snBgp4NeighGenCfgUpdateSrcLpbIntf 1.3.6.1.4.1.11.2.3.7.11.12.2.11.6.1.1.12

To allow internal BGP sessions to use any operational loopback interface (1..8) for TCP connections. Zero interface means to restore the interface assignment to the closest interface, which is called the best local address.