ASCOM i62 Troubleshooting Manual page 75

Troubleshooting Guide
Ascom i62 VoWiFi Handset
• A result without knowing what happened during the capture is of little use. Try to make
note of what the capture is designed to capture and what devices are involved, what
devices are present and what was expected to happen but did not.
• Try not to influence the monitored system. For example, if capturing wired traffic with
Wireshark or OmniPeek, consider disabling name resolution because each IP/name
lookup will generate traffic from your PC to the DNS server.
• If data on one channel is to be recorded the WLAN adapter can only be set to listen to
one channel. If roaming is going to be monitored, two or more channels need to be
monitored, in which case one adapter per channel is required.
D.2 Setting up the Handset for Wireshark Traces
Wireshark is a packet capture and trace tool that is particularly useful for analysing network
traffic and statistics captured from various protocols. With Wireshark, the support engineer
can capture and analyze traffic from a live network. Wireshark captures network traffic in
PCAP format, which requires the handset to be set to RPCAP logging mode.
To setup the handset for a Wireshark trace, perform the following steps:
D.2.1 Enable Logging
1 With the handset in idle mode, enter Menu > Settings > 40022. The Admin menu is
displayed.
2 Select Logging. The Logging menu is displayed.
3 Is the first menu item Logging mode RPCAP?
Yes: The handset is already setup for RPCAP logging. Go to step 7.
No: Go to step 4.
4 Select Logging mode <xxx> where xxx is one of the available alternative logging
modes. The Logging mode xxx menu is displayed.
5 Deselect the radio button associated with the alternative logging mode and select
the RPCAP radio button.
6 Return to the Logging menu by pressing the handset Back button.
7 Select Extended logging. The Extended logging options are displayed.
8 Tick the SIP checkbox. Ensure that the other checkboxes are not ticked.The handset is
now configured to provide Wireshark with the required traffic logs for the analysis.
D.2.2 Run Wireshark
To run a Wireshark session, you require the IP address of the handset. perform the following
steps:
1 With your handset still in Administrative mode, return to the Admin menu.
2 Select Device info. The Device info menu is displayed.
3 Select Network info. The Network info menu is displayed.
4 Make a note of the value of the Phone IP address.
D.2.3 Analyze Call
To analyze a call from the handset using Wireshark, perform the following steps:
1 Start Wireshark from the Wireshark icon on your desktop, taskbar or Start Programs
menu. The Wireshark Network Analyzer window is displayed.
2 Click Capture Options. The Wireshark: Capture Options window is opened.
28 June 2012 / Ver. A
Appendix D: External
TD 92685EN
72