OpenView Network Node Manager: Designing and Implementing an Enterprise Solution

The Management Station and Collection Station Relationship

You begin your understanding of distributed network management with a clear definition of the two NNM systems in the hierarchy. Let’s emphasize that there are exactly two levels in this hierarchy and that any trickery to attempt to generalize this won’t work, at least as of NNM 6.1 or previous versions. The higher level NNM system in the hierarchy is the management station and the lower level NMM system is the collection station. See Figure 6-1.

Figure 6-1. Overlapping collection domains.

Three collection stations are shown here with a small amount of overlap in their collection domains. The management station applies “the nine rules” to resolve any discrepancies among common objects ...