Re: Voice Traffic

Well the 711 Codec will depend on where you are, if you are in US or North
America the payload type is "0" But if you are outside of this region it's
"3" A-law versus U-law. I found that being very specific like this you
eliminate the chances of matching other apps/traffic that use the same
marking.

On Tue, Sep 7, 2010 at 1:53 AM, Ryan West <rwest_at_zyedge.com> wrote:

> Kazi,
>
>
>
> Here are the QoS related portions for CME.
> http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/srnd/design/guide/nstrct.html#wp1046368
>
>
>
> For the topology-aware CAC that frog was mentioning, check here:
> http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/netstruc.html#wp1044270
>
>
>
> -ryan
>
>
>
> *From:* Kazi Junaid [mailto:junaidkazi76_at_gmail.com]
> *Sent:* Monday, September 06, 2010 11:19 AM
> *To:* Radioactive Frog
> *Cc:* Ryan West; Narbik Kocharians; karim jamali; Cisco certification
> *Subject:* Re: Voice Traffic
>
>
>
> Hi
>
> QOS is not going to be easy, I am aware of that.
> Getting input from you experts will help. Can you share the IPTEL Document
> link referring to QOS if available with you.
>
> thanks
> JK
>
> On Mon, Sep 6, 2010 at 2:42 PM, Radioactive Frog <pbhatkoti_at_gmail.com>
> wrote:
>
> Kazi,
>
> it's not that easy as you're thinking in MPLS environment. Most voiper
> won't even think about the topology. There is an issue with call manager CAC
> in MPLS environment.
>
> In most cases MPLS is not hub-n-spoke.
> the bottom line is, You must use RSVP for QoS in MPLS environment.
>
> read why you need it on IPTEL design document and you shoudl be fine.
>
> re protocol matching, just use the NBAR as it's preferred method. The port
> mapping was the only method when NBAR was not out.
> All 12.4x codes have pretty decent NBAR.
>
> HTH
>
> -frog
>
> On Mon, Sep 6, 2010 at 6:08 PM, Kazi Junaid <junaidkazi76_at_gmail.com>
> wrote:
>
> Thanks U all for the support.
>
>
>
>
> On Mon, Sep 6, 2010 at 10:56 AM, Ryan West <rwest_at_zyedge.com> wrote:
>
> > Kazi,
> >
> > As usual, I'm a little too terse in my reply. There are a couple of
> > reasons you want to trust as close to the edge as possible and accept the
> > markings from the phone. Most likely, your gateway or MPLS router is an
> > ISR, a software based router. Deeper packet inspection to determine RTP
> > payload is going to use CPU resources and you'll most likely remark the
> > packets to EF anyhow. The MPLS provider is going to use the DiffServ
> > markings to classify your traffic (assuming you've paid for it) into the
> EXP
> > bits and set policy based on them.
> >
> > http://www.cisco.com/warp/public/cc/pd/iosw/prodlit/nbarw_wp.htm
> >
> > -ryan
> >
> > > -----Original Message-----
> > > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On
> > > Behalf Of Ryan West
> > > Sent: Monday, September 06, 2010 3:33 AM
> > >
> > > match protocol rtp payload-type "0, 15"
> > >
> > > Most installations just trust the markings from the phone and match on
> > the
> > > DSCP value, but the above will work as well.
> > >
> > > -ryan
> > >
> > >
> > > The Codec are G711 and G728. How do I mark only for these codecs.
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>
>
>

-- 
Narbik Kocharians
CCSI#30832, CCIE# 12410 (R&S, SP, Security)
www.MicronicsTraining.com
Sr. Technical Instructor
YES! We take Cisco Learning Credits!
Training And Remote Racks available
Blogs and organic groups at http://www.ccie.net