# Top N Chart

The Top N chart shows the current top N worst ports measured by the selected metric. `The parameter can be changed with the Setup Wizard, or in this chart.`

The port labels on the left side are color coded with issue states. Move your mouse over a label to show a description of the state, indicated by the following colors:

- Dark Gray – no issue

- Blue – PMA ignore

- Yellow – PMA no response

- Red – Topology no response

Right-click a port to open a context menu to drill down to view this port's performance or topology.