Non Broadcast Multi-Access (NBMA) clouds such as Frame Relay or X.25, are always a challenge. The combination of low bandwidth and too many link-states is a recipe for problems. A partial mesh topology has proven to behave much better than a full mes...
http://www.ebrahma.com/2013/10/non-broadcast-mode-full-mesh-vs-non-broadcast-mode-partial-mesh/Labels: Full-Mesh, full-mesh-topology, Non-Broadcast-Mode-(Full-Mesh), Non-Broadcast-Mode-(Full-Mesh)-Vs-Non-Broadcast-Mode-(Partial-Mesh), Non-Broadcast-Mode-(Partial-Mesh), Partial-Mesh, partial-mesh-topology