RE: ip rtp header-compression

From: wilfred d'souza (wilfred_thegr8@yahoo.co.in)
Date: Sun Nov 18 2007 - 10:25:26 ART


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
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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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