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Quality of Service overview

On the Passport 1600 Series switch, traffic prioritization allows you to manage bandwidth allocation for traffic flows on the LAN. These traffic flows are switched and routed in hardware at Layer 2 level. At the Layer 3 level, traffic flows on the LAN are routed at through a differentiated services (DiffServ) network architecture.

Traffic filtering is a mechanism that helps you to manage traffic by defining filtering conditions and associating these conditions with specific actions. Within a DiffServ network IP filtering allows you to assign QoS levels based on a range of filtering conditions.

Within the DiffServ network, the marked packets are placed in a queue according to their marking. For example, if a video stream is marked to receive the highest priority, it is placed in a high-priority queue. As those packets traverse the DiffServ network, the video stream is forwarded before any other packets.

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