Hi, Sorry for noob questions but I have been reading about qos for a long time and trying to grasp it. I have simple LAN topology in one of our sites:
PC-->2960x-->4506-->MPLS router(with qos enabled)<---Nexus<---SfB server
I'd like to implement qos only for Skype for business - our sysadmin has enabled dscp marking on the PC's and SfB - voice gets DSCP 46 and video 34. I have tested it via iperf and ping with tos values - markings are preserved end-to-end.
My understanding is to do 1p3q3t on the 2960x(thats where they can run out of bandwidth) and only put dscp 46 in threshold 1 and dscp 34 to priority queue threshold 2. Rest of the traffic will go to other classes as specified in the recommended 1p3q3t design.
I am puzzled when it comes to the policing - do I have to do it? From my understanding if buffers and thresholds are divided less important dscp values will get dropped. So if the buffer is full priority queue will get served first and q4 will get dropped and then q3 and so on? If that's correct understating - why do we need policing on the physical interface at all?
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