Re: OT: Catalys 6500 qos policing doubts

Carlos, maybe i am misunderstanding the 15.0.1 IOS for 6500 config notes ,
but at:

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/15.0SY/configuration/guide/qos_class_mark_police.html

you can see this note at "Overview of Policing":

"For all policers, PFC QoS uses a configurable global table that maps the
internal DSCP value to a marked-down DSCP value. When markdown occurs,
PFC QoS gets the marked-down DSCP value from the table. You cannot specify
marked-down DSCP values in individual policers."
I am trying to do this:

-mark some types of traffic entering Cat6500 layer 2 interfaces using
different DSCP values
-policing these same flows previously marked at a different output
interface (layer 3 interface of the same 6500) , by matching them
using dscp values "assigned" on the input. Then, i do not see clearly if
the comment "You cannot specify marked-down DSCP values in individual
policers." is a restriction for this type of config (i have done a SPAN of
the output traffic, and i can not see the new dscp values... maybe this is
normal because the dscp assigned at the input is only an "internal dscp" ??)

Many thanks newly & Best Regards

2012/5/21 Carlos G Mendioroz <tron_at_huapi.ba.ar>

> Where did you read that ?
> AFAIK, you can mark on input and do congestion management on output even
> on a 6k.
> -Carlos
>
> JuanF @ 21/05/2012 15:40 -0300 dixit:
>
> Hi all,
>>
>> I have a 6509 Catalyst with:
>> -Supervisor card 2T
>> -Ios 15.0.SY1
>>
>> I need to do a QoS policing configuration on this hardware, with these
>> conditions:
>>
>> -Mark Dscp value from some types of IP traffic on several layer2 INPUT
>> Interfaces of the 6509
>> -Use these DSCPs marks to aply different QoS policings to these flows
>>
>> Is it possible to do all this by configuring only the 6500 switch? (this
>> is,
>> without depending of matching the dscp value marked by a diferent
>> device). I
>> read you can not mark the Dscp on the 65000 and also manipulate the same
>> traffic using these Dscps values locally asigned on the 65000.
>>
>> TIA and Best Regards
>>
>>
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>>
> --
> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>

-- 
Juan Faure
Blogs and organic groups at http://www.ccie.net