Planning IP Addresses for AWS VPCs and VMware SDDCs

Planning IP Addresses for AWS VPCs and VMware SDDCs

Before deploying your VMware Cloud on AWS SDDC, you must plan two separate blocks of IP address spaces:

  1. SDDC management CIDR block
  2. VPC CIDR block

When planning IP addresses for Amazon Web Services (AWS) Virtual Private Clouds (VPCs) and VMware Software-Defined Data Centers (SDDCs), there are a few key things to consider:

  1. IP address ranges: AWS VPCs have a default IP address range of, but you can specify a different range when creating a VPC. Make sure to choose non-overlapping IP address ranges for different VPCs and SDDCs to avoid conflicts.

  2. Subnetting: Utilize subnetting to divide the IP address range into smaller subnets, and assign each subnet to a different availability zone or cluster.

  3. CIDR notation: Use Classless Inter-Domain Routing (CIDR) notation to specify IP address ranges and subnets.

  4. Network address translation (NAT): Consider using NAT to enable instances in a private subnet to communicate with the internet, while still maintaining their private IP addresses.

  5. DHCP options: Configure DHCP options to automatically assign IP addresses and other network settings to instances when they launch.

  6. Reserved IP addresses Reserve a small number of IP addresses for use by specific instances or for future expansion.


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