When you are building a data center fabric, should you run a control plane all the way to the host? This is question I encounter more often as operators deploy eVPN-based spine-and-leaf fabrics in their data centers (for those who are actually deploying scale-out spine-and-leaf—I see a lot of people deploying hybrid sorts of networks designed as “mini-hierarchical” designs and just calling them spine-and-leaf fabrics, but this is probably a topic for another day). Three reasons are generally given for deploying the control plane all on the hosts attached to the fabric: faster down detection, load sharing, and traffic engineering. Let’s consider each of these in turn.
If “experience is merely the name men gave to their mistakes,” as Oscar Wilde puts it in The Picture of Dorian Gray, then the more we know about the threats we face and how we react to these threats, the better our chances are of keeping our data secure and our company’s name out of the headlines for all the wrong reasons. —Anastasios Arampatzis
In this episode of the Hedge, Stephane Bortzmeyer joins Alvaro Retana and Russ White to discuss draft-ietf-dprive-rfc7626-bis, which “describes the privacy issues associated with the use of the DNS by Internet users.” Not many network engineers think about the privacy implications of DNS, a important part of the infrastructure we all rely on to make the Internet work.