> # Viewing Performance Information for Virtual Port Channels

> You can view the relationship among virtual port channels (vPCs). You can view the statistics of all member interfaces and the aggregate of the statistics at the port channel level.

> 1. From the menu bar, choose Performance > Virtual Port Channels (vPC).

> The vPC performance statistics appears and the aggregated statistics of all vPCs are displayed in a tabular manner.

> 2. Click on a device name in the Primary vPC peer or Secondary vPC peer column to view its member interface.

> A popup window displays the member interfaces of the selected device.

> 3. Click the Chart icon of the corresponding interface to view its historical statistics.

> The traffic distribution statistics appear at the bottom of the vPC window. By default, the Cisco DCNM Web Client displays the historical statistics for 24 hours.

> There are variations to this procedure. In addition to these basic steps, you can also perform the following steps to view detailed information for flows:

> - To change the time range for this graph, select it from the drop-down list in the upper right corner.
> - To view the detailed information for a specific period, drag the slider control to choose the time interval for which you need the information.
> - Use the chart icons to view the traffic chart in varied views.
> - You can also use the icons to Append, Predict and Interpolate Data.
> - To export the data into a spreadsheet, click the Export to Excel icon in the upper-right corner and then click Save.

> Note If the performance tables do not contain any data, see the Performance Manager Collections section to turn on performance data collection.

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