When building leaf and spine networks, leafs connect to spines, but leafs don’t connect to leafs, and spines don’t connect to spines. There are exceptions to this and vPC is one of those exceptions. The leafs that are going to
Simulate a Silent Host in a VXLAN Network
I’m working on a blog post explaining route type 5 in EVPN. To demonstrate a scenario with a silent host, I want to simulate this behavior. Normally, hosts can be quite chatty and ARP for their GW, for example. In
Building a WAN Impairment Device in Linux on VMware vSphere
In some scenarios it is really useful to be able to simulate a WAN in regards to latency, jitter, and packet loss. Especially for those of us that work with SD-WAN and want to test or policies in a controlled
DevAsc – Some Handy Linux Commands
Introduction Linux is becoming more and more prominent in the networking industry. Many of us come from a mixed background and have varying levels of knowledge of Linux. I’ve been around Linux for a long time but really never got
Merry christmas – and some of my plans for 2014
I would like to wish everyone a happy christmas and a happy new year. 2014 is going to be a big year for me and I would like to describe some of the things that I plan for 2014. I
Dos2unix
There is a difference in how Windows and Unix-based systems end their lines. Why does this matter to us? When converting the configs for the INE workbook vol1 the configs have been made by someone using Windows. Windows uses a
Ubuntu on a stick
Since I have started studying for the CCIE I needed a lab. I don’t have the space/money to get a dedicated home lab so I have to use Dynamips and GNS3 instead. It is well known that Dynamips runs better