The Cisco Stack Layer
Using the test mapped to this layer, administrators can figure out the current status of the switch and the role of the switch.
Figure 1 : The Cisco Stack Layer
By default, this layer will appear only when the Stack Switch Status test is enabled. To enable the test, go to the ENABLE / DISABLE TESTS page using the menu sequence : Agents -> Tests -> Enable/Disable, pick Cisco Catalyst Switch as the desired Component type, set Performance as the Test type, choose the test from the DISABLED TESTS list, and click on the < button to move the test to the ENABLED TESTS list. Finally, click the Update button.