The image below is a map showing a server and the iSCSI storage systems that it depends on. The service direction is shown by the arrows and the line widths correspond the the amount of bandwidth consumed by each association.

In addition to understanding the logical relationship between systems, it is important to be able to map relationships to the underlying physical resources that they depend on. In this case, it is interesting to know the network resources providing connectivity between the server and the storage system that it is most actively accessing,