This post is the first in a series in which I’m going to describe various aspects of Cisco’s Application Centric Infrastructure (ACI). ACI, if you aren’t already aware, is a new DC network architecture from Cisco which uses a policy based approach to abstract traditional network constructs (e.g. VLANs, VRFs, IP subnets, and many more). What I’m not going to do in these posts is cover too many of the basic concepts of ACI – for that, I recommend you read the ACI Fundamentals book on cisco.com, available here. Instead, my intention is to cover the practical aspects of building and running an ACI fabric, including how to bring up a fabric, basic physical connectivity and integration with virtualisation systems. Read the rest of this entry »