Capturing Exception Traffic

1. From the top menu, click Controller.
2. In the left pane, click Network > Utilities.
   The Wireless Controller Utilities screen is displayed.
3. In the Tcpdump Management Port drop-down list, click the port on which the exception traffic travels that you want to capture.
4. In the Filename box, type the name for the captured traffic file. The default name is mgmt_traffic_dump.cap.
5. In the Capture File Size (MB) box, type the maximum size for the captured traffic file. 10 MB is the minimum and 1 GB is the maximum size of the captured traffic file.
6. If applicable, in the Destination drop-down list, select one of the following:
   • Flash – Click to save the file on the flash card.
   • Local – Click to save the file locally on the controller.
     

     Note

     The Destination drop-down list is only available if the controller has a mounted flash device. For more information, see Working with an External Storage Device.
7. Click Start. A dialog is displayed informing you the previously captured file will be removed.
8. To continue with the exception traffic capture, click OK. A dialog is displayed informing you the capture has started.
   If applicable, to stop the capture before it is completed, click Stop.

   To export an Exception Traffic Capture File:

9. From the top menu, click Controller.
10. In the left pane, click Network > Utilities.
    The Wireless Controller Utilities screen is displayed.
11. In the Capture Files on System drop-down list, click the capture file you want to export, and then click Export.
    A File Download dialog is displayed asking you where you want to save the file.
12. Click Save.
13. Navigate to the location on your network where you want to save the file, and then click Save.