Hi everyone! I'm using Open vSwtich in a academic and scientific research context and started by doing the tutorials listed in https://docs.openvswitch.org/en/latest/tutorials/. When trying to replicate the conntrack tutorial I've hitted a few roadblocks. I've started by using an Ubuntu 22 VM with OVS, Faucet, Python and Scapy installed. The IP of my VM is on the 192.168.112.X network and I followed every step on the tutorial to setup the namespaces and the interfaces required. The first thing I noticed was, to run the sendp command on scapy I had to run the following commands to have the network up (not addressed in the tutorial):
sudo ip netns exec left sudo ip link set veth_l1 up sudo ip netns exec right sudo ip link set veth_r1 up After this, when I tried to run: sendp(Ether()/IP(src="192.168.0.2", dst="10.0.0.2")/TCP(sport=1024, dport=2048, flags=0x02, seq=100), iface="veth_l1") and I got the following warning: WARNING: No route found (no default route?) I've tried to set a default route inside the namespace using sudo ip netns exec <namespace> bash but I that didn't solve my problem. Could anyone help me with this situation, knowing how to do conntrack is a fundamental part of my project. Best Regards, André Clérigo.
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