When you configure the sniffer application, you specified a file name for saving all captured packets. The location of this file is relative to the directory with script for starting the NeSSi2 backend. If it is not there, it means no packets haven been collected. Either the node with the sniffer application does not receive/send any packets or you did not specify if incoming, outgoing or both packets should be collected.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
How can I collect pcap files?
I used packet sniffer application on NeSSi2 and then tried to locate pcap files. Here is the output screen:
newuser@newpc:/$ locate pcap
/usr/lib/libpcap.so.0.8
/usr/lib/libpcap.so.1.0.0
/usr/share/doc/libpcap0.8
/usr/share/doc/libpcap0.8/CREDITS.gz
/usr/share/doc/libpcap0.8/README.Debian
/usr/share/doc/libpcap0.8/README.gz
/usr/share/doc/libpcap0.8/changelog.Debian.gz
/usr/share/doc/libpcap0.8/changelog.gz
/usr/share/doc/libpcap0.8/copyright
/usr/share/man/man7/pcap-filter.7.gz
/usr/src/linux-headers-2.6.32-21/include/linux/mfd/ezx-pcap.h
/usr/src/linux-headers-2.6.32-70/include/linux/mfd/ezx-pcap.h
/var/lib/dpkg/info/libpcap0.8.list
/var/lib/dpkg/info/libpcap0.8.md5sums
/var/lib/dpkg/info/libpcap0.8.postinst
/var/lib/dpkg/info/libpcap0.8.postrm
/var/lib/dpkg/info/libpcap0.8.shlibs
/var/lib/dpkg/info/libpcap0.8.symbols
When you configure the sniffer application, you specified a file name for saving all captured packets. The location of this file is relative to the directory with script for starting the NeSSi2 backend. If it is not there, it means no packets haven been collected. Either the node with the sniffer application does not receive/send any packets or you did not specify if incoming, outgoing or both packets should be collected.