Public VCF as-a-Service - Setting up your network after vSphere to Public VCF as-a-Service migration

Objective

This guide explains the necessary steps to configure your environment after migrating from your managed VMware vSphere on OVHcloud services to a managed Public VCF as-a-Service solution.

These modifications are essential to ensure the proper functioning of your virtual machines and networks.

Requirements

• A Public VCF as-a-Service on OVHcloud solution.
• Being the technical administrator of the managed VMware vSphere on OVHcloud infrastructure.
• Access to the OVHcloud Control Panel

Instructions

Step 1: Update virtual machine network settings

After migration, you need to update the network configurations of your virtual machines (VMs).

To set the network configuration to DHCP (recommended):

1. Go to the network settings of each VM.

2. Change the IP assignment mode to DHCP.

3. Make sure the Guest customization settings are set to Disabled before modifying the NIC settings.

Step 2: Handling the IP addressing bug in Public VCF as-a-Service

Networks are pre-created with placeholder Gateway CIDRs, as the actual VM subnets are unknown beforehand.

This can lead to IP assignment issues if not addressed post-migration.

Identified issue

• If a static IP is manually assigned to a VM and does not match the pre-configured Gateway CIDR, the assignment will fail.
• You will not be able to create or update a VM with manual IP assignment outside the predefined Gateway CIDR.

Solutions

1. Use DHCP mode (recommended)

• Setting all IP modes to DHCP works seamlessly, even if the OS is configured with a static IP.
• This approach is valid for both isolated networks and VM Networks*.

2. Create a new network

• Customers can create a new network with the correct subnet.
• This solution works only if the customer has a single public IP range.

Go further

If you need training or technical assistance to implement our solutions, please contact your Technical Account Manager or click on this link to get a quote and ask our Professional Services experts for a custom analysis of your project.

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