The setting of COS is the changing of a tag value within a vlan tagged packet. This means the COS is set and retained as long as the packets traverse trunks, yours is an access port so the COS will be retained only within VLAN 30. The next issue is the setting of the DSCP value which is a field within an IP packet, this is set on a layer three configured port ie:routed. This configuration is a layer two port.
If the COS is used, and it is routed or hits an access port the COS is stripped from the packet and lost. So if trunked links that pass VLAN 30 are suffering congestion then OK change the COS ( QOS only has an effect if the problem is congestion and there is a need for queueing to manipulate this ) otherwise no need to waste effort and electrons.
The DSCP value will need to be set on a port that has an IP address assigned to it ie: a routed port, usually the default gateway for the VLAN or a layer three egress point.
Wireshark will need to sniff a trunk port to see the COS field and values.
Usually the DSCP values for video and VOIP are set by the server in the IP packet and the switches just pass it through untouched.
Try applying the service policy at the default gateway and change the access list to pass the IP address of the video server.
We are pleased to announce availability of Beta software for 16.6.3.
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looking for early feedback from customers befor...
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