Group and row identifiers
- Last UpdatedFeb 13, 2023
- 1 minute read
- PI System
- PI Interface for SNMP 1.7.0.37
- Interfaces
To handle row-indexed dynamic OIDs, you can use these settings to specify the group and sequence number of an OID. Set the OID_G= parameter to specify an OID group and OID_G_R= to designate the row in the group.
For example, to read the second OID in the .1.3.6.1.2.1.87.1.3.1.3 group, specify OID_G=.1.3.6.1.2.1.87.1.3.1.3; OID_G_R=2;
If a scan returns the following group of OIDs:
.1.3.6.1.2.1.87.1.3.1.3.25
.1.3.6.1.2.1.87.1.3.1.3.49
.1.3.6.1.2.1.87.1.3.1.3.53
the interface reads from
.1.3.6.1.2.1.87.1.3.1.3.49
If the subsequent scan returns:
.1.3.6.1.2.1.87.1.3.1.3.19
.1.3.6.1.2.1.87.1.3.1.3.44
.1.3.6.1.2.1.87.1.3.1.3.54
the interface reads from
.1.3.6.1.2.1.87.1.3.1.3.44
Note: Reading a row-indexed OID takes longer than reading an absolute OID. For best performance, you should specify fixed OIDs by using the OID= parameter, and use the OID_G= and OID_G_R= parameters for dynamic OIDs only.