Recent posts

Download & Install Nexus 1000v For Free!

November 08, 2012 | 1 minute read

Cisco has recently announced that the Nexus 1000v can be downloaded and installed free of charge. This is great news for those of us who use VMware products, and especially great news for those of us who have home labs and can’t afford to spend large sums of money on licences. Using this excellent guide, you will be able to build an entire virt...

Saving GNS3 Topologies

September 01, 2012 | 2 minute read

A lot of people (myself included) have had trouble saving their GNS3 topologies properly. You think you’ve done it properly, only to find the next time you open the topology, some or all of the devices have lost their configurations. This can be very frustrating, especially if it was a large and complex network. The solution I found, which is m...

MTU Vs MSS - Part One

February 17, 2012 | 3 minute read

Have you ever seen the below configuration and wondered what these commands do? And why the MSS value always seems to be 40 bytes lower than the MTU? interface Dialer1 ip mtu 1440 ip tcp adjust-mss 1400 Well, over the course of my next couple of blog entries, I plan to tell you all about them. From my countless number of Google searches, t...

GNS3 IOS Memory Errors - Solution

February 10, 2012 | 2 minute read

In a previous post I talked about GNS3 memory errors that produced the below log messages when certain IOS images were used and NATing was enabled: R1(config)#int fa0/0 R1(config-if)#ip nat inside % NBAR ERROR: parsing stopped % NBAR Error : Activation failed due to insufficient dynamic memory % NBAR Error: Stile could not add protocol node %NA...

About Me

November 13, 2011 | 3 minute read

Original (November 2011): 2015 Update: See this page to find out what I’ve been up to over the years since this entry was originally posted. I have received a few e-mails from readers asking me questions about myself and what I do, so I thought I’d write a blog entry about it. I’m a 27 year old Cisco network engineer living in Australia. I wo...