QoS feature question

[egua5261]

Hi There,

I'm hoping someone can help sharing feeback in relation to choosing the apropriate QoS feature to apply to traffic in our internet link.

I need to make sure that at any one time during congestion there is enough capacity, say about 2mbps, for video traffic (rtsp, quicktime) and voice traffic reserved; so that even if other applications run then video conferencing with third parties over the internet during congestion will not get affected.

I'm not sure whether i need to mark/classify the packets to provide priority for these to leave the network on the internet router or if simply reserving 2mbps for this type of traffic?

I'm aware that once the packets leave the internet router and enter the internet the marking on the packets will not take effect any more so in this case what would happen to video traffic on the way back. Can i mark the packets as they enter our internet router again?

Can any one please help clarifying this?

[egua5261]

The main site has one physical link to our IP WAN supplier's cloud. I've checked with the supplier and they confirmed they provide a dynamic QoS service, which enables traffic classified by us to be prioritised through the IP WAN and queued to our router in a manner appropriate to ensure priority traffic flow (egress queuing).

Traffic marked with the following classifications will be prioritised to provide the QoS parameters for matching traffic type: (i'm only showing 3 classes but the suplier follows a 6-class model)

* Multimedia: ToS: 5,6,7; DSCP: 40.46.48.56; PHB: EF, CS5, Cs6, CS7; Queuing: Priority/LLQ; BW%: 100

*Mission critical data: ToS: 4, DSCP: 32,34,36,38; PHB: AF4x, CS4; Queuing: CBWFQ; BW%:40

*Data Transfer: ToS: 1, DSCP: 8, 10, 12, 14; PHB: AF1x, CS1; Queuing: CBWFQ; BW%= 10.

So in this case classification and marking, Traffic shaping and egress queuing based on subscribed rate are supported on the IP WAN. However this is not the case in the internet link...

Esteban