Hi,
Thanks for replying.
I've just figured out what the problem was.
I was indeed expecting to capture on the loopback interface, but I found out
that there were routes configured on the machine that made the RTP traffic exit
through another gateway :S
Thanks again for the help.
Best Regards,
Pedro Oliveira Silva.
From: Šindelka Pavel [mailto:sinde...@ttc.cz]
Sent: 16 de janeiro de 2018 16:41
To: sipp-users@lists.sourceforge.net
Subject: Re: [Sipp-users] SIPp audio local
is there a possibility to capture the RTP stream while the client and server
are on the same IP?
That's not really a SIPp question, but nevertheless:
* first, make sure the two instances off SIPp use different port ranges for
the RTP.
* next:
* if you run SIPp on linux, you can run one instance of tcpdump with -i
eth0 or what your network interface name is to capture the communication with
the external machine, and another instance of tcpdump with -i lo to capture the
RTP running between the two SIPp instances. Or you can install Wireshark and
run a single instance of dumpcap or tshark with several -i options (or choose
several interfaces if running a GUI Wireshark).
* if you run SIPp on Windows, you may have tough time. Normally, there
is no visible "lo" interface in Windows, but you can install npcap and during
the installation choose the option to create the lo. However, I am not sure how
Wireshark will behave if you have WinPcap and npcap installed simultaneously,
and SIPp needs WinPcap to replay pcap files which contain RTP packets. I
haven't tried yet whether npcap installed in WinPcap-compatible mode can
substitute WinPcap in this role.
Pavel
Dne 15.1.2018 v 14:49 Pedro Oliveira Silva napsal(a):
Hello,
I have a problem that I was wondering if you could help me with.
I have a SIPp scenario with one SIPp in client mode sending SIP to an
Application Server that then sends to another SIPp in server mode. Client and
Server SIPp are on the same machine while the Application Server is on another
machine.
Besides SIP I'm also sending an RTP stream so that I can also test the audio.
The problem is that since the Client and Server are on the same machine I
haven't been able to capture the RTP stream. If I put either the client or the
server on another machine I can correctly capture the RTP stream.
To send the RTP stream I'm using "<exec rtp_stream="test.raw,-1"/>" and to
capture the traffic I'm using tshark.
Has any of you ever tried this or is there a possibility to capture the RTP
stream while the client and server are on the same IP?
Thanks in advance.
Best Regards,
Pedro Oliveira Silva.
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