Yoshihiko Sakata

High-speed IPv6 router/switch architecture

To construct a high-speed and reliable IPv6 network that supports an information society, a high-speed router and switch architecture and new quality of service (QoS) control mechanisms have been developed. The architecture that adopts distributed hardware engines for IPv4 and IPv6 packets achieves wire-rate forwarding for 10 gigabit Ethernet. The QoS control mechanisms, by controlling hierarchical bandwidths, can guarantee the communications of important data such as mission critical data for each network user, assuring bandwidths for each user. A next generation router (GR4000) and a switch (GS4000) based on this architecture provide 320 Gbps maximum capacity with the QoS control mechanisms as well as flow filtering and flow-statistics collection.

Evaluation of a Hierarchical Shaper as a Policy Execution Point

The Next Generation Network (NGN) is expected to become the most important infrastructure for various services used for e-Business such as telephone services, Internet services and new generation broadcasting services. It is supposed to be integrated into all IP network. To satisfy various Quality of Service (QoS) requirements of these services not only for each service but also for every user, we have developed a hierarchical shaper. The shaper has been implemented in a QoS aware gigabit router environment. Although this shaper has to be evaluated to manage actual traffic, the influence of various network conditions on bandwidth control has not been studied thoroughly. This paper reports some experimental results and clarifies the characteristics of the shaper.