Create Subnets for Servers

A subnet is a range of IP addresses in your VPC. You need to create subnets in the VPC, so that you can launch AWS resources, such as instances and gateways, in the related subnets. This topic describes how to create subnets for servers in a basic deployment architecture of Yeastar P-Series Cloud PBX.

Background information

When you create a subnet, you must specify a range of IPv4 addresses for the VPC in the form of CIDR block (for example, 10.0.0.0/24). Any AWS instances launched within the subnet will communicate over IPv4 only.

In a basic architecture deployment of Yeastar P-Series Cloud PBX, you need to create three subnets in the VPC. For different purposes, the three subnets are defined as below.

Subnet IPv4 CIDR block Description
Public Subnet 1 10.0.0.0/24

In this subnet, you will later launch instances for the following servers:

  • YCM Server
  • SBC Server
  • SBC Proxy Server
Public Subnet 2 10.0.1.0/24 In this subnet, you will later create a NAT gateway.
Private Subnet 10.0.2.0/24 In this subnet, you will later launch an instance for PBXHub Server

The following diagram shows the architecture of your VPC after you complete this step.

Procedure

  1. Log in to Amazon VPC Console.
  2. On the left navigation bar, click Subnets, then click Create subnet.

  3. In the VPC ID drop-down list, select the VPC you've created for the Cloud PBX. In this example, select ycm-cloudpbx.

    The associated IPv4 CIDRs is displayed under the VPC ID.

  4. In the Subnet settings section, complete the following settings:

    1. Set up the subnet.
      • Subnet name: Enter a name to help you identify the subnet. In this example, enter ycm-public-subnet1.
      • Availability Zone: In the drop-down list, select a desired Availability Zone or leave the default setting to let Amazon choose an Availability Zone for you.

        The subnet will be created in the selected Availability Zone.

      • IPv4 CIDR block: Specify an IPv4 CIDR block for the subnet. In this example, enter 10.0.0.0/24.
    2. Click Add new subnet to and follow the Step 4 to set up another two subnets.
  5. Click Create subnet.

    The new created subnets are listed in the Subnets list.