By 2003, Cisco IT - propelled by both business and technology drivers - was ready to develop a second version of QoS, referred to internally as QoS V2. They needed a comprehensive, end-to-end solution that addressed the network consistently across user devices from the LAN edge to the enterprise WAN edge. Keeping in mind its primary goal of building QoS based on trusted network edges, the Cisco IT design team established other requirements for QoS V2, including: Consistent performance and management standards across the LAN and WAN networks, the lowest-possible latency for voice applications, the ability to limit bandwidth consumption by large data transfers during times of traffic congestion etc.
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