OpenView Network Node Manager: Designing and Implementing an Enterprise Solution

Estimating the Size of a Management Domain

You desperately need to have a handle on the size of the management domain in order to properly size a new NNM system. There is nothing more embarrassing than to deploy an NNM system, go through the autodiscovery and map building process, create user accounts, and then have nothing but complaints about performance from these same users.

Motivated to limit embarrassment, you begin estimating the management domain. How many devices and interfaces will be in it? There are several approaches available to us, so let’s review them one at a time.

One estimate for the number of devices is to take the number of subnets in the management domain times the maximum theoretical number of IP addresses available in ...