MIB's version : Version 2: the current VLAN MIB replaced the previous one; Version 3: field vlanPortForbiddenEgressPort was added. Version 4: dot1q and dot1v supported Version 5: Private Edge Vlan vlanPrivateEdgeSupported vlanPrivateEdgeMibVersion vlanPrivateEdgeTable
Sources for this description
D-Link official switch MIBsD-Link MIB copies (LibreNMS/Observium Community)