From: david robin (robindavi@gmail.com)
Date: Wed Dec 27 2006 - 06:31:43 ART
Dear ALl,
I cant understand exactly the wtd thresholds configured in egress queue set
command
the following is an example from the documentation CD:
Switch(config)# mls qos queue-set output 2 buffers 40 20 20 20
Switch(config)# mls qos queue-set output 2 threshold 2 40 60 100 200
let's take an example is we have 400 buffers, then the first command
will allocate 40% for queue 1 and 20 percent for queue 2,3,4 --->
queue 1 will be 160 buffer, queue 2-4 wil be 80 buffer
for the second commad there is fine tuning in queue 2 i don't
understand deeply the configured values for drop threshold 1 and drop
threshold 2 ( 40 & 60) and I don't understand what they are
configured for.
the other two values I think they are as follow: 100 is the guaranteed
memory for the queue, it means the queue will ot put any excess
buffers to the allocated pools
and value 200 means that the queue can borrow double the the allocated
buffers---. ( 160x2) in case there is congetion, more than that it
will drop packets and I have another question here does 200 percent
means it will bowwo 160x2 buffers or will borrow only 160 additional
Please appreciate if any one can help because the doc cd is nit clear
at all, or if any body has a good documentation for that
thanks
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