[SR-Users] Questions on multihomed setup

4 Apr 2012

Hi all!

I try to setup an kamailio 3.2.2 that is multihomed (mhomed=1) with
public and private ip addresses.
It should *always* use rtpproxy for all rtp traffic.

In wireshark i see that an ACK is missing, the log shows me an error
in rr module:
rr [loose.c:103]: failed to parse Route HF

So my questions are:
1.) Is my NATMANAGE route logic correct?
2.) Why is the ACK dropped by kamailio (ends without transactions)?
3.) Should the SDP/contact field to the 3rd party sipserver have the
public ip???
Now it becomes the private IVR ip address.

Thanks!
Cheers Karsten

##########################################
Kamailio public ip 222.222.222.222
Kamailio private ip 172.20.100.74
##########################################

# RTPProxy control
route[NATMANAGE] {
#!ifdef WITH_NAT
        xlog("NATMANAGE M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
        if (is_request()) {
                if(has_totag()) {
                        if(check_route_param("nat=yes")) {
                                setbflag(FLB_NATB);
                        }
                }
        }

        if (isbflagset(FLB_NATB))
                return;

        if (dst_ip == 222.222.222.222) {
                xlog("rtpproxy_manage ext to int\n");
                rtpproxy_manage("FAEI","172.20.10.74");
                } else {
                xlog("rtpproxy_manage int to ext\n");
                rtpproxy_manage("FAIE","222.222.222.222");
        }

        if (is_request()) {
                if (!has_totag()) {
                        add_rr_param(";nat=yes");
                }
        }
        if (is_reply()) {
                if(isbflagset(FLB_NATB)) {
                        fix_nated_contact();
                }
        }
#!endif
        return;
}

##########################################
Kamailio public ip 222.222.222.222
Kamailio private ip 172.20.100.74
IVR ip 172.20.100.61
##########################################

U 2012/04/04 14:05:59.918472 217.10.79.9:5060 -> 222.222.222.222:5060
INVITE sip:kalkbrenner@222.222.222.222:5060 SIP/2.0.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;received=217.10.68.226;branch=z9hG4bK703f9495.
Via: SIP/2.0/UDP
217.10.67.13:5060;received=217.10.67.13;branch=z9hG4bK703f9495;rport=5060.
Max-Forwards: 67.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>.
Contact: <sip:alice@217.10.67.13>.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 428.
.
v=0.
o=root 1567926566 1567926566 IN IP4 217.10.67.13.
s=sipgate VoIP GW.
c=IN IP4 217.10.67.13.
t=0 0.
m=audio 17430 RTP/AVP 8 0 3 97 18 112 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:3 GSM/8000.
a=rtpmap:97 iLBC/8000.
a=fmtp:97 mode=30.
a=rtpmap:18 G729/8000.
a=fmtp:18 annexb=no.
a=rtpmap:112 G726-32/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=silenceSupp:off - - - -.
a=ptime:20.
a=sendrecv.

U 2012/04/04 14:05:59.919629 222.222.222.222:5060 -> 217.10.79.9:5060
SIP/2.0 100 trying -- your call is important to us.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;received=217.10.68.226;branch=z9hG4bK703f9495.
Via: SIP/2.0/UDP
217.10.67.13:5060;received=217.10.67.13;branch=z9hG4bK703f9495;rport=5060.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Server: Kamailio.
Content-Length: 0.
Warning: 392 222.222.222.222:5060 "Noisy feedback tells:  pid=12262
req_src_ip=217.10.79.9 req_src_port=5060
in_uri=sip:kalkbrenner@222.222.222.222:5060
out_uri=sip:kalkbrenner@172.20.100.61 via_cnt==4".
.

U 2012/04/04 14:05:59.921070 172.20.100.74:5060 -> 172.20.100.61:5060
INVITE sip:kalkbrenner@172.20.100.61 SIP/2.0.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Via: SIP/2.0/UDP 172.20.100.74;branch=z9hG4bK6021.34ce1643.0.
Via: SIP/2.0/UDP 217.10.79.9:5060;rport=5060;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;received=217.10.68.226;branch=z9hG4bK703f9495.
Via: SIP/2.0/UDP
217.10.67.13:5060;received=217.10.67.13;branch=z9hG4bK703f9495;rport=5060.
Max-Forwards: 66.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>.
Contact: <sip:alice@217.10.67.13>.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 448.
.
v=0.
o=root 1567926566 1567926566 IN IP4 222.222.222.222.
s=sipgate VoIP GW.
c=IN IP4 222.222.222.222.
t=0 0.
m=audio 47798 RTP/AVP 8 0 3 97 18 112 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:3 GSM/8000.
a=rtpmap:97 iLBC/8000.
a=fmtp:97 mode=30.
a=rtpmap:18 G729/8000.
a=fmtp:18 annexb=no.
a=rtpmap:112 G726-32/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101

U 2012/04/04 14:05:59.925396 172.20.100.61:5060 -> 172.20.100.74:5060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 172.20.100.74;branch=z9hG4bK6021.34ce1643.0.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 0.
.

U 2012/04/04 14:05:59.966415 172.20.100.61:5060 -> 172.20.100.74:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 172.20.100.74;branch=z9hG4bK6021.34ce1643.0.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 218.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 172.20.100.61.
s=-.
c=IN IP4 172.20.100.71.
t=0 0.
m=audio 19512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.

U 2012/04/04 14:05:59.966775 222.222.222.222:5060 -> 217.10.79.9:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 236.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 222.222.222.222.
s=-.
c=IN IP4 222.222.222.222.
t=0 0.
m=audio 52564 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=nortpproxy:yes.

U 2012/04/04 14:06:00.009715 217.10.79.9:5060 -> 222.222.222.222:5060
ACK sip:222.222.222.222:5060 SIP/2.0.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.3.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.3.
Via: SIP/2.0/UDP 217.10.79.9:5060;received=217.10.68.226;branch=z9hG4bK55e1bf7a.
Via: SIP/2.0/UDP
217.10.67.13:5060;received=217.10.67.13;branch=z9hG4bK55e1bf7a;rport=5060.
Route:
<sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>,<sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Max-Forwards: 67.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Contact: <sip:alice@217.10.67.13>.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 ACK.
Content-Length: 0.
X-hint: rr-enforced.
.

U 2012/04/04 14:06:00.467283 172.20.100.61:5060 -> 172.20.100.74:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 172.20.100.74;branch=z9hG4bK6021.34ce1643.0.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 218.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 172.20.100.61.
s=-.
c=IN IP4 172.20.100.71.
t=0 0.
m=audio 19512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.

U 2012/04/04 14:06:00.467915 222.222.222.222:5060 -> 217.10.79.9:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 236.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 222.222.222.222.
s=-.
c=IN IP4 222.222.222.222.
t=0 0.
m=audio 52564 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=nortpproxy:yes.

U 2012/04/04 14:06:01.468092 172.20.100.61:5060 -> 172.20.100.74:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 172.20.100.74;branch=z9hG4bK6021.34ce1643.0.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 218.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 172.20.100.61.
s=-.
c=IN IP4 172.20.100.71.
t=0 0.
m=audio 19512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.

U 2012/04/04 14:06:01.469460 222.222.222.222:5060 -> 217.10.79.9:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 236.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 222.222.222.222.
s=-.
c=IN IP4 222.222.222.222.
t=0 0.
m=audio 52564 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=nortpproxy:yes.

U 2012/04/04 14:06:03.468631 172.20.100.61:5060 -> 172.20.100.74:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 172.20.100.74;branch=z9hG4bK6021.34ce1643.0.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 218.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 172.20.100.61.
s=-.
c=IN IP4 172.20.100.71.
t=0 0.
m=audio 19512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.

U 2012/04/04 14:06:03.472282 222.222.222.222:5060 -> 217.10.79.9:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 236.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 222.222.222.222.
s=-.
c=IN IP4 222.222.222.222.
t=0 0.
m=audio 52564 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=nortpproxy:yes.

U 2012/04/04 14:06:07.469772 172.20.100.61:5060 -> 172.20.100.74:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 172.20.100.74;branch=z9hG4bK6021.34ce1643.0.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 218.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 172.20.100.61.
s=-.
c=IN IP4 172.20.100.71.
t=0 0.
m=audio 19512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.

U 2012/04/04 14:06:07.470020 172.20.100.74:5060 -> 217.10.79.9:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 218.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 172.20.100.61.
s=-.
c=IN IP4 172.20.100.71.
t=0 0.
m=audio 19512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.

U 2012/04/04 14:06:11.470798 172.20.100.61:5060 -> 172.20.100.74:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 172.20.100.74;branch=z9hG4bK6021.34ce1643.0.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 218.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 172.20.100.61.
s=-.
c=IN IP4 172.20.100.71.
t=0 0.
m=audio 19512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.

U 2012/04/04 14:06:11.471041 172.20.100.74:5060 -> 217.10.79.9:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 218.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 172.20.100.61.
s=-.
c=IN IP4 172.20.100.71.
t=0 0.
m=audio 19512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.

U 2012/04/04 14:06:13.282635 217.247.216.82:12780 -> 222.222.222.222:5060
.
.
..............

U 2012/04/04 14:06:15.468037 172.20.100.61:5060 -> 172.20.100.74:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 172.20.100.74;branch=z9hG4bK6021.34ce1643.0.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd3aff-40a69134.
Call-ID: 2d9296f200e0212711db47c036e68917(a)sipgate.de.
CSeq: 102 INVITE.
Content-Length: 218.
Content-Type: application/sdp.
Record-Route: <sip:172.20.100.74;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:222.222.222.222;r2=on;lr=on;ftag=as0ebb1d67;nat=yes>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Record-Route: <sip:172.20.40.2;lr=on>.
Record-Route: <sip:217.10.79.9;lr;ftag=as0ebb1d67>.
Supported: replaces.
Supported: 100rel.
Allow: INVITE.
Allow: ACK.
Allow: BYE.
Allow: CANCEL.
Allow: OPTIONS.
Allow: NOTIFY.
Allow: REFER.
Allow: PRACK.
Allow: INFO.
Allow: UPDATE.
Allow: MESSAGE.
Contact: <sip:172.20.100.61>.
.
v=0.
o=aculab-0204CC01 1431055130 1431055130 IN IP4 172.20.100.61.
s=-.
c=IN IP4 172.20.100.71.
t=0 0.
m=audio 19512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.

U 2012/04/04 14:06:15.468272 172.20.100.74:5060 -> 217.10.79.9:5060
SIP/2.0 200 Ok.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK6021.0ca5d221.1;rport=5060.
Via: SIP/2.0/UDP 172.20.40.2;branch=z9hG4bK6021.0ca5d221.1.
Via: SIP/2.0/UDP 217.10.79.9:5060;branch=z9hG4bK703f9495;received=217.10.68.226.
Via: SIP/2.0/UDP
217.10.67.13:5060;rport=5060;branch=z9hG4bK703f9495;received=217.10.67.13.
From: "alice" <sip:alice@sipgate.de>;tag=as0ebb1d67.
To: <sip:bob@sipgate.de>;tag=ds-46dd

-- 
Mit freundlichen Grüßen
*Karsten Horsmann*

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[SR-Users] Questions on multihomed setup