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Packet Capture
Cisco Small Business WAP551 and WAP561 Wireless-N Access Point 45
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formatted in pcap format and can be examined using tools such as
Wireshark and OmniPeek.
• Remote capture method—Captured packets are redirected in real time to
an external computer running the Wireshark tool.
The WAP device can capture these types of packets:
• 802.11 packets received and transmitted on radio interfaces. Packets
captured on radio interfaces include the 802.11 header.
• 802.3 packets received and transmitted on the Ethernet interface.
• 802.3 packets received and transmitted on the internal logical interfaces
such as VAPs and WDS interfaces.
Click Administration > Packet Capture to show the Packet Capture page. From
the Packet Capture page you can:
• Configure packet capture parameters.
• Start a local or remote packet capture.
• View the current packet capture status.
• Download a packet capture file.
The Packet Capture Configuration area enables you to configure parameters and
initiate a packet capture.
To configure packet capture settings:
STEP 1 Configure these parameters:
• Capture Beacons—Enables or disables the capturing of 802.11 beacons
detected or transmitted by the radio.
• Promiscuous Capture—Enables or disables promiscuous mode when the
capture is active.
In promiscuous mode, the radio receives all traffic on the channel, including
traffic that is not destined to this WAP device. While the radio is operating in
promiscuous mode, it continues serving associated clients. Packets not
destined to the WAP device are not forwarded.
As soon as the capture is completed, the radio reverts to nonpromiscuous
mode operation.