From: John Gibson (johngibson1541@yahoo.com)
Date: Wed Jun 13 2007 - 15:21:03 ART
Thanks.
I think I start to see the whole picture. But
I still have 1 question. What is the best
size for the adaptive-shaping interface-congestion?
If we back off nervously we are safer but we take
less advantage of adaptive shaping.
If we set the size big, we risk undiscriminating
dropping at the FIFO queue.
I need to lookup the command that shows the
FIFO queue. This is not 3560, not mls qos.
Must be show frame-relay pvc. Must be not
much different from the WFQ's show command.
This is just queue management after all.
John
--- Brian McGahan <bmcgahan@internetworkexpert.com>
wrote:
> minCIR is traditionally used for adaptive shaping
> with BECN,
> FECN, and Foresight. For example when BECN adapt is
> enabled and you
> receive a BECN from the Frame Relay network the
> shaping algorithm will
> incrementally slow down your sending rate either
> until BECNs stop being
> received or you reach the minCIR. Adaptive shaping
> to interface
> congestion is a relatively new feature, but uses the
> same concept. When
> the output queue length exceeds the configured value
> the shaper will
> back off either until the queue length drops below
> the configured value
> or you reach the minCIR, whichever comes first.
>
>
> HTH,
>
> Brian McGahan, CCIE #8593 (R&S/SP)
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
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>
> -----Original Message-----
> From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] On Behalf Of
> johngibson1541@yahoo.com
> Sent: Wednesday, June 13, 2007 11:23 AM
> To: ccielab@groupstudy.com
> Subject: frame-relay minCIR purpose ?
>
> I know this will slow down the shaping rate when
> adaptive-shaping interface-congestion [queue depth]
> is reached.
>
> But in one sentence, minCIR's purpose is to maintain
> discrimination on packets by letting them dropped
> in the shaping 4 queues rather than dropping
> at the single software queue. Right?
>
>
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