{{{tracefilter}}} copies all packets that match a user-specified bpf filter to an output trace, creating a new filtered sub-trace.

=== Usage ===
{{{tracefilter inputuri bpffilter outputuri}}}

=== Applications ===
==== Capturing a trace file using a filter ====
{{{
tracefilter int:eth0 "tcp port 80" erf:http_only.erf.gz
}}}

==== Filtering an existing trace ====
{{{
tracefilter erf:trace.erf.gz "host 192.168.2.110" erf:single_host.erf.gz
}}}

=== Notes ===
 * {{{tracefilter}}} is a limited version of [TraceSplit tracesplit] which is a far more flexible tool.