Custom VPC and CIDR Block
Learn to create a custom VPC and configure IP addresses for subnets to meet the needs of an organization.
A VPC is crucial to deploying and managing resources securely within AWS Regions. We can have a maximum of five VPCs in an AWS Region, including a default one.
Planning IP range for the VPC
Let’s consider an organization with offices worldwide. For now, we are planning connectivity for only one AWS Region, us-east-1. To create our own VPC, we need to take care of the following:
IP addresses range for the VPC
Number of availability zones to span the VPC
Private and public subnets and their IP ranges
When we create a VPC we need to define the CIDR block for our VPC. From the networking point of view, all the resources we create in a VPC must take IP addresses from this CIDR block. Below are a few important points to consider when defining the CIDR block:
A maximum of five CIDR blocks are allowed per VPC ...