Quote from moshe on 23/10/2020, 9:37 pm

Install basic networking for kubernetes for cluster

kubeadm init –pod-network-cidr=10.244.0.0/16

sudo kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

 

Reference 

https://kubernetes.io/docs/concepts/cluster-administration/networking/#how-to-implement-the-kubernetes-networking-model

https://docs.projectcalico.org/getting-started/kubernetes/self-managed-onprem/onpremises