Amazon Elastic Compute Cloud Update: With this release, you can call ModifySubnetAttribute with two new parameters: MapCustomerOwnedIpOnLaunch and CustomerOwnedIpv4Pool, to map a customerOwnedIpv4Pool to a subnet. You will also see these two new fields in the DescribeSubnets response. If your subnet has a customerOwnedIpv4Pool mapped, your network interface will get an auto assigned customerOwnedIpv4 address when placed onto an instance.

Author: AWS

.changes/next-release/feature-AmazonElasticComputeCloud-17a9c3c.json

@@ -0,0 +1,5 @@
+{
+    "type": "feature",
+    "category": "Amazon Elastic Compute Cloud",
+    "description": "With this release, you can call ModifySubnetAttribute with two new parameters: MapCustomerOwnedIpOnLaunch and CustomerOwnedIpv4Pool, to map a customerOwnedIpv4Pool to a subnet. You will also see these two new fields in the DescribeSubnets response. If your subnet has a customerOwnedIpv4Pool mapped, your network interface will get an auto assigned customerOwnedIpv4 address when placed onto an instance."
+}

services/ec2/src/main/resources/codegen-resources/service-2.json

@@ -8917,7 +8917,7 @@
       "members":{
         "AvailabilityZone":{
           "shape":"String",
-          "documentation":"<p>The Availability Zone or Local Zone for the subnet.</p> <p>Default: AWS selects one for you. If you create more than one subnet in your VPC, we do not necessarily select a different zone for each subnet.</p> <p>To create a subnet in a Local Zone, set this value to the Local Zone ID, for example <code>us-west-2-lax-1a</code>. For information about the Regions that support Local Zones, see <a href=\"https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html#concepts-available-regions\">Available Regions</a> in the <i>Amazon Elastic Compute Cloud User Guide</i>.</p>"
+          "documentation":"<p>The Availability Zone or Local Zone for the subnet.</p> <p>Default: AWS selects one for you. If you create more than one subnet in your VPC, we do not necessarily select a different zone for each subnet.</p> <p>To create a subnet in a Local Zone, set this value to the Local Zone ID, for example <code>us-west-2-lax-1a</code>. For information about the Regions that support Local Zones, see <a href=\"https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html#concepts-available-regions\">Available Regions</a> in the <i>Amazon Elastic Compute Cloud User Guide</i>.</p> <p>To create a subnet in an Outpost, set this value to the Availability Zone for the Outpost and specify the Outpost ARN.</p>"
         },
         "AvailabilityZoneId":{
           "shape":"String",
@@ -26036,12 +26036,20 @@
         },
         "MapPublicIpOnLaunch":{
           "shape":"AttributeBooleanValue",
-          "documentation":"<p>Specify <code>true</code> to indicate that ENIs attached to instances created in the specified subnet should be assigned a public IPv4 address.</p>"
+          "documentation":"<p>Specify <code>true</code> to indicate that network interfaces attached to instances created in the specified subnet should be assigned a public IPv4 address.</p>"
         },
         "SubnetId":{
           "shape":"SubnetId",
           "documentation":"<p>The ID of the subnet.</p>",
           "locationName":"subnetId"
+        },
+        "MapCustomerOwnedIpOnLaunch":{
+          "shape":"AttributeBooleanValue",
+          "documentation":"<p>Specify <code>true</code> to indicate that network interfaces attached to instances created in the specified subnet should be assigned a customer-owned IPv4 address.</p> <p>When this value is <code>true</code>, you must specify the customer-owned IP pool using <code>CustomerOwnedIpv4Pool</code>.</p>"
+        },
+        "CustomerOwnedIpv4Pool":{
+          "shape":"CoipPoolId",
+          "documentation":"<p>The customer-owned IPv4 address pool associated with the subnet.</p> <p>You must set this value when you specify <code>true</code> for <code>MapCustomerOwnedIpOnLaunch</code>.</p>"
         }
       }
     },
@@ -33814,6 +33822,16 @@
           "documentation":"<p>Indicates whether instances launched in this subnet receive a public IPv4 address.</p>",
           "locationName":"mapPublicIpOnLaunch"
         },
+        "MapCustomerOwnedIpOnLaunch":{
+          "shape":"Boolean",
+          "documentation":"<p>Indicates whether a network interface created in this subnet (including a network interface created by <a>RunInstances</a>) receives a customer-owned IPv4 address.</p>",
+          "locationName":"mapCustomerOwnedIpOnLaunch"
+        },
+        "CustomerOwnedIpv4Pool":{
+          "shape":"CoipPoolId",
+          "documentation":"<p>The customer-owned IPv4 address pool associated with the subnet.</p>",
+          "locationName":"customerOwnedIpv4Pool"
+        },
         "State":{
           "shape":"SubnetState",
           "documentation":"<p>The current state of the subnet.</p>",