Below is a very light virtual machine based on Core Linux kernel 4.8 (TinyCore) 26 Mo with network tools like iperf3, tcpdump, net-bridging, iproute2, busybox (httpd), tcpreplay, nmap, openssh.
corelinux1.5.ova
basic commands/directory /etc/sysconfig/tcedir/optional => packages /etc/sysconfig/tcedir/onboot.lst => on boot package to be loaded sudo vi /opt/eth0.sh => change interfaces parameters #configure an interface pkill udhcp => stop dhcp for this interface ifconfig eth0 10.253.106.2 netmask 255.255.255.192 up route add default gw 10.