OpenView Network Node Manager: Designing and Implementing an Enterprise Solution

SNMP Performance Data in MIB2 and Private MIBs

There are hundreds of useful variables in the industry standard MIB-2. Most are located in the interfaces section, and a few more can be found in the IP section. It is prudent to limit the amount of data you collect to the bare essentials. This avoids overloading SNMP agents, taxing the network, and storing a lot of unnecessary performance data on the hard drive.

Often, a single variable does not tell the whole story by itself. For example, the number of input errors on an interface is meaningless by itself. You have to divide it by the number of received packets and multiply by 100 before it’s possible to judge if the error rate is too high.

NNM lets you form mathematical formulas comprised of ...