Build DigitalOcean VPC network configurations with IP ranges and peering.
Last verified: May 2026
Build DigitalOcean VPC network configurations with IP ranges, resource placement, and peering settings.
Required Fields
nameregionip_rangeOutput will appear here...The builder accepts a VPC name, region, IP range (CIDR), and a flag indicating whether this VPC should be marked the region default. It validates the CIDR is in private space (RFC 1918), checks for overlap with DigitalOcean reserved ranges, and confirms it does not conflict with other VPCs you list as adjacent. The output is a `digitalocean_vpc` Terraform resource block plus a written summary of the address budget.
DigitalOcean VPCs provide private networking between Droplets, managed databases, Spaces, and load balancers in the same region. The DO VPC Config Builder generates a VPC definition with an IP range, region selection, and optional default-VPC override, plus validates that the proposed CIDR does not overlap with DigitalOcean's reserved ranges or with other VPCs you specify. Output is Terraform-ready and includes the routing implications you need to know.
You are setting up a second region for failover and want the new VPC's address space to not overlap with the existing primary VPC, in case you eventually peer them. The primary uses 10.10.0.0/20. You enter both into the builder; it flags that 10.10.0.0/20 also conflicts with DigitalOcean's reserved 10.10.10.0/24 — which the original VPC has been quietly working around. You allocate the new VPC at 10.40.0.0/20 (well clear of reserved space and the primary) and add a backlog item to migrate the primary off 10.10/20 when the maintenance window allows.
Pick a /20 or larger for production VPCs — anything smaller and you will be subnet-starved within a year. /16s give plenty of room but feel wasteful; /20 (4,096 addresses) is the sweet spot for most teams.
Avoid the 10.0.0.0/8 prefix if you have any AWS, Azure, or GCP presence. Conflicts at the network layer cause routing problems during multi-cloud peering. 172.16.0.0/12 is a quieter neighborhood.
10.10.10.0/24, 10.20.0.0/16, and a handful of others are reserved for DigitalOcean's internal infrastructure and management plane. Using one of these as your VPC range produces silent routing failures. The builder warns when your range overlaps a known reserved block.
VPC Peering on DigitalOcean is supported between VPCs in the same region as of the current platform; cross-region peering is on the roadmap but not currently generally available. For cross-region private traffic, options are: route via a Droplet running a VPN, use DigitalOcean's reserved IPs with explicit routing, or rearchitect the workload to use public endpoints with TLS.
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