Chapter 18 Diagnostics
NWA3000-N Series User’s Guide
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The following table describes the labels in this screen.
Table 92 Maintenance > Diagnostics > Packet Capture
LABEL DESCRIPTION
Interfaces Enabled interfaces (except for virtual interfaces) appear under Available
I nterfaces. Select interfaces for which to capture packets and click the
right arrow button to move them to the Capture I nterfaces list. Use the
[ Shift] and/ or [ Ctrl] key to select multiple objects.
IP Type Select the protocol of traffic for which to capture packets. Select any to
capture packets for all types of traffic.
Host IP Select a host IP address object for which to capture packets. Select any to
capture packets for all hosts. Select User Defined to be able t o ent er an I P
address.
Host Port This field is configurable when you set the I P Type to any, tcp, or udp.
Specify the port number of traffic to capture.
File Size Specify a maximum size limit in kilobytes for the total combined size of all
the capture files on the device, including any existing capture files and any
new capture files you generate.
Note: If you have existing capture files you may need to set this size larger or
delete existing capture files.
The valid range is 1 to 10000. The device stops the capture and generates
the capture file when either the file reaches this size or the time period
specified in the Duration field expires.
Duration Set a time limit in seconds for the capture. The device stops the capture
and generates the capture file when either this period of time has passed
or the file reaches the size specified in the File Size field. 0 means there is
no time limit.
File Suffix Specify text to add to the end of the file name (before the dot and filename
extension) to help you identify the packet capture files. Modifying the file
suffix also avoids making new capture files that overwrite existing files of
the same name.
The file name format is “interface name-file suffix.cap”, for example “lan-
packet-capture.cap”.
Number Of Bytes To
Capture (Per Packet)
Specify the maximum number of bytes to capture per packet. The device
automatically truncates packets that exceed this size. As a result, when
you view the packet capture files in a packet analyzer, the actual size of the
packets may be larger than the size of captured packets.
Capture Click this button to have the device capture packets according to the
settings configured in this screen.
You can configure the device while a packet capture is in progress although
you cannot modify the packet capture settings.
The device’s throughput or performance may be affected while a packet
capture is in progress.
After the device finishes the capture it saves a separate capture file for
each selected interface. The total number of packet capture files that you
can save depends on the file sizes and the available flash storage space.
Once the flash storage space is full, adding more packet captures will fail.
Stop Click this button to stop a currently running packet capture and generate a
separate capture file for each selected interface.
Reset Click this button to return the screen to its last-saved settings.
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