Description of problem: We are looking to the ability to preserver the source IP of a pod when connecting to another pod on the SDN. At this time all traffic is masqueraded to the IP of tun0. https://github.com/openshift/origin/blob/release-3.7/pkg/network/node/iptables.go#L145-L234 We would like to be able to implement network visualization of traffic and be able to link the source IP of the request to the pod name. At this time it is not possible because the IP is that of tun0.
You can achieve this using the OpenShift networkpolicy plugin. The feature is not available with the other OpenShift network plugin.