If 'true', specifies that Password Authentication Protocol (PAP) shall be negotiated before Challenge Handshake Authentication Protocol (CHAP). IF 'false', then CHAP is negotiated before PAP. With SNMP get operations, both rbnBindAuthChap and rbnBindAuthPap must be true or this object is not instantiated. With SNMP set operations, if 'true', then both rbnBindAuthChap and rbnBindAuthPap must also be specified as 'true'. This object is applicable only when one of the following rbnBindType values is specified: authBind multiIntfBind multiSubBind If the value of rbnBindType is not one of these bind types, then rbnBindAuthPapFirst is not instantiated for this entry. When performing a set operation on a row which involves one of these bind types, specification of this column is optional. If not specified, this object will not be instantiated.