A clean slate 4D approach to network control and management

Today's data networks are surprisingly fragile and difficult to manage. We argue that the root of these problems lies in the complexity of the control and management planes--the software and protocols coordinating network elements--and particularly the way the decision logic and the distributed-systems issues are inexorably intertwined. We advocate a complete refactoring of the functionality and propose three key principles--network-level objectives, network-wide views, and direct control--that we believe should underlie a new architecture. Following these principles, we identify an extreme design point that we call "4D," after the architecture's four planes: decision, dissemination, discovery, and data. The 4D architecture completely separates an AS's decision logic from protocols that govern the interaction among network elements. The AS-level objectives are specified in the decision plane, and enforced through direct configuration of the state that drives h...

• Type: Journal
• Year: 2005
• Where: CCR
• Authors: Albert G. Greenberg, Gísli Hjálmtýsson, David A. Maltz, Andy Myers, Jennifer Rexford, Geoffrey G. Xie, Hong Yan, Jibin Zhan, Hui Zhang
• Keywords: CCR 2005, Decision Plane, Extreme Design Point, Network Elements