February 8, 2016
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Microsoft SCCM OSD support published a nice article about the subj: http://blogs.technet.com/b/system_center_configuration_manager_operating_system_deployment_support_blog/archive/2015/08/27/re_2d00_use-the-same-nic-for-multiple-pxe-initiated-deployments.aspx
You basically need to add MAC address of a docking station or USB NIC you use for multiple machines to SCCM Discovery exclusion via editing SCCM registry as described:
This can be done by opening Regedit on the site server and navigating to the following registry key:
followed by editing the registry value of:
This registry key value is a multi-string value that is the placeholder of the list of MAC addresses to be filtered. The registry key holds one MAC address per line in the following format:
Note the known computers should be introduced with GUID instead of MAC after that. Please read details in the article.