Indicates the source point type of VLAN-connect table.
Options:
1. port(1) -indicates that hwVlanConnectDstPara is ifindex.
2. flow(2) -indicates that hwVlanConnectDstPara is flow index.
3. bundle(3) -indicates that hwVlanConnectDstPara is bundle index.
4. invalid(-1) -indicates that hwVlanConnectDstPara is invalid.