Scaling EIGRP networks with stub routers
The April IP Corner article describes EIGRP stub routers, a feature that can significantly improve the stability of large EIGRP networks. I'm describing the theory behind EIGRP stub routers, how they reduce EIGRP traffic and decrease the convergence times in large hub-and-spoke networks as well as how you use undocumented IOS features to build fully redundant dual router stub sites.