Differentiated services (DiffServ) are a set of technologies used to enable the provisioning of class-based, differentiated quality of services. One of the essential building blocks to realize DiffServ is the use of traffic conditioning mechanisms to support the required forwarding behaviors. In this paper, a generic model for traffic conditioning is proposed. The generic traffic conditioner (GTC) can be used to provide the traffic control functionalities required in support of various defined per-hop forwarding behaviors. To demonstrate this capability, a configuration of GTC for an expedited forwarding (EF) service that guarantees low packet loss, delay and jitter bounds is presented. Per-hop delay due to traffic conditioning is briefly analyzed. The GTC is currently implemented in Linux platform. Experimental results show that the GTC can achieve minimal packet loss with bounded jitter and delay. Keywords--- Quality-of-Service Network, Differentiated services, Traffic Conditioning ..
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