Date Added: Jan 2010
Keeping latency in check is critical for Quality of Service (QoS) of demanding Ethernet wireless backhaul, wholesale and business services. Given that Ethernet bandwidth is considered relatively 'Inexpensive', some providers increase throughput to reduce latency and keep performance within strict SLA tolerances. However, the relationship between bandwidth and latency is anything but simple in packet-based networks, where increasing throughput can sometimes have no effect on delay, or even increase it under certain conditions. This paper explores the key sources of delay, and techniques to optimize latency without consuming excess bandwidth. These guidelines allow providers to use their network resources as efficiently as possible, while assuring the QoS of critical, real-time services.