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Unied Access Point Administrator’s Guide
Unied Access Point Administrator’s Guide
Page 90
October 2017
Section 7 - Maintaining the Access Point
Packet File Capture
In Packet File Capture mode the AP stores captured packets in the RAM le system.
Upon activation, the packet capture proceeds until one of the following occurs:
•) The capture time reaches congured duration.
•) The capture le reaches its maximum size.
•) The administrator stops the capture.
During the capture, you can monitor the capture status, elapsed capture time, and the current capture le size. This
information can be updated, while the capture is in progress, by clicking Refresh.
Figure 60 - Packet File Capture
The following table describes the elds to congure the packet capture status.
Field Description
Capture Interface Select an AP Capture Interface name from the drop-down menu. AP capture interface
names are eligible for packet capture are:
•) brtrunk - Linux bridge interface in the AP
•) eth0 - 802.3 trafc on the Ethernet port.
•) wlan0 - VAP0 trafc on radio 1.
•) wlan1 - VAP0 trafc on radio 2.
•) radio1 - 802.11 trafc on radio 1.
•) radio2 - 802.11 trafc on radio 2.
•) wlan0vap1 to wlan0vap15. Trafc on the specied VAP on Radio 1.
•) wlan1vap1 to wlan1vap 15. Trafc on the specied VAP on Radio 2.
•) wlan0wds0 to wlan0wds3. Trafc on the specied WDS interface.
Capture Duration Specify the time duration in seconds for the capture (range 10 to 3600).
Max Capture File
Size
Specify the maximum allowed size for the capture le in KB (range 64 to 4096).
Table 53 - Packet File Capture
Remote Packet Capture
Remote Packet Capture allows you to specify a remote port as the destination for packet captures. This feature works
in conjunction with the Wireshark network analyzer tool for Windows. A packet capture server runs on the AP and
sends the captured packets via a TCP connection to the Wireshark tool.
A Windows PC running the Wireshark tool allows you to display, log, and analyze captured trafc.
When the remote capture mode is in use, the AP doesn’t store any captured data locally in its le system.
Your can trace up to ve interfaces on the AP at the same time. However, you must start a separate Wireshark session
for each interface. You can congure the IP port number used for connecting Wireshark to the AP. The default port
number is 2002. The system uses 5 consecutive port numbers starting with the congured port for the packet capture
sessions.
If a rewall is installed between the Wireshark PC and the AP, these ports must be allowed to pass through the
rewall. The rewall must also be congured to allow the Wireshark PC to initiate TCP connection to the AP.
To congure Wireshark to use the AP as the source for captured packets, you must specify the remote interface in the
90


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