You have external virtual switch with srv-io enabled with 10 Virtual Machines on it. You need to make the Virtual
Machines able to talk only to each other.

A.
remove the vswitch and recreate it as private.

B.
add new vswitch

C.
remove vswitch and recreate it as public

D.
adjust srv-io settings

Explanation:
You cannot change the settings of a vswitch with SR-IOV enabled, so you must delete it and recreate it.