Gets more precise interface information, if available

ifIndex -- obtained from oid instance, must map to entry in ifTable

ifName -- used as LI Name in Redcell model also optionally the name of the interface or port

ifHighSpeed -- used as speed for port in Redcell model


If supported, identifies sub-interfaces and places interfaces in Redcell model

ifStackHigherLayer -- obtained from oid instance

ifStackLowerLayer -- obtained from oid instance

ifStackStatus -- Used to understand if entry is active or not