Administration
Packet Capture
Cisco WAP131 and WAP351 Administration Guide 62
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tool. When capturing 802.11 traffic, a large portion of the captured frames tends to
be beacons (typically sent every 100 ms by all access points). Although Wireshark
supports a display filter for beacon frames, it does not support a capture filter to
prevent the WAP device from forwarding the captured beacon packets to the
Wireshark tool. To reduce the performance impact of capturing the 802.11
beacons, disable the capture beacons mode.
Packet Capture Status
The Packet Capture Status area shows the status of a packet capture, if one is
active on the WAP device.
• Current Capture Status—Whether the packet capture is running or
stopped.
• Packet Capture Time—The elapsed capture time.
• Packet Capture File Size—The Local File capture file size; cannot record
Remote capture file size.
Click Refresh to show the latest data from the WAP device, or click Stop Capture
to stop a packet file capture.
Packet Capture File Download
You can download a capture file by TFTP to a configured TFTP server, or by
HTTP/HTTPS to a computer. A capture is automatically stopped when the capture
file download command is triggered.
Because the capture file is located in the RAM file system, it disappears if the WAP
device is reset.
To download a packet capture file using TFTP:
STEP 1 Select Administration > Packet Capture.
STEP 2 Check Use TFTP to download the capture file.
STEP 3 Enter the TFTP Server Filename to download if it is different from the default. By
default, the captured packets are stored in the folder file /tmp/apcapture.pcap on
the WAP device.
STEP 4 Specify a TFTP Server IPv4 Address in the field provided.
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