[nsp] traffic-shape weirdness

From: Charlie Watts (cewatts@frontier.net)
Date: Wed Mar 28 2001 - 05:07:14 EST

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I'm confused about something.

If I do "traffic-shape rate 256000" on an interface, it appears in "sh
run" as:

traffic-shape rate 256000 7936 7936 1000

If I do a "traffic-shape rate 262144", it appears as:

traffic-shape rate 262144 32768 32768 1000

My understanding is that the defaults for burst-size and excess-burst size
are bit-rate/8; is that correct?

Is it a bug that non-power-of-two bit-rates don't get the right default
burst and excess burst sizes?

[ Other power-of-two bit-rates also give the 'expected' default burst-size
and excess-burst-size figures: bit-rate / 8. ]

I think I don't understand the ramifications of burst-size. If
burst-size/bit-rate is the interval, can the burst-size be larger than the
bit-rate? Does that make -sense- to do?

What are the ramifications of burst-size larger than bit-rate, and
vice-versa?

-- 
                          "Ships ahoy!" said Tom fleetingly.  
                          
Charlie Watts             
cewatts@frontier.net

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