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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Here, there are 2 interfaces but only the VIP should be used. Also, the INVITE exits the same interface it entered (i.e. the VIP) but exits with a different source port (because of the TCP connection).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>I tried disabling double RR, I only see the VIP record route now, however I still see the top Via with the non-VIP interface although the INVITE is forwarded to the proxy using the VIP interface.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:FR'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:FR'> sr-users [mailto:sr-users-bounces@lists.sip-router.org] <b>On Behalf Of </b>Alex Balashov<br><b>Sent:</b> Tuesday, May 05, 2015 3:31 PM<br><b>To:</b> Mickael Marrache; sr-users@lists.sip-router.org<br><b>Subject:</b> Re: [SR-Users] Double record routes<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal style='background:white'><span style='color:#1F497D'>That is normal behaviour if double RR is enabled in the RR module; two Record-Routes will be added if Kamailio is multihomed and the invite exits a different interface to the one it entered.<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:#1F497D'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:#1F497D'>--<br>Alex Balashov | Principal | Evariste Systems LLC<br>303 Perimeter Center North, Suite 300<br>Atlanta, GA 30346<br>United States<br><br>Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct)<br>Web: <a href="http://www.evaristesys.com/">http://www.evaristesys.com/</a>, <a href="http://www.csrpswitch.com/">http://www.csrpswitch.com/</a><br><br>Sent from my BlackBerry.<o:p></o:p></span></p></div><table class=MsoNormalTable border=0 cellpadding=0 width="100%" style='width:100.0%;background:white;border-spacing:0px'><tr><td style='padding:.75pt .75pt .75pt .75pt;font-size:initial;text-align:initial'><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From: </span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Mickael Marrache<o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Sent: </span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Tuesday, May 5, 2015 08:27<o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>To: </span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><a href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a><o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Reply To: </span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Kamailio (SER) - Users Mailing List<o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Subject: </span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>[SR-Users] Double record routes<o:p></o:p></span></p></div></div></td></tr></table><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><div id="_originalContent"><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span lang=EN-US>We are adding TCP support to our load balancer and for some reason it adds two record route headers.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>The instance have two IP addresses on which it binds: one if the VIP address and the second is the non-VIP address.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>I explicitly set the tcp_source_ipv4 parameter with the VIP address so that it is used as source address for outbound TCP connection.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>So, we get the following INVITE going from the load balancer to a proxy:</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>T 2015/05/05 12:08:49.715822 VIP:54667 -> PROXY:5060 [AP]</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>INVITE <a href="sip:123@mycompany.com">sip:123@mycompany.com</a> SIP/2.0.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Record-Route: <<a href="sip:NONVIP;transport=tcp;r2=on;lr">sip:NONVIP;transport=tcp;r2=on;lr</a>>.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Record-Route: <<a href="sip:VIP;transport=tcp;r2=on;lr">sip:VIP;transport=tcp;r2=on;lr</a>>.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Via: SIP/2.0/TCP NONVIP;branch=z9hG4bK6f4.688efa90a17e02181ef7a11fecf8bb72.0;i=3.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Via: SIP/2.0/TCP 1.1.1.1:4598;received=2.2.2.2;branch=z9hG4bKmqFaCxNo6m3f5LW4;rport=40020.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>You can see the INVITE is sent from the VIP address (as specified using the tcp_source_ipv4 parameter). However, the added Via corresponds to the non-VIP address. Also, you can see the two record route headers added for both addresses.</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Any idea?</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Thanks,</span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Mickael</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:FR'><br><br><o:p></o:p></span></p></div></div></body></html>