You have the general topology right, but not all nodes necessarily have to be agents. You could, forinstance, run an agent next to a bind server and delegate th

You have the general topology right, but not all nodes necessarily have to be agents. You could, forinstance, run an agent next to a bind server and delegate the .consul. Zone to it. That way for nodes which only use DNS for discovery can work I modified. In general you are going to set up an N+M topology of n servers and n+m agents -- but for a network of 100k nodes does consul scale to 100k agents? Plus what goes unstated is how those 100k nodes are laid out in DCs and racks. Anyway, this isn't to slag on consul. I think consul is like chocolate and peanut butter. I use it in my mesos cluster and just am genuinely curious how large it can scale!