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:
o 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).
o 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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