# Overprovisioned Azure Virtual WAN Hub Capacity

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# Overprovisioned Azure Virtual WAN Hub Capacity

## Explanation

This inefficiency occurs when an Azure Virtual WAN hub is provisioned with more capacity than required to support real network traffic. Because hub costs scale with the number of configured scale units, overprovisioned hubs continue to incur higher charges even when traffic levels remain consistently low. This commonly happens when hubs are sized for peak or anticipated demand that never materializes, or when traffic patterns change over time without corresponding capacity adjustments.

## Relevant Billing Model

Azure Virtual WAN hubs are billed based on the number of hub scale units provisioned. Charges are driven by configured capacity rather than actual traffic volume.

## Detection

- Review whether hub traffic levels remain consistently low relative to the configured capacity

- Identify Virtual WAN hubs sized for historical or projected peaks that are no longer relevant

- Assess whether capacity decisions were made conservatively without periodic re-evaluation

## Remediation

- Reduce hub capacity to better align with observed traffic patterns

- Periodically reassess Virtual WAN hub sizing as network usage evolves

- Incorporate capacity reviews into regular network cost and architecture assessments

## Relevant Documentation

- [https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about](https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-about)

- [https://learn.microsoft.com/en-us/azure/virtual-wan/pricing](https://learn.microsoft.com/en-us/azure/virtual-wan/pricing)

[Submit Feedback](https://hub.pointfive.co/inefficiencies/overprovisioned-azure-virtual-wan-hub-capacity-a123)

## At a glance

Reference

CER-0300

Cloud provider

Azure

Service

Azure Virtual WAN

Category

[Networking](https://www.pointfive.co/efficiency-hub/service-category/networking)

Inefficiency type

Overprovisioned network capacity

## Contributed by

- Aaran Bhambra 

### Aaran Bhambra

FinOps Engineer / DevOps Engineer @ WTW

[LinkedIn](https://www.linkedin.com/in/aaran-bhambra/)

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