IB_EVENT_PATH_MIG_ERR
[IB_EVENT_PATH_MIG_ERR] = "path migration error",
event.event = IB_EVENT_PATH_MIG_ERR;
event.event = IB_EVENT_PATH_MIG_ERR;
event.event = IB_EVENT_PATH_MIG_ERR;
IB_EVENT_PATH_MIG_ERR);
case IB_EVENT_PATH_MIG_ERR: