ModSnmp Manual v3.14 - 8.1. Defining Constant OIDs
The Add Constant OID page enables you to define OIDs with constant values.
To add a constant-valued OID, enter the following data and then click Apply:
Description. Optionally enter a description of the OID. This is displayed in the Constant OIDs page, but is not used by ModSnmp in any other way.
OID. Enter the OID to be mapped. This should be the complete OID, including the instance identifier on the end. For example, you would enter "1.3.6.1.2.1.1.5.0" for the 'sysName' OID.
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Type. Select the SNMP type to be used when sending the value to SNMP managers.
ModSnmp supports the following SNMP types for constants (see RFC 2578 for fuller descriptions):
Table 3. SNMP types
SNMP type Description Integer32 An Integer32 is a signed 32-bit integer (i.e. in the range -2147483648 to 2147483647 decimal). The INTEGER type used in SNMPv1 is identical to Integer32. Unsigned32 An Unsigned32 is an unsigned 32-bit integer (i.e. in the range 0 to 4294967295 decimal). Gauge32 A Gauge32 is also an unsigned 32-bit integer (i.e. in the range 0 to 4294967295 decimal). Counter32 A Counter32 is an unsigned 32-bit integer (i.e. in the range 0 to 4294967295 decimal) that monotonically increases until it reaches a maximum value of 4294967295, when it wraps around and starts increasing again from zero. A Counter32 is read-only. TimeTicks A TimeTicks is an unsigned 32-bit integer (i.e. in the range 0 to 4294967295 decimal) that represents a time interval in hundredths of a second. Counter64 A Counter64 is an unsigned 64-bit integer (i.e. in the range 0 to 18446744073709551615 decimal) that monotonically increases until it reaches a maximum value of 18446744073709551615, when it wraps around and starts increasing again from zero. A Counter64 is read-only. OctetString An OctetString is arbitrary binary or textual data. If you select OctetString, the value will be sent in the SNMP response as UTF-8 text. You may need to restrict the text to the ASCII subset of UTF-8 for it to be displayed correctly by the SNMP manager. OID The OID type represents administratively assigned names. Any instance of this type may have at most 128 sub-identifiers. Further, each sub-identifier must not exceed the value 2^32-1 (4294967295 decimal). The value should be entered in dotted-decimal form (e.g. "1.3.6.1.4.1.34171.1.35"). IpAddress The IpAddress type represents a 32-bit internet address. The value should be entered in dotted-decimal form (e.g. "192.168.0.4").