To establish a connection between a production VM and a VM replica on the cloud host after partial site failover, Veeam Backup & Replication maps the production network and the virtual network provided to tenant replicas through the hardware plan. As a part of this process, Veeam Backup & Replication applies network settings of the replicated VM to the dedicated SP network extension appliance.
For Windows-based VMs, Veeam Backup & Replication detects network settings of replicated VMs automatically during every run of a replication job targeted at the cloud host. Veeam Backup & Replication can detect network settings of replicated VMs in the following ways:
- If application-aware processing is enabled for a replication job targeted at the cloud host, Veeam Backup & Replication collects network settings of a replicated VM via the runtime process deployed on this VM for performing guest processing tasks. The runtime process collects network settings of a VM along with information required for VSS-aware restore. To learn more, see the Application-Aware Processing section in the Veeam Backup & Replication User Guide.
- For replication jobs targeted at the cloud host, Veeam Backup & Replication collects network settings of replicated VMs within additional step in the replication process. After all VM data is transferred from the source host to the cloud host, Veeam Backup & Replication mounts the system disk of a VM replica to the SP Veeam backup server and collects network settings from the registry of the replica. This method helps detect network settings of a replica in case application-aware processing is not enabled for the job. However, application-aware processing is a more consistent and reliable method to collect network settings of replicated VMs.
- For VM replicas created from backup files (remote replica from backup scenario), Veeam Backup & Replication applies to the replica network settings that were collected from a VM during the backup process.
If the tenant creates replicas of Windows-based VMs and the number of production networks equals the number of virtual networks on the cloud host, the tenant does not need to specify network mapping settings. Veeam Backup & Replication maps production and virtual networks automatically. After failover, a VM replica in a cloud virtual network will act as if it is connected to the original production network.
For more advanced scenarios, the tenant can create a network mapping table for the replication job targeted at the cloud host. For example, this may be required when the cloud host has fewer networks than the number of networks in the production infrastructure.
Specifying network mapping settings is also obligatory if non-Windows VMs are included into the replication job. Automatic network mapping for non-Windows VMs is not currently supported in Veeam Cloud Connect Replication.