The lack of an appropriate external data model is one of the reasons for the dearth of eective network management applications. Many network management computations over Management Information Bases (mibs ) cannot be practically accomplished through remote interactions. This paper describes the design of an mib Computations System that supports the dynamic denition of external data models for mibs. The system consists of a View Denition Language (vdl) to specify mib external views and snmp-agent extensions that implement them. vdl views dene new mib variables, which are computed via instrumentations performed by a Management-by-Delegation (mbd) server, and which can be queried via the Simple Network Management Protocol, (snmp).
Germán S. Goldszmidt