Running Tcpdump - AudioCodes C470HD User's And Administrator's Manual

CHAPTER 7 Troubleshooting

Running Tcpdump

Tcpdump is a common packet analyzer that allows network administrators to display TCP/IP
and other packets transmitted or received over the IP telephony network, for debugging
purposes.
➢ To run Tcpdump:
1. In the Android Phone Utility (see Android Phone Utility on page 121 for more information
about the application), enter the phone's IP address, click SSH Connect and browse to a
folder on the PC to which to send the information.
2. Next to the Tcpdump button, set the time period or leave it at the default. Default: 30
seconds.
3. Click the Tcpdump button and then after the progress indicator reaches the end you'll view
in the results pane a 'Finished' indication.
4. Open the folder on the PC to which you commanded the application to send the
information and locate and open the file 'net.pcap'.
Alternatively, run Tcpdump without the utility.
➢ To run tcpdump without the utility:
1. Access the phone via SSH and run the following commands:
setprop ac.ac_tcpdump.timeout <seconds>
2. After defining the capturing time as shown in the preceding command, start the capture:
setprop ac.ac_tcpdump 1
3. Tcpdump capture file will appear in this location:
/sdcard/recording/net.pcap
4. After running Tcpdump, reproduce the issue.
5. Execute the following command from your PC command prompt (cmd):
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