blindhog.net

Here at Blindhog.net, we have issued tutorials for connecting Windows or Linux to a physical network using gns3, but apparently, there is a little difference for MacOSX.  I recently received an email from one of our readers, Ivan Pletenev. Ivan describes how to connect GNS3 to internet through wifi-interface in MacOSX. You will find his writeup below. Thanks Ivan!

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I apologize for the delay in posting the next tutorial in the virtual voice lab but I ran into a problem communicating from the HQ router to the host Ubuntu server. I thought I was able to communicate from the HQ router to the host during the Headquarters build tutorial….but I was wrong.

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I just finished the video tutorial for the headquarters part of the virtual voice lab. This tutorial will basically walk you through adding all the devices for the headquarters location.
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While poking around the new GNS3.net forum, I found two very interesting howto posts. Jeremy Grossman (gns3 author) describes the processes needed to bridge a wireless NIC to GNS3 using both Linux and Windows.

Here are the links:

Bridge with a Wireless NIC on Linux

Bridge with a Wireless NIC on Windows
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In the Virtual Voice lab series, I am using an Ubuntu Linux environment.  To eliminate permissions issues, it is best that you run GNS3 as root.

Here are a couple issues I have experienced when running GNS3 as a normal user.

Not able to start dynamips.
Error msg: Can’t Connect to the hypervisor on port 7200

Not able to connect to a cloud object.
Error Msg: 206-unable to create Linux raw ethernet NIO
Error Msg: 206-unable to create Linux generic ethernet NIO
Error Msg: 206-unable to create UDP NIO

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In this tutorial, you will learn how to build a Cisco switching lab … even though GNS3 cannot emulate a Cisco switch. I will show you how to use an NM-16ESW network module in a 3640 router to emulate a switching environment.

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If you have used GNS3 for any amount of time at all, you have encountered this situation. It’s late and you have been working on your lastest lab for hours. You decide to save your work. Logically, you go to File > Save. Unfortunately, the topology is saved but the router configs are gone.

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One of the major hurdles many people face with GNS3/Dynagen/Dynamips is that the emulators do not come with the Cisco Images to actually build a lab. It seems like once a week, I get an email with a request for an IOS Image, Pix Image, Pix Serial Numbers or Pix Activation codes. Just so I make myself clear, I will not give this information to you. Period. However…

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In this tutorial, you will learn how to build a small frame-relay lab. I will walk you through adding the routers, the frame switch, configuring the PVCs on the switch, and configuring the routers for basic point-to-point connectivity.

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In Part 2 of the GRE/IPSec tutorial series, you will learn how to encrypt the GRE tunnels you built in Part 1. Although I only show you how to create a hub and spoke topology, it is also possible to create a fully meshed topology or even a partial mesh. I highly recommend creating GRE tunnels from the branch to every datacenter in your organization.

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