ZyXEL Communications ZyWall USG20-VPN, User Manual

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Chapter 33 Diagnostics
USG20(W)-VPN Series User’s Guide
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33.7.1 The Wireless Frame Capture Files Screen
Click Maintenance > Diagnostics > Wireless Frame Capture > Files to open this screen. This
screen lists the files of wireless frame captures the USG has performed. You can download the files
to your computer where you can study them using a packet analyzer (also known as a network or
protocol analyzer) such as Wireshark.
Figure 446
Maintenance > Diagnostics > Wireless Frame Capture > Files
The following table describes the labels in this screen.
File Prefix Specify text to add to the front of the file name in order to help you identify frame
capture files.
You can modify the prefix to also create new frame capture files each time you
perform a frame capture operation. Doing this does no overwrite existing frame
capture files.
The file format is: [file prefix].cap. For example, “monitor.cap”.
Capture Click this button to have the USG capture frames according to the settings
configured in this screen.
You can configure the USG while a frame capture is in progress although you cannot
modify the frame capture settings.
The USG’s throughput or performance may be affected while a frame capture is in
progress.
After the USG finishes the capture it saves a combined capture file for all APs. The
total number of frame capture files that you can save depends on the file sizes and
the available flash storage space. Once the flash storage space is full, adding more
frame captures will fail.
Stop Click this button to stop a currently running frame capture and generate a combined
capture file for all APs.
Reset Click this button to return the screen to its last-saved settings.
Table 275
Maintenance > Diagnostics > Wireless Frame Capture > Capture (continued)
LABEL DESCRIPTION
Table 276
Maintenance > Diagnostics > Wireless Frame Capture > Files
LABEL DESCRIPTION
Remove Select files and click Remove to delete them from the USG. Use the [Shift] and/or [Ctrl] key
to select multiple files. A pop-up window asks you to confirm that you want to delete.
Download Click a file to select it and click Download to save it to your computer.
# This column displays the number for each packet capture file entry. The total number of packet
capture files that you can save depends on the file sizes and the available flash storage space.