Merge pull request kubernetes#82597 from aramase/standard-lb-ipv6

Fix ipv6 ip allocation method for standard lb

Author: k8s-ci-robot

staging/src/k8s.io/legacy-cloud-providers/azure/azure_loadbalancer.go

@@ -546,8 +546,12 @@ func (az *Cloud) ensurePublicIPExists(service *v1.Service, pipName string, domai
 		if ipv6 {
 			pip.PublicIPAddressVersion = network.IPv6
 			klog.V(2).Infof("service(%s): pip(%s) - creating as ipv6 for clusterIP:%v", serviceName, *pip.Name, service.Spec.ClusterIP)
-			// static allocation on IPv6 on Azure is not allowed
+
 			pip.PublicIPAddressPropertiesFormat.PublicIPAllocationMethod = network.Dynamic
+			if az.useStandardLoadBalancer() {
+				// standard sku must have static allocation method for ipv6
+				pip.PublicIPAddressPropertiesFormat.PublicIPAllocationMethod = network.Static
+			}
 		} else {
 			pip.PublicIPAddressVersion = network.IPv4
 			klog.V(2).Infof("service(%s): pip(%s) - creating as ipv4 for clusterIP:%v", serviceName, *pip.Name, service.Spec.ClusterIP)