The Hosts Layer

This layer quickly reveals the bad host ports on a controller, busy host ports, external hosts connecting to the LUN that are in a failed state currently, external hosts that are overloading the array, and overloaded host ports on the controller.

Figure 1 : The tests mapped to the Hosts layer

The tests mapped to this layer are discussed in the following topics:

• EVA Controller to Host Port Status Test
• EVA Host to LUN Mapping Test
• EVA Host To Array Requests Test
• EVA Host To Controller Traffic Test