---
title: "Setting up Zerto multi-site replication on OVHcloud Managed vSphere"
description: "The purpose of this guide is to provide step-by-step instructions to connect multiple on-premises Zerto deployments to a Managed vSphere instance. By following"
url: https://docs.us.ovhcloud.com/en/hosted-private-cloud/vmware/zerto-multi-site
lang: en
---
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# Setting up Zerto multi-site replication on OVHcloud Managed vSphere

The purpose of this guide is to provide step-by-step instructions to connect multiple on-premises Zerto deployments to a Managed vSphere instance. By following this guide, users will be able to establish secure multi-site replication, ensure disaster recovery readiness, and manage data protection across different sites.

 

## Requirements

- **Managed vSphere Setup:** A Managed vSphere environment with [Zerto deployed](https://docs.us.ovhcloud.com/en/hosted-private-cloud/vmware/zerto-virtual-replication-vsphere-drp.md)
- **On-Premises Zerto:** [Zerto](https://us.ovhcloud.com/hosted-private-cloud/vmware/zerto/) installed and configured on your local infrastructure.
- **VPN Information:** All necessary VPN credentials, IP addresses, and keys for both on-premises and Managed vSphere environments

**Note:**

Appropriate access to Zerto Manager on both Managed vSphere and on-premises sites.

 

## Network Diagram

The following diagram illustrates the connectivity setup for multi-site Zerto replication between the customer site and Managed vSphere:

Diagram Explanation:

- **OPNSense Public IP**: The public IP of the customer firewall/router.
- **OPNSense Private IP**: The internal IP address of the customer firewall.
- **ZVM Private IP**: The internal IP of the customer Zerto Virtual Manager.
- **Internal ZVM Network**: The LAN connecting customer ZVM and vRAs.
- **OVHcloud Public IP**: The public-facing IP for the Managed vSphere.
- **OVHcloud ZVM Network /23**: The private network within the hosted Managed vSphere.
- **ZVM Private IP (Managed vSphere)**: The private IP addresses of Zerto VMs (ZVM and vRAs) hosted in Managed vSphere.

This setup ensures secure VPN connectivity between on-premises Zerto and OVHcloud Managed vSphere, allowing multi-site replication and disaster recovery.

 

## Instructions

### Access Zerto Manager on Managed vSphere

From the [OVHcloud Control Panel](http://manager.us.ovhcloud.com/), navigate to your infrastructure via the `Hosted Private Cloud` and `Managed VMware vSphere` menus.

Select your PCC (e.g., `pcc-123-45-67-890`) and datacenter (e.g., `datacenter12345`), then choose the `Zerto` tab.

 

### Configure VPN and On-Premise Zerto Details

Click the `Add a site` button, enter your VPN information (IP address and encryption key), and enter the details of your on-premises Zerto deployment. Refer to our example screenshot for guidance:

### Start VPN configuration

Submit your information. The Managed vSphere will automatically start the VPN setup, allowing secure access to your on-premises Zerto site.

 

### Let automated processes run

Managed vSphere will run automated tasks to configure multi-site connectivity.

Wait until the status shows `Configuration deployed`.

 

### Connect the VPN

Connect your on-premises VPN to the Managed vSphere’s Zerto VPN and verify that the connection is active.

 

### Pair the Zerto sites

Log in to the PCC Zerto, select the `Sites` section, and retrieve the token by choosing your site and clicking the `🔑 Generate Pairing Token` button.

Log in to the on-premise Zerto, select `Pair to a site with a license`, and enter the pairing token you retrieved in the previous step.

Once paired, your multi-site replication setup is complete.

 

## Troubleshooting Tips

- **VPN issues**: Check credentials, firewall, and network settings.
- **Token/site pairing**: Verify the token, ZVM IP, and Zerto license.

 

## Security Considerations

- Use strong encryption for all VPN connections.
- Ensure secure authentication methods are in place.
- Limit access to Zerto and Managed vSphere management interfaces.
- Regularly review logs and monitor for suspicious activity.
- Keep Zerto and Managed vSphere software up to date with security patches.

 

## Go further

Browse all the [VMware on OVHcloud guides](https://docs.us.ovhcloud.com/en/hosted-private-cloud/vmware/landing-page-vmware.md).

Browse the rest of the [OVHcloud US documentation](https://docs.us.ovhcloud.com/en/index.md) for guides on our other products and services.

Learn more about [VMware on OVHcloud](https://us.ovhcloud.com/hosted-private-cloud/vmware/) on the OVHcloud US website.

If you need training or technical assistance to implement our solutions, contact your sales representative or click on [this link](https://us.ovhcloud.com/professional-services/) to get a quote and ask our Professional Services experts for a custom analysis of your project.