Re: OT:QOS understanding

Joe,
I am running qos on the 3750x, I have tried trusts for dscp, ip prec and
even tried auto trust for phone. I look at maps, but nothing states TOS to
dscp mapping.
On Jun 16, 2011 1:40 PM, "Joe Astorino" <joeastorino1982_at_gmail.com> wrote:
> Do you have "mls qos" or any other qos configuration on the 3750x switch?
> On your core switch, do you trust markings?
>
> On Thu, Jun 16, 2011 at 4:34 PM, Dennis Worth <dennis.worth_at_gmail.com
>wrote:
>
>> Hi Group,
>>
>> I was working on an access-layer routed approach config, and trying to
>> understand the marking of QOS TOS from the switchport level.
>>
>> I have an IP phone on a 3750X switch that then gets routed to a a core
>> switch. What I am not seeing is a marking of the voice traffic from say
>> vlan
>> 20. I created an ACL on the routed interface at core switch to match IP
>> PREC, DSCP values, but nothing seems to match. According to my config on
>> the
>> Voip phone it should be TOS = A0 or IP PPREC 5 or what I thought was EF.
>>
>> I am guessing that the TOS byte is just not being automatically mapped to
>> DSCP, but not real sure.
>>
>> Thanks for any help guiding me through this.
>>
>> --
>> Dennis Worth
>>
>> "Of all men's miseries the bitterest it this: to know so much and to have
>> control over nothing."
>> --Herodotus
>>
>>
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>
>
> --
> Regards,
>
> Joe Astorino
> CCIE #24347
> Blog: http://astorinonetworks.com
>
> "He not busy being born is busy dying" - Dylan

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Received on Thu Jun 16 2011 - 14:21:16 ART