Accessing the Network Camera - Tecnoalarm

VIVOTEKQoS (Quality of Service) Advanced ModeQuality of Service refers to a resource reservation control mechanism, which guarantees a certain qualityto different services on the network. Quality of service guarantees are important if the network capacityis insufficient, especially for real-time streaming multimedia applications. Quality can be defined as, forinstance, a maintained level of bit rate, low latency, no packet dropping, etc.The following are the main benefits of a QoS-aware network:■ The ability to prioritize traffic and guarantee a certain level of performance to the data flow.■ The ability to control the amount of bandwidth each application may use, and thus provide higherreliability and stability on the network.Requirements for QoSTo utilize QoS in a network environment, the following requirements must be met:■ All network switches and routers in the network must include support for QoS.■ The network video devices used in the network must be QoS-enabled.QoS modelsCoS (the VLAN 802.1p model)IEEE802.1p defines a QoS model at OSI Layer 2 (Data Link Layer), which is called CoS, Class ofService. It adds a 3-bit value to the VLAN MAC header, which indicates prioritization from 0~7 (Eightdifferent classes of service are available). The priority is set up on the network switches, which then usedifferent queuing disciplines to forward the packets.Below is the setting column for CoS. Enter the VLAN ID of your switch (0~4095) and choose the priorityfor each application (0~7).If you assign Video the highest level, the switch will handle video packets first.NOTE► The web browsing may fail if the CoS setting is incorrect.► Class of Service technologies do not guarantee a level of service in terms of bandwidth and deliverytime; they offer a "best-effort." Users can think of CoS as "coarsely-grained" traffic control and QoS as"finely-grained" traffic control.► Though CoS is simple to manage, it lacks scalability and does not offer end-to-end quarantees since itis based on L2 protocol.44 - User's Manual