[c-nsp] QoS question

[Collins, Richard (SNL US)]

Hi,

I would be just curious on a few further details.
I have seen the option to use under class-map
match ip rtp 16384 16383

I interpret this to mean to match the even port numbers used by rtp but
you are missing control messages (rtcp) - therefore only matching
payload.
Is there some other reason to prefer the match command (match protocol
rtp audio)?
If you don't have nbar how do you match the rtcp - udp port range?

Thanks
Richard

>Date: Tue, 20 Feb 2007 20:50:08 -0600
>From: "Nick Griffin" <nick.jon.griffin at gmail.com>
>Subject: Re: [c-nsp] QoS question
>To: "Joseph Jackson" <JJackson at aninetworks.com>
>Cc: Cisco-NSP Mailing List <cisco-nsp at puck.nether.net>
>Message-ID:
>       <a2b352c40702201850q33559c9bi930f8c0c5bbd5f66 at mail.gmail.com>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>Joseph, when congestion is not occuring, bandwidth allocated to the
priority
>queue will be available for use by other traffic. Be sure your nbar
matching
>actually does match the particular audio and video you wish to match.
I'm
>not sure about the Video port numbers used by nbar right off hand, but
the
>RTP is 16384 to 32767. You might also want to match the traffic on the
>ingress with a different class map and use a new policy to set your
dscp
>values, as opposed to doing it on the egress. I've ran into issues in
the
>past with order of operations.
>
>HTH
>
>Nick Griffin
>
>
>On 2/20/07, Joseph Jackson <JJackson at aninetworks.com> wrote:
>>
>> Hey guys,
>>
>>         I'm working on getting QoS setup on my WAN links for voice
and
>> video.  Here's the config example I've worked up.
>>
>>
>> class-map match-any video-voice
>> match protocol rtp audio
>> match protocol rtp video
>>
>>
>