Replication Scenarios

Veeam Backup & Replication supports a number of replication scenarios that depend on the location of the target host:

  • On-site replication. If the target host is located in the same site as the source host, use the on-site replication scenario.
  • Off-site replication. If the target and source hosts are located in different sites, use the off-site replication scenario.

Depending on the scenario you are planning to use, different backup infrastructure components will be involved in the replication process. For more information on the components, see Backup Infrastructure for Replication.

On-Site Replication

On-site replication requires the following backup infrastructure components:

In the on-site replication scenario, Veeam Backup & Replication does not perform data compression. Replication traffic is transferred decompressed between the two Veeam Data Mover started on the same backup proxy.

Replication Scenarios 

Off-Site Replication

For the off-site replication scenario, you must use at least two backup proxies:

Depending on the network speed between the production and DR sites, off-site replication can run in two ways:


With off-site replication, you can also use technologies that help reduce the amount of replication traffic and streamline replica configuration: replica seeding and mapping, network mapping and re-IP rules.

Replication Directly over Backup Proxies

Off-site replication directly over backup proxies requires the following backup infrastructure components:

In the off-site replication scenario, Veeam Backup & Replication uses data compression. Veeam Data Mover on the source backup proxy compresses VM data blocks and sends them to the target backup proxy in the compressed format. Veeam Data Mover on the target backup proxy decompresses VM data and stores it to a datastore in a native VMware vSphere format.

Replication Scenarios 

Replication over WAN Accelerators

Off-site replication over WAN accelerators requires the following backup infrastructure components:

In the off-site replication scenario using WAN accelerators, Veeam Backup & Replication compresses VM data. VM data blocks are compressed on the source WAN accelerator, transported to the DR site in the compressed format and decompressed on the target WAN accelerator.