But giving it a second thought... If you have "mls qos trust device
cisco-phone" on the same port there is a chance it could work as you expect.
But I'd believe it, if I saw this in cisco docs :)


On Wed, Jan 26, 2011 at 21:31, Miron Kobelski <findko...@gmail.com> wrote:

> With your configuration you would trust ANY dscp marking received from the
> IP phone port. No matter if it was sent by cisco ip phone or a rogue PC
> behind it.
> You loose the benefit of conditional trust boundary... I suspect that these
> tasks are contradictory.
>
> regards
> kobel
>
>
>
> On Wed, Jan 26, 2011 at 21:28, Friderich Claude <cfrider...@netcore.lu>wrote:
>
>>  Hello Miron,
>>
>>
>>
>> I agree with you and the same remark in the attached file p.4
>>
>> You can use either one of these three methods. You cannot use more than
>> one method in a port. For example,
>>
>> you have configured the mls qos trust cos command on a port. When you
>> configure the port with the
>>
>> service−policy input <policy−map−name> command, it removes the mls qos
>> trust cos command
>>
>> automatically.
>>
>>
>>
>> I think we have to put the service-policy input <policy-map> with the
>> following class-map in this policy-map
>>
>>
>>
>> policy-map myname
>>
>> class myname
>>
>> trust dscp
>>
>>
>>
>> and create the class before with a match ip dscp ef
>>
>>
>>
>> My opinion …. But remarks appreciated J
>>
>>
>>
>> Regards
>>
>> Claude
>>
>>
>>
>> *Claude Friderich*
>>
>> *PreSales Support*
>>
>> *[image: ccvp_voice_sm]***
>>
>> *NETCORE PSF S.A.***
>>
>> 49 rue du Baerendall
>>
>> B.P.65 L-8201 Mamer
>>
>> Téléphone: 31 33 80-407
>>
>> Fax: 31 33 80 8-407
>>
>> GSM: 621 303 616
>>
>> E-mail: cfrider...@netcore.lu
>>
>>
>>
>> *From:* ccie_voice-boun...@onlinestudylist.com [mailto:
>> ccie_voice-boun...@onlinestudylist.com] *On Behalf Of *Miron Kobelski
>> *Sent:* mercredi 26 janvier 2011 19:07
>> *To:* ccie_voice@onlinestudylist.com
>> *Subject:* [OSL | CCIE_Voice] 3750 QoS: service-policy + mls qos
>> trustcommands on the same port
>>
>>
>>
>> Hello,
>>
>> I'm working on Vol2 Lab8 QoS section. Task 5.2 requires to conditionally
>> trust DSCP markings from the Cisco IP phone, which can be accomplished with:
>>
>> mls qos trust device cisco-phone
>> mls qos trust dscp
>>
>> But 5.3 requires policing and remarking using service-policy for the same
>> switch port.
>> In the Enterprise QoS SRND page 106 we have:
>>
>> At the time of writing, the Catalyst 2970/3560/3750 does not support a
>> trust statement (such as mls qos
>> trust device cisco-phone) in conjunction with a service-policy input
>> statement applied to given port at
>> the same time. While this may be configurable, if the switch is reset, one
>> or the other statement may be
>> removed when the switch reloads. This limitation is to be addressed;
>> consult the latest Catalyst
>> 2970/3560/3750 QoS documentation for updates on this limitation
>>
>> PG's solution seems to ignore this fact. What's your opinion on this? I
>> was unable to find anything on this in the archive.
>>
>> BTW, how can I find QoS SRND via cisco.com documentation portal?
>>
>> regards
>> kobel
>>
>>
>>
>> --
>>
>> This email was Anti Virus checked.
>>
>>
>

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