From: maureen schaar (maureen.schaar@gmail.com)
Date: Thu Apr 12 2007 - 16:23:28 ART
Hi,
DSCP queue mapping overrides COS. Here's a quote from Cisco's
enterprise qos solution reference network design guide on page 110
(section about 2970/3560/3750 qos):
While DSCP-to-Queue/Threshold maps override CoS-to-Queue/Threshold
maps, these mappings should be as consistent as possible to ensure
predictable behavior and simplify troubleshooting.
http://www.cisco.com/application/pdf/en/us/guest/netsol/ns432/c649/ccmigration_09186a008049b062.pdf
Maureen
On 4/12/07, ccie anees <ccieanees@yahoo.com> wrote:
> Hi,
>
> I have configured CoS to input Queue and DSCP to input queue. If I receive a frame with CoS = 3 and the DSCP 24, which Queue The switch will place based on the below output.
> CoS-input-Q maps CoS 3 to Queue 2
> DSCP-input-Q maps DSCP 24 to Queue 1
>
>
> Switch#show mls qos maps cos-input-q
> Cos-inputq-threshold map:
> cos: 0 1 2 3 4 5 6 7
> ------------------------------------
> queue-threshold: 1-1 1-1 2-1 2-1 2-1 2-1 2-1 2-1
>
>
> Switch#show mls qos maps dscp-input-q
> Dscp-inputq-threshold map:
> d1 :d2 0 1 2 3 4 5 6 7 8 9
> ------------------------------------------------------------
> 0 : 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01
> 1 : 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01
> 2 : 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01
> 3 : 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01
> 4 : 02-01 02-01 02-01 02-01 02-01 02-01 02-01 02-01 01-01 01-01
> 5 : 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01
> 6 : 01-01 01-01 01-01 01-01
> Thanks,
>
> Anees.
>
>
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