Poll: Volume 4 – GNS3 or IOU?

So far GNS3 seems to have been working well for the first three volumes, but I feel like I should ask whether, for volume 4, a move to IOU (IOU-Web to be exact) would be preferred.

There are a couple of reasons that would make switching to IOU a good idea.

  • IOU is very popular with many studying for the CCIE
  • There would be a common platform – it would make life easier when moving between different OSes.
  • It would also allow for a nicer experience with clickable pictures.
  • I could use “proper” switches (though if you are running GNS3 with IOU integration, you can use IOU switch images as well). The new volume will use a couple of switches (as will version 5).
  • The IOS images used would be more recent (but again, see the point above about GNS3/IOU integration
  • IOU is closer to the actual exam environment than GNS3 is.

I have added a poll on the right-hand side, where you can vote for your preference.

Let me know your thoughts in the comments section below.


  1. Anonymous May 28, 2015
  2. Stuart Fordham May 28, 2015
  3. Bernd May 30, 2015
  4. Stuart Fordham May 30, 2015
  5. Anonymous May 31, 2015