dwdump(1)

1dwdump(1)                   General Commands Manual                  dwdump(1)
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NAME

6       dwdump - dump kernel dropped packets to a file
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SYNOPSIS

9       dwdump [ OPTIONS ]
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OPTIONS

14       -w, --write FILE
15              Dump packets to provided file in pcap format. Defaults to stan‐
16              dard output.
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19       -t, --trunc LENGTH
20              Ask the kernel to truncate packets to provided length. Defaults
21              to no truncation.
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24       -q, --query
25              Query the kernel for current configuration and exit.
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28       -l, --limit LIMIT
29              Ask the kernel to set the per-CPU packet queue limit to provided
30              limit.  Defaults to 1,000 packets.
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33       -p, --passive
34              Only listen on notified packets with no configuration. This is
35              useful if the kernel is already monitoring dropped packets and
36              you only want to open another listening socket.
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39       -s, --stats
40              Query the kernel for statistics and exit.
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43       -b, --bufsize SIZE
44              Set the socket's receive buffer to provided size. Defaults to
45              1MB.
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48       -o, --origin { sw | hw }
49              Ask the kernel to only monitor software or hardware originated
50              drops. Defaults to both. See devlink-trap(8) for details on how
51              to get hardware originated drops to the kernel.
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54       -e, --exit
55              Ask the kernel to stop monitoring and exit.
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EXAMPLES

59       dwdump -w drops.pcap
60           Dump dropped packets to a file.
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62       dwdump | tshark -V -r -
63           Pipe dropped packets to Wireshark.
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65       dwdump -o sw -w drops.pcap
66           Only monitor software originated drops.
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68       dwdump -q
69           Query current configuration from the kernel and exit.
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NAME

SYNOPSIS

OPTIONS

EXAMPLES

SEE ALSO