Cisco WAP571 Administration Manual page 59

Administration
Packet Capture
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
STEP 6
STEP 7
NOTE
Cisco WAP571/E Administration Guide
On the same computer, initiate the Wireshark tool.
In the menu, select Capture > Options. A popup window appears.
At Interface, select Remote. A popup window appears.
At Host, enter the IP address of the WAP device.
At Port, enter the port number of the WAP. For example, enter 2002 if you used the
default, or enter the port number if you used a port other than the default.
Click OK.
Select the interface from which you need to capture packets. At the Wireshark
popup window, next to the IP address, there is a pull-down list for you to select the
interfaces. The interface can be one of the following:
Linux bridge interface in the wap device
--rpcap://[192.168.1.220]:2002/brtrunk
Wired LAN interface
-- rpcap://[192.168.1.220]:2002/eth0
VAP0 traffic on radio 1
-- rpcap://[192.168.1.220]:2002/wlan0
802.11 traffic
-- rpcap://[192.168.1.220]:2002/radio1
At WAP571/E, VAP1 ~ VAP7 traffic for radio 1
-- rpcap://[192.168.1.220]:2002/wlan0vap1 ~ wlan0vap7
At WAP571/E, VAP1 ~ VAP7 traffic for radio 2
-- rpcap://[192.168.1.220]:2002/wlan1vap1 ~ wlan1vap7
You can trace up to four interfaces on the WAP device at the same time. However,
you must start a separate Wireshark session for each interface. To initiate
additional remote capture sessions, repeat the Wireshark configuration steps; no
configuration needs to be done on the WAP device.
The system uses four consecutive port numbers, starting with the configured port
for the remote packet capture sessions. Verify that you have four consecutive port
numbers available. We recommend that if you do not use the default port, use a port
number greater than 1024.
When you are capturing traffic on the radio interface, you can disable beacon
capture, but other 802.11 control frames are still sent to Wireshark. You can set up
a display filter to show only:
• Data frames in the trace
• Traffic on specific Basic Service Set IDs (BSSIDs)
• Traffic between two clients
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