USING 802.1q, QnQ AND A BREAKOUT SWITCH

A brief overview

GNS3 is an excellent platform for simulating a good sized router environment for testing and more importantly for preparing for your CCIE lab. There are, however, some known limitations. The Dynamips software does not currently support more up to date switches like the 3560s used in version 4 of the CCIE Routing and Switching lab. In GNS3 on Ubuntu, you were provided with guidance on setting up GNS3 on Ubuntu GNU/Linux. You were shown how to run it as root and also introduced to the .net file that ultimately drives your lab topology. Dynamips and GNS3 (for the purpose of this article we will refer to it simply as GNS3) both support extending your virtual topology to your physical Ubuntu host. This gives us some very creative options for merging our virtual topology with physical hardware. We will use this article to demonstrate one of two different ways to extend your virtual topology to your physical hardware via some simple .net file adjustments and network configurations. You should already have a reasonable understanding of the fundamentals of Dynamips, GNS3, and the .net files before going too deep into this. You also are expected to have a reasonable knowledge of GNU/Linux and of course Cisco switching. Remember. Google is your friend.

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This was brought up by two students in the security online study list but I thought it was worth mention.

You can add regular expressions to NBAR class-maps for HTTP URL matching protocol maps.

Let’s do an example

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Note: This article is not directly related to the CCIE exam as EEM TCL Scripting is not on the blueprint.

With the continuing growth of the IT industry it seems that often the push is to do more with less. As a Network Administrator there are common tasks that many do day to day that really are a waste of time. In my opinion anything you can automate will help in removing mundane tasks you do from day to day and decrease your workload. So learning automated tools that can decrease your workload is one of the best steps you can take for yourself.

In this tutorial I will show an example script and walk through the script to hopefully enable you to better understand EEM TCL Scripting.

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A student on OSL recently requested information on how to test SSM. He was testing with ping as we would with typical Multicast configurations and it wasn’t working.

Unfortunately Source Specific Multicast doesn’t work with this test as SSM relies on the requester to specify the Unicast Source to receive the multicast traffic from. I responded with this same information on OSL but am posting it here to have a more readable format and better archiving for access in the future.

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Hello Everyone,

I noticed in my last bootcamp when trying to demonstrate the consent auth-proxy feature there have been some minor modifications in the function of it. I want to go thru and explain each part to show how to do it and to give you the full configuration. Let’s first start by discussing each of the components of the configuration.

Auth-Proxy is used to prevent access to network resources until a user has authenticated. Following are the components of the configuration

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