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trying to understand what you are saying... you have nodeA Interface: eth0 Interface: lo nodeB Interface: eth0 Interface: lo and you want the 2 to communicate over Interface: lo ??

Yup that's pretty much what it is. Slightly more complicated with another interface. nodeA Interface: eth0 Interface: eth1 Interface: lo nodeB Interface: eth0 Interface: eth1 Interface: lo eth0 + eth1 are redundant and the loopbacks are routable between each node. Basically, I want RKE2 to use the

lo

IPs as the source and destination for network traffic between nodes. It's correctly sending traffic to the loopback IP of the other node but the source address is a loopback. I'm wondering if it's possible to tell RKE2 to use the loopback as the source IP.