Re: Custom Queueing and packet size

From: Jung-I Lin (easyman.lin@gmail.com)
Date: Fri Oct 13 2006 - 00:40:37 ART


Hi, Michael
quotes from Cisco Docs

CQ was modified in Cisco IOS Release 12.1. When the queue is depleted early,
or the last packet from the queue does not exactly match the configured byte
count, the amount of deficit is remembered and accounted for the next time
the queue is serviced. Beginning with Cisco IOS Release 12.1, you need not
be as accurate in specifying byte counts as you did when using earlier Cisco
IOS releases that did not take deficit into account.

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_c/fqcprt2/qcfconmg.htm#wp1001336

HTH.

On 10/13/06, Michael Zuo <mzuo@ixiacom.com> wrote:
>
> Hi Group,
>
>
>
> I have a question re: custom queueing. When calculating the byte-count
> for each queue, does the packet size in each queue affect the
> calculation?
>
>
>
> Example:
>
>
>
> I want to allocation 20% to 1500 byte packets, 40% to 600 byte packets
> and 40% to the rest. To me, the byte-count would be 1500, 3000, 3000
> respectively just from normalizing the percentage allocation. But I
> have read from NetMaster library that the packet size for each queue is
> part of the calculation and there are various steps that need to be
> performed to arrive at an approximate percentage that comes close to the
> desired percentage.
>
>
>
> Can anyone shed some light on this?
>
>
>
> Thanks in advance...
>
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-- 
Thanks
Best Regards,

Jung-I Lin



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