Indicates the source point value of VLAN-connect table.
If hwVlanConnectDstType is equal to invalid(-1), this leaf indicates invalid.
If hwVlanConnectDstType is equal to port(1), this leaf indicates ifindex.
If hwVlanConnectDstType is equal to flow(2), this leaf indicates flow index.
If hwVlanConnectDstType is equal to bundle(3), this leaf indicates bundle index.