@@ -1574,6 +1574,13 @@ message IPAllocationPolicy {
   // Output only. [Output only] The services IPv6 CIDR block for the cluster.
   string services_ipv6_cidr_block = 23
       [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. [Output only] The additional pod ranges that are added to the
+  // cluster. These pod ranges can be used by new node pools to allocate pod IPs
+  // automatically. Once the range is removed it will not show up in
+  // IPAllocationPolicy.
+  AdditionalPodRangesConfig additional_pod_ranges_config = 24
+      [(google.api.field_behavior) = OUTPUT_ONLY];
 }
 
 // Configuration for Binary Authorization.
@@ -2313,8 +2320,21 @@ message ClusterUpdate {
   // If a stack type is provided and does not match the current stack type of
   // the cluster, update will attempt to change the stack type to the new type.
   StackType desired_stack_type = 119;
+
+  // The additional pod ranges to be added to the cluster. These pod ranges
+  // can be used by node pools to allocate pod IPs.
+  AdditionalPodRangesConfig additional_pod_ranges_config = 120;
+
+  // The additional pod ranges that are to be removed from the cluster.
+  // The pod ranges specified here must have been specified earlier in the
+  // 'additional_pod_ranges_config' argument.
+  AdditionalPodRangesConfig removed_additional_pod_ranges_config = 121;
 }
 
+// AdditionalPodRangesConfig is the configuration for additional pod secondary
+// ranges supporting the ClusterUpdate message.
+message AdditionalPodRangesConfig {}
+
 // This operation resource represents operations that may have happened or are
 // happening on the cluster. All fields are output only.
 message Operation {