[cisco-voip] QoS for Circuit Emulation over IP ?

Jason Wydra jasonwydra at gmail.com
Thu Dec 27 20:14:10 EST 2007


Not sure about Aspect phones. Do they automatically mark for voice traffic?
If not, then I believe you need to manually mark voice traffic on the
ingress switch ports.

On Dec 27, 2007 6:22 PM, d4rk f1br <d4rkf1ber at gmail.com> wrote:

> I am in the midst of deploying two Cisco 2821's, each of them contain a
> NM-CEM-4TE1.  Each 2821 connects to a 6509.  Each 6509 is connected via gig
> fiber links.
>
> The T1 side of each 2821 connects to some Aspect system.
>
> Anyway, I have things up and working, the circuit emulation is working and
> the remote Aspect shelf comes up which in turn brings up the Aspect phones.
>
> Voice quality is not perfect though, and I need to figure out some QoS to
> try to ensure this traffic gets the highest priority.
>
> Not sure the best way to approach this, as I suck (MAJOR SUCK) at QoS, my
> track record thus far is umm... well lets move on, thank god for autoqos!
> :-)
>
> My guess is I have to do something on the 2821s although I am not sure if
> that really is needed since the only thing the 2821's do is handle this
> single T1.
>
> I am certain the 6509's are going to need something to prioritize the
> traffic coming in from the 2821's and ensure that this traffic takes
> precedence both coming in and leaving.
>
> I got the QoS SRND (my Cisco sales engineer sent it to me when I asked
> about suggestions related to this)  gee thanks huh... 300+ pages of qos
> material... yeah!
>
> Trying to narrow down what I need to look for and research, not asking for
> a cut and paste example config, as I know every network is different.  I am
> just not sure where to approach this from.
>
> Anything special about the circuit emulation I would need to consider, do
> I tag it some how the same as my other voip traffic for the cisco phones?
> Not sure where to start looking you know, so any suggestions or tips would
> be appreciated.
>
> Thx!
>
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