Chris Bradshaw 3/24/2026

Handling a full Azure VNET

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This article provides a practical guide for handling a full Azure VNET by extending its IP address space. It covers two methods: increasing the existing IP range (e.g., /16 to /15) and adding additional non-contiguous ranges (e.g., /24). The changes can be done live with minimal impact on running VMs. The article includes Terraform code examples for modifying address_space definitions and addresses the gotcha of resyncing VNET peerings after expansion, using Azure Portal or PowerShell commands like Sync-AzVirtualNetworkPeering. Targeted at Azure administrators and DevOps engineers.

Handling a full Azure VNET

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