ipfixprobe
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Multiple flows with same 5-tuples and times
I get multiple flows with the same 5-tuples (IPs, ports, protocol) and same times.
ipfixprobe is running as follows:
/usr/bin/ipfixprobe -i 'dpdk;p=0;q=1;e=ipfixprobe-eal --lcores (0-7)@(1,3,5,7,9,11,13,15,17,19,21,23) -a 0000:d8:00.0 --file-prefix=11263' -s 'cache;size=20;active=300;inactive=60;split' -p basicplus -p dns -p http -p tls -p quic -p passivedns -o ipfix;host=target-host;port=target-port;id=216;dir=216;
Observe the following:

The IP addresses for combinations of ports in the screenshot are the same. I'm quite certain that it is impossible to export that much traffic in a single millisecond.
Setup
OS: Ubuntu 22.04 LTS
Compilation as deb package using make deb with modified dh_auto_configure in debian/rules
Full configure params:
./configure --build=x86_64-linux-gnu --prefix=/usr --includedir=\${prefix}/include --mandir=\${prefix}/share/man --infodir=\${prefix}/share/info --sysconfdir=/etc --localstatedir=/var --disable-option-checking --disable-silent-rules --libdir=\${prefix}/lib/x86_64-linux-gnu --libexecdir=\${prefix}/lib/x86_64-linux-gnu --disable-maintainer-mode --disable-d
ependency-tracking --with-pcap --with-quic --with-msects --with-dpdk --enable-debug