dropwatch (1) - Linux Manuals

dropwatch: kernel dropped packet monitoring utility

Command to display dropwatch manual in Linux: $ man 1 dropwatch

dropwatch - kernel dropped packet monitoring utility

dropwatch [-l <method> | list]

dropwatch dropwatch is an interactive utility for monitoring and recording packets that are dropped by the kernel

-l <method> | list: Select the translation method to use when a drop alert arrives. By default the raw instruction pointer of a drop location is output, but by the use of the -l option, we can assign a translation method so that the instruction pointer can be translated into function names. Currently supported lookup methods are:

kas - use /proc/kallsyms to lookup instruction pointers to function mappings

start: Tells the kernel to start reporting dropped packets
stop: Tells the kernel to discontinue reporting dropped packets
exit: Exits the dropmonitor program
help: Displays summary of all commands
set alertlimit <value>: Sets a triggerpoint to stop monitoring for dropped packets after <value> alerts have been received