SRR, shared mode still performs shaping ?

From: John Gibson (johngibson1541@yahoo.com)
Date: Mon May 14 2007 - 15:49:03 ART


I think when an ingress queue running in expedite
mode,
the SRR must be shaping the traffic. I don't
understand
why univercd says SRR at ingress does not shape.

Why I think when an ingress queue running in expedite
mode the SRR must be shaping the traffic ?

Consider we keep giving frames to the expedite queue
so that the expedite queue always has some frames to
send,

1. If SRR doesn't shape in this case, the expedite
   queue exhausts the whole bandwidth, then
   the "You can configure the bandwidth required for
   this traffic as a percentage of the total traffic
   by using..." is wrong. Because your configuration
   of bandwidth is ignored

2. If the expedite queue doesn't exhaust the whole
   bandwidth and stops sending frames in the expedite
   queue every once in a while so that the expedite
   queue doesn't consume more bandwidth than what you
   configure, then the expedite queue is not an
   expedite queue by definition.

3. The bandwidth you configure must be the upper limit
   of the expedite queue you want to impose. There
   is no such thing as configuring a minimum bandwith
   for an expedite queue. This discussion is over.

Why does univercd say SRR at ingress does not shape ?

Why ? Why ? Why ? Why ? Why ? Why ? Why ? Why ? Why ?

What is going on ?

Why ?

       



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