By default, when you configure a virtual machine for replication to cloud, its NICs and MAC addresses are copied automatically to the target site as part of the provisioning of the placeholder virtual machine.
About this task
If the test network is not isolated from the production network and these networks have common routing, a test recovery of a replicated virtual machine might result in duplicate MAC addresses in your virtual data center.
To avoid duplicate MAC addresses in your data center, you can disable the automatic copying of network configurations from the source site to cloud sites.
Disabling the automatic copying of network configurations does not delete the configurations that are already replicated to the target site. See http://kb.vmware.com/kb/2086292 .
Procedure
Results
The automatic copying of network configurations to target cloud sites is disabled for all newly configured replications.