From: shiran guez (shiranp3@gmail.com)
Date: Sat Nov 24 2007 - 18:20:49 ART
on H323 you have also:
H323/H225 RAS GK Discovery TCP 1718
T.120 TCP 1503
On Nov 24, 2007 9:58 PM, Tarun Pahuja <pahujat@gmail.com> wrote:
> Wilfreb,
> Voice packets travels in rtp packets which are then
> encapsulated
> into UDP. The port numbers used in Cisco's implementation of voip are from
> UDP 16384 - 32767.
>
> VoIP calls can be established using H.323, SIP, MGCP or Skinny
> (Proprietary
> Protocol used by Cisco Call Manager). The port numbers used for signalling
> are listed below:
>
> H.323/H.225 = TCP 1720
>
> H.323/H.245 = TCP 11xxx (Standard Connect)
>
> H.323/H.245 = TCP 1720 (Fast Connect)
>
> H.323/H.225 RAS = TCP 1719
>
> Skinny = TCP 2000-2002 (CM Encore)
>
> ICCP = TCP 8001-8002 (CM Encore)
>
> MGCP = UDP 2427, TCP 2428 (CM Encore)
>
> SIP= UDP 5060, TCP 5060 (configurable)
>
> You can use these values to prioritize media and or signalling.
>
> HTH,
>
> Tarun
>
>
>
> On 11/18/07, wilfred d'souza <wilfred_thegr8@yahoo.co.in> wrote:
> >
> > Hello,
> >
> > Can smeone please let me know how can we use ip rtp to diffrentiate
> > between Signalling and media... Also I need to mark the traffic with
> proper
> > bandwidth..
> >
> > How can i do that?
> >
> > Appreciate your response
> >
> > Thanks,
> > Wilfred
> >
> > Avner Izhar <aizhar@ccbootcamp.com> wrote: Hi,
> >
> > Iv you enable the 'ip udp checksum' command under the voip dial-peer,
> rtp
> > will contain crc info and the cRTP will have to send this field as well
> > (since it changes from packet to packet).
> >
> > cRTP on it's own has to sense and adjust to the rtp stream, as per rfc
> > 2508, if the original packet has crc values other then 0 (zero), then
> the
> > crc has to be copied in to the compressed header.
> >
> > HTH,
> >
> > -------------------------------------------
> > thanks,
> > Avner Izhar
> > CCIE#15999 (Voice), CCVP, CCSI# 31623
> > Technical Instructor
> > CCBOOTCAMP - A Cisco Sponsored Organization (SO)
> > Email: aizhar@ccbootcamp.com
> > Toll Free: 877-654-2243
> > Direct: +1-702-968-5100 = Outside the USA
> > FAX: +1-702-446-8012
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> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > CCIE
> > Sent: Sunday, November 18, 2007 15:42
> > To: ccielab@groupstudy.com
> > Subject: ip rtp header-compression
> > Importance: Low
> >
> > pWhenever I try cRTP, throught the command
> >
> > ip rtp header-compression
> >
> > I can't find the option to preserve the UDP header checksum or not?
> >
> > Could anyone clarify if this by default would preserve the UDP header
> > checksum or not, and how I could manipulate preserving the UDP.
> >
> > Regards,
> >
> > Amin
> >
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> >
> >
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-- Shiran Guez MCSE CCNP NCE1 http://cciep3.blogspot.com http://www.linkedin.com/in/cciep3
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