Trimming data from your captures
Packet headers may contain the most useful information because they contain routing information and protocol details. You can discard the packet payload for more efficient troubleshooting.
Under these circumstances, you may want to truncate most payload data from the packet header(s). In Observer, the result is a partial packet capture.
Some benefits of partial packet captures include:
Smaller capture sizes
More overall storage space for packet captures
Greatly increases the effective storage size of a GigaStor (or other capture buffer)
Performance metrics remain intact
Increased overall privacy
Least resource intensive capturing
Some disadvantages of partial packet captures include:
Not all network traffic is stored to disk
Forensics may be hindered without full payload data
Data stream reconstruction may not work
Most resource intensive capturing
Increases CPU utilization
1. Choose Configuration > Packet Capture > Settings > Capture Options .
2. Enable Capture Partial Packets (Bytes).
 
Figure 46: Configuring partial packet captures
 
It is possible to decrease or increase the default 64-byte partial packet capture size. Click the Change Size button to set a custom value. From then on, each packets’ bytes following the target value are discarded from capture.