Description: The value of the object vRtrIfDHCP6RelayItfIdOption specifies whether or not the interface-id option is added by the DHCP6 relay agent, and, if it is present, what information goes in it. If the value of this object is set to 'none', the option is not added by the relay agent. In all other cases the option is added to the relay message. The content of the option is defined as follows: - 'ifIndex' - the value of the interface index is used. - 'asciiTuple' - the ASCII-encoded concatenated tuple consisting of the - access-node-identifier - service-id - interface-name - SAP-id (only if the value of vRtrIfType is 'serviceIesGroup') - 'sapId' - the ASCII-encoded SAP-id is used. - 'string' - the value of the object vRtrIfDHCP6ItfIdString is used.