<DIV>Found a good document providing a solution for this named:</DIV>
<DIV>"VoIP QoS for Frame Relay to ATM Internetworking with LLQ, PPP LFI and cRTP"</DIV>
<DIV><STRONG><FONT size=5></FONT></STRONG> </DIV>
<DIV><A href="http://www.cisco.com/en/US/tech/tk652/tk701/technologies_configuration_example09186a0080101210.shtml">http://www.cisco.com/en/US/tech/tk652/tk701/technologies_configuration_example09186a0080101210.shtml</A></DIV>
<DIV><BR><BR><B><I>"Voll, Scott" <Scott.Voll@wesd.org></I></B> wrote:</DIV>
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<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I had the same problem. The only work around I got from TAC was “don’t use rtp header compression”…….. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Scott<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
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<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] <B><SPAN style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Yasser Aly<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Wednesday, June 08, 2005 6:38 AM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> cisco-nsp@puck.nether.net; cisco-voip@puck.nether.net<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [cisco-voip] Voice header compression Problem with IETFencapsulation</SPAN></FONT><o:p></o:p></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Hello,<o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> I am trying to apply rtp header compression on a frame-relay interface.<o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">I am using the configuration below but error popping shows that header compression is not supported with IETF encapsulation. I have to use IETF as the other end of this connection is over ATM interface so Frame-Relay to ATM internetworking is in the middle. What can be done to solve this problem? <o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Configuration Below:<o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">==============<o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">interface Serial0/0<BR> no ip address<BR> encapsulation frame-relay IETF<BR> no fair-queue<BR> frame-relay traffic-shaping<BR> frame-relay lmi-type ansi</SPAN></FONT><o:p></o:p></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">error message while adding the ip rtp header compression or fr ip rtp header compression:</SPAN></FONT><o:p></o:p></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Router(config)#interface Serial0/0<BR>Router(config-if)#ip rtp header-compression </SPAN></FONT><o:p></o:p></P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">%Interface is set for IETF encapsulation! IP header compression is supported only over CISCO encapsulation! </SPAN></FONT><o:p></o:p></P></DIV>
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<P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><BR>Router(config-if)#</SPAN></FONT><o:p></o:p></P></DIV>
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<P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Router(config-if)#frame-relay ip rtp header-compression <BR>%Interface is set for IETF encapsulation! IP header compression is supported only over CISCO encapsulation! <o:p></o:p></SPAN></FONT></P></DIV></DIV></DIV></BLOCKQUOTE>