SMC Networks 6.20 manual Objects, Table.index notation

SNMP ENVIRONMENT

Here is a portion of the EZ Stack 10 MIB:

EZ Stack-10 DEFINITIONS ::= BEGIN

IMPORTS

OBJECT-TYPE, Counter, TimeTicks ,IpAddress

FROM RFC1155-SMI;

IMPORTS

DisplayString

FROM RFC1213-MIB-II;

enterprises OBJECT IDENTIFIER ::=

{iso(1) org(3) dod(6) internet(1) private(4) 1} smc OBJECT IDENTIFIER ::=

{enterprises 202 } hmBasicCapability

OBJECT IDENTIFIER ::= { smc 1} hmSelfTestCapability

OBJECT IDENTIFIER ::= { smc 2}

hmPerfMonCapability

OBJECT IDENTIFIER ::= { smc 3}

hmAddrTrackCapability

OBJECT IDENTIFIER ::= { smc 4}

The MIB itself has a hierarchical structure, defining objects in a tree-like structure. Using this model, the entire world can be defined from a single origin.

Objects

Real objects in the world of network management are variables that contain values. Data types may be numbers, character strings or structures. New data types may be created by renaming existing data types, limiting the range of values or structuring them using pre-defined methods. The SNMP MIB uses only a small portion of the data types and structuring methods defined in ASN.1. See IETF documents RFC 1212 and 1213 for more information.

table.index notation

Objects are organized into tables. Each table represents a group of objects that may have multiple instances; for example, the hrDeviceEntry table in the HR MIB contains values for device index, type, description, ID, status, and errors. Each object has a set of values representing its operating status. While the “dotted” notation for the hrDeviceEntry table is 1.2.6.1.36.2.1, the notation for the hrDeviceIndex field is 1.2.6.1.36.2.1.1. Multiple instances in a table are identified by an index number.

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