image: t2now

WAN Design Is Changing: What That Means for You

August 28, 2017

Have you noticed that WAN design is changing? Well, I think it is, and I’d like to share my thoughts.


Old TDM networks used to be “random” meshes of T1s, etc. Part of what drove the design was mileage-centric costs, so one would interconnect nearby sites and end up with a network that looked sort of like chicken wire fencing. Capacity planning was painful, as was multi-hops and latency. And the mesh-iness tended to aggregate traffic, thereby aggravating congestion and cost.

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