From: Chris Lewis (chrlewiscsco@gmail.com)
Date: Wed Mar 08 2006 - 11:30:56 GMT-3
That command sets the priority bandwidth size. Deciding what that should be
is somewhat of an art rather than science.
An excellent resource for this is the Enterprise Quality of Service
SRND 3.2<http://www.cisco.com/univercd/cc/td/doc/solution/esm/qossrnd.pdf>
at
http://www.cisco.com/warp/public/779/largeent/it/ese/srnd.html
First you have to know what codec you are using, each codec will consume a
different amount of bandwidth. then you have to decide how many simultaneous
calls you want over the link. So for arguments sake you choose a codec that
consumes 24K per call and you want three simultaneous calls, that means a
total of 72K. Now that would be fine to set as your bandwidth if you
disregard signaling and don't concern yourself with the fact that it is
unlikely that three phones will be sending packets evenly spaced to the
router for transmission over the frame link. The phones are connected on
ethernet, so if all 3 phones are transmitting at once, you will get bursts
that go over 72K for short periods of time that need to be transmitted.
A really safe recommendation is to double the bandwidth required for the
number of simultaneous calls you want to support. This may sound excessive,
but remember, the priority queue will only take the bandwidth when it needs
it, if there are no bursts that bandwidth is still available for other
traffic.
Chris
On 3/7/06, imam@intikom.co.id <imam@intikom.co.id> wrote:
>
> I have tried looking for how Implementation Voip o FR and I got url link
> like this
>
> http://www.groupstudy.com/archives/ccielab/200110/msg01064.html
>
> but any body know how do I calculate bandwidth in command " frame-relay
> ip rtp priority <udpport> <udpport> <bandwidth>
>
> need your advice
>
> rgds
> Imam R
>
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