# Modifying a subnet group
<a name="SubnetGroups.Modifying"></a>

You can modify a subnet group's description, or modify the list of subnet IDs associated with the subnet group. You cannot delete a subnet ID from a subnet group if a cache is currently using that subnet.

The following procedures show you how to modify a subnet group.

## Modifying subnet groups (Console)
<a name="SubnetGroups.Modifying.CON"></a>

**To modify a subnet group**

1. Sign in to the AWS Management Console and open the ElastiCache console at [ https://console.aws.amazon.com/elasticache/](https://console.aws.amazon.com/elasticache/).

1. In the navigation pane, choose **Subnet groups**.

1. In the list of subnet groups, select the radio button of the one you want to modify and choose **Modify**.

1. In the **Selected subnets** panel, choose **Manage**.

1. Make any changes to the selected subnets and click **Choose**.

1. Click **Save changes** to save your changes.

## Modifying subnet groups (AWS CLI)
<a name="SubnetGroups.Modifying.CLI"></a>

At a command prompt, use the command `modify-cache-subnet-group` to modify a subnet group.

For Linux, macOS, or Unix:

```
aws elasticache modify-cache-subnet-group \
    --cache-subnet-group-name mysubnetgroup \
    --cache-subnet-group-description "New description" \
    --subnet-ids "subnet-42df9c3a" "subnet-48fc21a9"
```

For Windows:

```
aws elasticache modify-cache-subnet-group ^
    --cache-subnet-group-name mysubnetgroup ^
    --cache-subnet-group-description "New description" ^
    --subnet-ids "subnet-42df9c3a" "subnet-48fc21a9"
```

This command should produce output similar to the following:

```
{
    "CacheSubnetGroup": {
        "VpcId": "vpc-73cd3c17", 
        "CacheSubnetGroupDescription": "New description", 
        "Subnets": [
            {
                "SubnetIdentifier": "subnet-42dcf93a", 
                "SubnetAvailabilityZone": {
                    "Name": "us-west-2a"
                }
            },
            {
                "SubnetIdentifier": "subnet-48fc12a9", 
                "SubnetAvailabilityZone": {
                    "Name": "us-west-2a"
                }
            }
        ], 
        "CacheSubnetGroupName": "mysubnetgroup"
    }
}
```

For more information, see the AWS CLI topic [modify-cache-subnet-group](https://docs.aws.amazon.com/cli/latest/reference/elasticache/modify-cache-subnet-group.html).