The value of this object identifies, for SNMP, the ATM DXI interface for which this entry contains management information. This is the same value as used to identify the IfEntry describing the DCE interface. Management uses and expects this value. In the proxy mode of operation, the DCE always treats this as 0, but preserves it in its response to the DTE. 0, the DXI value, means the interface over which the DXI LMI request was received.