Configuring OSPF – The Basics

Routing_UpdatesWe have to start somewhere so let’s look at the basics of configuring OSPF. Remember OSPF is an IGP (Interior Gateway Protocol) and allows packet authentication as well as IP multicast when sending and receiving updates. In this post we are configuring OSPF in a single area. Continue reading “Configuring OSPF – The Basics”

GNS3 1.0 Public is Out

gns3_logoGet your IOS, IOU, XRV, 1000v, HP, Juniper, Arista, and other images ready because that’s the beauty of GNS3, it’s here and ready to download. I’m excited for this release although the last post I did was In May of 2014, which was about getting GNS3 Alpha 3 working on Windows, you can see the full post here: GNS3 Alpha – Install and Setup. I have followed the GNS3 releases throughout the six months of them releasing Alpha and beta releases, as well as looking at changlogs of each release. So over the past six months we have seen some changes with the GNS3 team. The new logo, the new website, and of course the new 1.0 version of GNS3. They have also done a good job of setting up a new portal called the GNS3 Jungle which is for the community to ask all things networking all of which is available now. Check out all of it at

Currently the GNS3 website is a little slow because I think we are all excited for the new software and can’t wait to get our hands on it but I was able to register so I’ll be posting more about the new version of GNS3 so keep that in mind, and check me out the GNS3 Jungle lewiryan.  Thanks again Stephen and Jeremy and the entire GNS3 team for building a great piece of software with the help of an awesome community. Another interesting read that I found was a post from NetworkCanuck about an Interview with Steven from GNS3, read it here: GNS3 – An Interview. So I’ll end this post with what are you loading into GNS3?

640-911 (Chapter 8 & 9)

Back where we left off, if you have followed I have gone over the  CCNA Data Center Study Guide from Todd Lammle and in this post we will cover two chapters 8 and 9. Comment below if you have any questions on these two chapters let’s get started. Continue reading “640-911 (Chapter 8 & 9)”

Look at GNS3 – New Version

Look at GNS3 – New Version: A new version of GNS3 released on July 5th 2013 is available for download. You can download GNS3 v0.8.4 at This release includes improvements and new features. Some of the important one are:

  • Lots of GUI improvements.
  • New hub device.
  • New Idlemax and Idlesleep settings (advanced manipulation of IDLE PC).
  • IOS image and settings test button.
  • New Tool menu to start external scripts/tools.
  • Drag & drop of multiple devices when pressing SHIFT.
  • Temporary projects are created by default.
  • VirtualBox interface numbering starts at 0 (e.g. e0 = VirtualBox interface 1 = eth0 on Linux).
  • Support for 36 network cards in VirtualBox (using ICH9 chipset)
  • New option to save traffic captures in project directories.
  • Experimental auto IDLE PC calculation feature (requires Dynamips greater than 0.2.8-RC5, which is included in Windows all-in-one and OSX DMG).
  • Added entries to have Dynamips/Qemu/VirtualBox hypervisors bind/listen to all available IP/host addresses (optional).
  • AW+ router support by Allied Telesis from New Zealand (educational version of their OS to be released).
  • Removed the “Save IOS configs option” in project settings. IOS configs are always saved.
  • Qemu FLASH files are automatically saved in a directory named ‘qemu-flash-drives’ (in the project directory).
  • Dynamips version 0.2.8

You can also read the changelog for a full list of changes!

I have used GNS3 off and on with my certification studies, it has always been a great program for that “what if question.” Currently I am using if for some OSPF routing redundancy checks and some proof of concept designs. What are some good topologies for GNS3 have you seen? Post some links!

I have just downloaded the new version and I will get back with you 🙂
Have questions about GNS3? Post them on the GNS3 Forum.

Configuring AAA – Locally

SecureA while back I talked about AAA but never put out a post on how configure it until now. In this post I am going to be going over the configuration steps of how to configure AAA locally on a Cisco router, (The same commands would also work on Cisco switch). To review what exactly AAA does check my earlier post Understanding AAA. Continue reading “Configuring AAA – Locally”