From: david robin (robindavi@gmail.com)
Date: Wed Jan 17 2007 - 04:58:25 ART
many thanks BOb,
so it like the expedite queuing just ignore the queue in which shaped
weights are configured.
On 1/16/07, Bob Sinclair <bsinclair@netmasterclass.net> wrote:
>
> Dave and all:
>
> Correction to earlier:
>
> Shaped weights both reserve and limit, whereas shared weights just
> reserve.
>
> The shaped queue weights are not considered in the shared weight
> calculation. The ratio of the shared weights determines the relative
> bandwidth allocations of the bandwidth remaining after the shaped
> reservation.
>
> Imagine this example on a 100 Mbs link:
>
> srr-queue bandwidth shape 2 0 0 0
>
> srr-queue bandwidth share 1 2 2 1
>
>
> I believe these would be the resulting reservations, in terms of Mbs:
>
> Queue 1: 50 Mbs (reserved and limited 1/2 times 100 Mbs)
> Queue 2: 20 Mbs (reserved 20/(20 + 20 + 10) times 50 Mbs)
> Queue 3: 20 Mbs (reserved 20/(20 + 20 + 10) times 50 Mbs)
> Queue 4: 10 Mbs (reserved 10/(20 + 20 + 10) times 50 Mbs)
>
> Difficult to verify in practice.
>
> HTH,
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> david robin
> Sent: Tuesday, January 16, 2007 9:06 AM
> To: Cisco certification
> Subject: 3560 help me please
>
> Dear all,
> I can't understand some issus in SRR shaping and sharing in 3560 switch,
> the
> doc CD said that shaped configuration override sharing, and the default
> configuration is as follow for the 4 queues
>
>
> SRR shaped weights (absolute)
> 1<
> http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3560/12235se/scg1/s
> wqos.htm#wp1202389>
>
> 25
>
> 0
>
> 0
>
> 0
>
> SRR shared weights
> 2<
> http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3560/12235se/scg1/s
> wqos.htm#wp1202394>
>
> 25
>
> 25
>
> 25
>
> 25
>
> now in case that I confugre q1 to be 8% insetead of 25 %, this mean that
> this queue will be limited to 1/8 percent of the total bandwidth, up to
> this
> limit that's fine.
> now the others queues will share the bandwidth based on their SRR shared
> level,
> the question is
> does queue 1 enter the shared calculation
>
> on other words the calculation for queue 2 for example will be:
> 25/(25+25+25+25)
> or
> 25/(25+25+25) and ignoring queue 1 weight
>
> and what is the case if I configure shape for example o a big value 50%
> what
> will be the situation
>
> thanks in advance,
>
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