The PMK cluster by default does not have the
podCIDR information in the Node Spec. We encountered a case where the Citrix ingress controller is configured on a PMK cluster and it need to access the
podCIDR information. The citrix ingress controller which runs in a pod inside the Kubernetes cluster configures a physical Netscaler Load Balancer for Kubernetes. One of the ingress controller features is the ability to automatically update static routes on the Netscaler which are needed to reach the pods inside the cluster, but in the PMK cluster it is unable to do so because the
podCIDR is missing from the node spec and the routes have to be updated manually on the Loadbalancer.
source - https://developer-docs.citrix.com/projects/citrix-k8s-ingress-controller/en/latest/network/staticrouting/