Merging trace files with Mergecap
You can use Mergecap to merge two or more trace files into one file. The basic syntax is as follows:
mergecap –w <outfile.pcapng> infile1.pcapng infile2.pcapng …
For example:
mergecap –w merged.pacap source1.pcapng source2.pcapng source3.pcapng
One useful option you sometimes may want to use in Mergecap (and several of the other command-line utilities) is –s <snaplen>
. This will truncate the packets at the specified length past the start of each frame, resulting in a smaller file; a typical value for <snaplen>
is 128 bytes:
mergecap –w merged_trimmed.pcapng -s 128 source1.pcapng source2.pcapng
Mergecap batch file
If the capture files you want to merge have a variety of naming formats, you can create a MergeTraces.bat ...
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