In this blast from the past (2011, to be exact), I finally found a blog that had previously only been on Cisco's blog site. Unfortunately, they killed it off a few years ago, but recently I've had to refer to it again thanks to some conversations about congestion and QCN.
So, instead of trying to find it over and over again, I've decided to post it here once more so that I can find it easily. Oh, and perhaps someone else may find it useful.
(For the record, this was the very first blog I did in the "Napkins Dialogues" format. I remember how nervous I was because it was so radically different than anything else that was out there at the time. Since then, there have been a few people who have adopted the style, and I'd like to think that maybe this one - and others like it - was an inspiration.)
Well, there you have it. The very first Napkins Dialogues. Nowadays, you don't hear much in the way of the kind of FUD thrown about like this. FCoE is still used, though the long and sordid story of the politics and people involved is best left for another day.
At the moment, perhaps the most useful part of these pictures is how QCN works, as it is still a viable option for handling congestion in Data Center networks.
Otherwise, hope you enjoyed a little blast from the past as much as I did.