running router.
Your first virtual console session. You open a router console for our first lab by using the console R1 dynamkps. Now…this may not work as Telnet client may not be installed: If you still run into the error after enabling Telnetyou can get to the console.
Just run the same command as Dynagen is doing. That started the console, which should resemble this if you open the console while the virtual router is booting: Is that kewl or what? We have a dynamipa Cisco router running. Remember that right now we are burning all of our CPU for this virtual router. Now imagine that we have four or five of these routers running not at all unusual with some of dhnamips more complex labs for the CCNA. So to fix it, we follow the instructions in the Dynagen Tutorial, which boil down to this: Start a lab with a single router.
We just did that. Wait for the router to initialize and quiesce. Basically, wait for a minute or so which we have just done. Calculate the idle-pc values. Note in the following shot we selected option 2, although either option 2 or 3 would have been fine.
Verify that CPU usage is reduced. In the following screenshot we see that CPU usage for dynamips. Save the idle-pc value.
After verifying CPU usage is reduced, you can either use the idlepc save R1 db to save the value permanently, or you may update the. NET file with the explicit value. We took that approach and show the result below: That should be it for setting idle-pc. At this point, you have a working system that emulates a single Cisco router using the loaded IOS image. For example, the following shot shows us entering enhanced mode en command and then displaying the current configuration show run command.
Looking at the generated files. Remember how we emphasized putting each Dynagen lab in its own folder? Now you can see why we put each lab in its own folder…image if you had a single folder for multiple labs and your files were overwriting each other all over the place! Check back in with us as we document our journey through the CCNA certification. Team-oriented systems mentor with deep knowledge of numerous software methodologies, technologies, languages, and operating systems.
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