[c-nsp] QoS question

[Nick Griffin]

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
>
>
>
> policy-map Voice-Video-serial0/0/0
> class video-voice-serial0/0/0
>    priority percent 70
>    set dscp ef
>
> interface Serial0/0/0
> description WAN
> ip address 10.224.8.77 255.255.255.252
> no ip redirects
> no ip unreachables
> no ip proxy-arp
> ip nbar protocol-discovery
> encapsulation ppp
> ip route-cache flow
> service-policy output voice-video-serial0/0/0
>
>
>
>
>
>
> Most of the WAN connections are t1s going back to our HQ.   I was
> wondering if setting the priority percent 70 means that 70 % of
> bandwidth will ALWAYS be reserved for video/voice or if it will
> dynamically allocate bandwidth to the queue as needed...
>
>
> Thanks for the help!
>
> Joseph
>
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