if badCIDRs(clusterCIDRs, badFamily) {
			errors = append(errors, fmt.Errorf("cluster is %s but clusterCIDRs contains only IPv%s addresses", clusterType, badFamily))
			if s.Config.DetectLocalMode == kubeproxyconfig.LocalModeClusterCIDR && !dualStackSupported {
				// This has always been a fatal error
				fatal = true
			}
		}
	}

	if badCIDRs(s.podCIDRs, badFamily) {