User`s guide

290 Dialogic
®
1000 and 2000 Media Gateway Series User’s Guide
Diagnostics
to disable individual interfaces. The second level of filtering is on the protocol level. When an
interface is enabled (Capture), you have the ability to filter (not log) different protocols. A check
mark in the box means the Gateway will not log packets of the corresponding protocol.
To use the Network Capture, first select the interfaces to capture, check the protocols you do not
want to log, click Apply Filters and then click Start Capturing. Logging starts and the display
changes to show the state of the log. An example of a running log is shown in Figure 64.
Figure 64. Example of Running Log - Network Capture
When the Network Capture is running, the fill level of the log is displayed. The log uses a circular
buffer, so when it reaches capacity, new data overwrites the old. Once the log reaches capacity the
fill level does not change.
The log can be transferred to a PC by clicking Download. Doing this brings up a File Download
dialog box as shown in Figure 65. Select Save to save the file to the PC. After saving, you can view
the file with any network capture program that supports libpcap format (e.g. Ethereal).
Figure 65. File Download Dialog Box for Iplog.pcap
Important points to remember about Network Capture are:
• Downloading does not require any special software, but viewing requires Ethereal.
• On the Network Capture Web page, checking a protocol type causes it NOT to be captured.