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[ns] buffer limit DRR SFQ



Hello!
 
I don't understand very well the real meaning in queue objects of the parameters:
 
limit_
 
(in sfq)
maxqueue_
buckets_
 
(in drr)
blimit_
buckets_
 
which are the difference?
Is there anybody that can explain me in a clear way?
Are these parameters bounded each other? ( i.e. in DRR blimit_*buckets_=limit_ ????)
 
I read the ns manual but it is not very clear (i.e. about DRR,blimit_  indicates the shared buffer size in bytes....but which buffer???). 
 
thank you for your help.