Saku Ytti wrote: > No, you're not crazy. If your core is higher rate than your customer, then > you need at minimum serialization delay difference of buffering. > If core is 10G and access 100M, you need buffer for minimum of 100 packets, > to handle the single 10G incoming, without any extra buffering.
The required amount of memory is merely 150KB. > Now if you add QoS on top of this, you probably need 100 per each class you > are going to support. If you have 10 classes, it is still 1.5MB. > And if switch does support QoS but operator configures only BE, and > operator does not limit BE queue size, operator will see buffer bloat, 1.5MB @ 10Gbps is only 1.2ms, which is not buffer bloat. Masataka Ohta