Why connection to bond interface is lost after chaning the active slave interface ?

Issue

• After installing the system it couldn't succeed in activating bond interface, just one link out of two available remains active.
• After changing the active slave interface using command # ifenslave -c bondx ethx connection to bond interface/IP is lost.
• RHEL 6.6 with the updated tg3 driver of the driver disk works without any issues.