Your VPC can have one or more subnets, a subset of IP addresses within your VPC, that enable you to
group your resources based on your security and operation needs. A cluster subnet group allows you to
specify a set of subnets in your VPC.When provisioning a cluster you provide the subnet group and
Amazon Redshift creates the cluster on one of the subnets in the group.
For more information about creating a VPC, go to Amazon Virtual Private Cloud (VPC) Documentation.
After creating a subnet group, you can remove subnets you previously added or add more subnets.
Amazon Redshift provides APIs for you to create, modify or delete a cluster subnet group.You can also
perform these operations in the console.
Managing Cluster Subnet Groups Using the Console
Topics
• Creating a Cluster Subnet Group (p. 26)
• Modifying a Cluster Subnet Group (p. 27)
• Deleting a Cluster Subnet Group (p. 28)
The section explains how to manage your cluster subnet groups using the Amazon Redshift console.
You can create a cluster subnet group, manage an existing one, or delete one. All of these tasks start
from the cluster subnet group list.You must select a cluster subnet group to manage it.
In the example cluster subnet group list below, there is one cluster subnet group. By default, there are
not cluster subnet groups defined for your AWS account. Because my-subnet-group is selected
(highlighted), you can edit or delete it.The details of the selected security group are shown under Cluster
Subnet Group Details.
Creating a Cluster Subnet Group
You must have at least one cluster subnet group defined to provision a cluster in a VPC.
To create a cluster subnet group
1. Sign into the AWS Management Console and open the Amazon Redshift console at
https://console.aws.amazon.com/redshift.
2. In the navigation pane, click Subnet Groups.
3. Click Create Cluster Subnet Group.
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Amazon Redshift Management Guide
Cluster Subnet Groups
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