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Chapter 15: Status
Capturing Network Traffic Data
The BSC allows you to capture network traffic data on any of its physical or VLAN
interfaces, filter the packets using specified criteria, and then save the data as a file.
You can then either display the data file on screen or import the file into any network
analyzer program, such as Ethereal or TCP Dump.
To capture BSC network traffic:
1.
Click the Status tab in the BSC administrator console, click the Diagnostics tab, and
then click the Traffic Capture link at the top of the page.
The Traffic capture page appears as shown in Figure 15-16.
Configure the following traffic capture options as appropriate:
2.
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Click the Start button to start capturing traffic data.
3.
Note: You can run multiple traffic captures simultaneously.
The in-process traffic capture is listed as a job file in the Job Control drop-down list
using a name string such as 3162 tcpdump -i eth0 -c 100 -w prot.dmp, where the
filename you specified with the .DMP extension appended appears at the end of the
string.
Optional. To stop capturing data at any point, choose the name of the file from the
4.
Job Control drop-down list and then click Stop.
To display or download the contents of the traffic capture file, select the name of the
5.
.DMP file from the Choose file drop-down list, mark the Download radio button, and
then click the Submit button.
You are prompted whether you wish to save or display the file.
15-20
Figure 15-16: Traffic Capture Page
File Name - Name for the traffic capture file. The BSC appends a .DMP extension
to the saved file name when you stop the capture operation.
Ethernet interface - BSC physical or VLAN interface from which to capture packet
data.
Filter - Restrict the type of packets captured to provide more meaningful results.
You can filter packets by a selected protocol and source or destination IP,
netmask, and MAC addresses.
Number of Records - Specify the maximum number of packets to capture. Use this
setting to prevent excessive file size.
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