On Wed, Jan 25, 2012 at 3:52 AM, Fabian Borot <fbo...@hotmail.com> wrote:
> Hi
> I am using sipp on a machine with these IPs:
>
> eth0 172.31.196.241
> eth1 10.10.10.1
> lo 127.0.0.1
>
> when using sipp to send media, the RTP packets are sent from 127.0.0.1 to
> 127.0.0.1 [local loopback to local loopback]
>
> this is the command I am using:
>
> ./sipp 172.31.196.242 -sn uac_pcap -i 172.31.196.241 -mi
> 172.31.196.241 -d 5000 -l 1 -m 1
>
> the UAS is 172.31.196.242 and the signaling looks fine, however the UAS
> never receives the RTP because stays local (127.0.0.1 -> 127.0.0.1)
>
If I am not mistaken I never used option -mi with uac scenarios using
pcap_play.
Also, when I dump the embedded uac_pcap scenario, I see this:
<send retrans="500">
<![CDATA[
INVITE sip:[service]@[remote_ip]:[remote_port] SIP/2.0
Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch]
From: sipp <sip:sipp@
[local_ip]:[local_port]>;tag=[pid]SIPpTag09[call_number]
To: sut <sip:[service]@[remote_ip]:[remote_port]>
Call-ID: [call_id]
CSeq: 1 INVITE
Contact: sip:sipp@[local_ip]:[local_port]
Max-Forwards: 70
Subject: Performance Test
Content-Type: application/sdp
Content-Length: [len]
v=0
o=user1 53655765 2353687637 IN IP[local_ip_type] [local_ip]
s=-
c=IN IP[local_ip_type] [local_ip]
t=0 0
m=audio [auto_media_port] RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-11,16
]]>
</send>
So media_ip is not referenced in the SDP and SIPp would use local_ip.
Have you tried not passing option -mi? Maybe there is a bug that causes it
to use 127.0.0.1 if -mi is passed.
Also, maybe the sipp version you are using is buggy.
>
> After looking for information on similar issues I found a couple of post
> that say that the "mi" parameter works only on the UAS side with the rtp
> echo feature. Also the documentation says this:
>
> [media_ip] - Depending on the value of -mi parameter, it is the local IP
> address for RTP echo.
>
> RTP echo
> The "RTP echo" feature allows SIPp to listen to one or two local IP
> address and port (specified using -mi and -mp command line parameters) for
> RTP media. Everything that is received on this address/port is echoed back
> to the sender.
>
> How can I specify what interface/ip to use for sending RTP?
>
>
If i needed to use a different IP for SIP and RTP (which is not the problem
you are trying to solve), i would dump the uac_pcap scenario
sipp -sd uac_pcap > uac_pcap.xml
and edit it replacing
c=IN IP[local_ip_type] [local_ip]
with
c=IN IP[media_ip_type] [media_ip]
and see what happens when using it as
sipp -sf uac_pcap.xml -mi my_rtp_ip ... etc ...
regards,
Takeshi
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