Network Engineering team was modernizing its networking stack, switching from a traditional layer-two network to a layer-three spine-and-leaf network. "It mapped beautifully with what we wanted to do with Kubernetes," says Lynch. "It gives us the ability to have our servers communicate directly with the top-of-rack switches. We use Calico for <a href="https://github.com/containernetworking/cni">CNI networking for Kubernetes</a>, so we can announce all these individual Kubernetes pod IP addresses and have th