updated labels node-role.kubernetes.io/control-plane and node-role.kubernetes.io/master.

Author: T-Lakshmi

content/en/docs/reference/labels-annotations-taints/_index.md

@@ -1114,15 +1114,15 @@ used to determine if the user has applied settings different from the kubeadm de
 
 Used on: Node
 
-Label that kubeadm applies on the control plane nodes that it manages.
+Label that kubeadm applies on the control plane nodes that it manages. If this label set, [EndpointSlice controller](/docs/concepts/services-networking/topology-aware-routing/#implementation-control-plane) ignores that node.
 
 ### node-role.kubernetes.io/control-plane {#node-role-kubernetes-io-control-plane-taint}
 
 Used on: Node
 
 Example: `node-role.kubernetes.io/control-plane:NoSchedule`
 
-Taint that kubeadm applies on control plane nodes to allow only critical workloads to schedule on them.
+Taint that kubeadm applies on control plane nodes to allow only critical workloads to schedule on them. If this taint set, EndpointSlice controller ignores that node.
 
 ### node-role.kubernetes.io/master (deprecated) {#node-role-kubernetes-io-master-taint}
 
@@ -1133,3 +1133,6 @@ Example: `node-role.kubernetes.io/master:NoSchedule`
 Taint that kubeadm previously applied on control plane nodes to allow only critical workloads to schedule on them.
 Replaced by [`node-role.kubernetes.io/control-plane`](#node-role-kubernetes-io-control-plane-taint); kubeadm
 no longer sets or uses this deprecated taint.
+{{< note >}}
+The EndpointSlice controller ignores nodes with the `node-role.kubernetes.io/control-plane` or `node-role.kubernetes.io/master` label set.
+{{< /note >}}