Storm season is back, bringing with it the potential for significant weather events. If you have clients in areas prone to infrastructure disruption, visit the Disaster Recovery Resources guide for preparedness information. Datto recommends performing proactive disaster recovery testing to mitigate potential downtime. See our articles about the importance of disaster recovery testing and Preparing For A Cloud Virtualization Test: Policies, Procedures, And Partner Responsibilities to learn more. For live updates, follow @datto on Twitter.

Cloud VLAN Overview

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This article explains how offsite VLANs are created and goes over some limitations and best practices associated with them. 

Environment

  • Datto ALTO
  • Datto SIRIS

Description

VLAN Creation

VLANs can only be created while setting up an offsite virtualization, as the VLAN will be created on the server for the VM. This server will then be the "Master Server" for the VLAN, and the VLAN will be shared as needed. Only one VLAN with a given IP scheme can exist on a master server (For example, if a VLAN with the subnet 192.168.2.0/24 already exists and is in use, you will not be able to create it, and would need to either select a different networking scheme or reach out to Datto Technical Support for assistance).

Offsite VLANs for cloud VMs are limited to /22 or 255.255.252.0 to avoid using large sections of available addresses for a small amount of VMs. The 192.168.122.0/24 subnet cannot be used for offsite VLANs. This subnet is in use for internal resources.

VLAN Cleanup

Remove the old VLANs after your Disaster Recovery or DR test scenario is completed. This helps keep those subnets available when needed. Otherwise, unless your virtualization occurred on a private node, multiple devices from multiple partners will be syncing and potentially virtualizing on the given offsite server. Removal of inactive VLANs ensures that commonly used subnets (such as 192.168.1.0/24 and 10.1.1.0/24) will remain available. 


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