---
name: vpc-cn-limitations-known-issues
title: Known issues for cluster networks
description: Before you create a cluster network, review the following known issues.
last-updated: 2026-06-26
---

> ## Documentation Index
> The table of contents for this documentation set is at https://cloud.ibm.com/docs/vpc?format=markdown
> The index for all IBM Cloud docs is at: https://cloud.ibm.com/docs/llms.txt
> Use these files to discover more information as needed.

# Known issues for cluster networks
{: #known-issues-cluster-networks}

Before you create a cluster network, review the following known issues.
{: shortdesc}

- The new instance profiles are expected to take about 20 minutes to start.
- When you [create an instance](https://cloud.ibm.com/docs/apis/vpc/latest#create-instance) by using the API with the `cluster_network_attachments` property specified, the `instance.create` Activity Tracker event isn't generated. To avoid this issue, [create cluster network attachments](https://cloud.ibm.com/docs/apis/vpc/latest#create-cluster-network-attachment) separately.