IP video traffic should be given the same QoS considerations as IP voice traffic. Like IP voice traffic, IP video traffic should be correctly classified and marked or remarked, if necessary, when the traffic ingresses the network at the Access layer. This classification can be based on configured access lists or by using the switch port trust states as would be done for voice.
Following the correct classification and marking configuration at the Access layer, the network Distribution switches should be configured to trust the settings specified at the Access layer. There should be no marking or re-marking performed . . .
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