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lildeezul wrote: more knowlege to me class maps are used for classification and policy maps are used to determine what to do with the packet based on the class map and you can apply policy maps via the SERVICE-POLICY interface config command. i think im getting it..........but i am getting confused here.... i THOUGHT that classification is based on ingress traffic, but jeremy mentioned that you can use marking on ingress/egress frames..... i though marking would only be on egress frames/packets ( based on Cos or IPpred/dscp) to ease the process for other routers so they do not have to deeply inspect packets. this above confuses me.. if marking is done on ingress frames then isnt that the same as classifying data ???? that confuses me. oh wait.. i think i see where we would mark ingress... lets say for examply off the router port their is a ip phone... if the IPphone is capable of marking thier own data on egress data, via cos 5 ( maps to dscp 40) but the router treats dscp 40 as low traffic priorty, then we would need to mark packets ingress that have a value of CoS 5 (DSCP 40) to a different value so it can use it as a internal DSCP. would that be an example of this situation of marking ingress ??
ahah haa thanks. I understand it now. Thanks for that enlightment.. Yeah i really want to learn this QoS stuff, its very interesting, and hard at the same time. I am also going to do the QoS exam for the CCIP at the same time as the ONT exam. but based all the above information, does it seem like im getting these concepts down.
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