Linux instances cannot configure the target port as a Bridge Port.
Another operating system already uses a Bridge Port on the HiperSockets
or on the OSA adapter. For example, a z/VM instance might be using
a port in a VSWITCH configuration. Multiple Bridge Ports on the same
HiperSockets or OSA adapter must be configured by instances of the same
operating system, for example, all Linux or all z/VM.
User response
Reconsider your network topology. Configure Bridge Ports only for ports
on adapters where any other Bridge Ports are configured by other Linux
instances.