.TH "Match-all classifier in tc" 8 "21 Oct 2015" "iproute2" "Linux"

.SH NAME
matchall \- traffic control filter that matches every packet
.SH SYNOPSIS
.in +8
.ti -8
.BR tc " " filter " ... " matchall " [ "
.BR skip_sw " | " skip_hw
.RI " ] [ "
.B action
.IR ACTION_SPEC " ] [ "
.B classid
.IR CLASSID " ]"
.SH DESCRIPTION
The
.B matchall
filter allows to classify every packet that flows on the port and run a
action on it.
.SH OPTIONS
.TP
.BI action " ACTION_SPEC"
Apply an action from the generic actions framework on matching packets.
.TP
.BI classid " CLASSID"
Push matching packets into the class identified by
.IR CLASSID .
.TP
.BI skip_sw
Do not process filter by software. If hardware has no offload support for this
filter, or TC offload is not enabled for the interface, operation will fail.
.TP
.BI skip_hw
Do not process filter by hardware.
.SH EXAMPLES
To create ingress mirroring from port eth1 to port eth2:
.RS
.EX

tc qdisc  add dev eth1 handle ffff: ingress
tc filter add dev eth1 parent ffff:           \\
        matchall skip_sw                      \\
        action mirred egress mirror           \\
        dev eth2
.EE
.RE

The first command creates an ingress qdisc with handle
.BR ffff:
on device
.BR eth1
where the second command attaches a matchall filters on it that mirrors the
packets to device eth2.

To create egress mirroring from port eth1 to port eth2:
.RS
.EX

tc qdisc add dev eth1 handle 1: root prio
tc filter add dev eth1 parent 1:               \\
        matchall skip_sw                       \\
        action mirred egress mirror            \\
        dev eth2
.EE
.RE

The first command creates an egress qdisc with handle
.BR 1:
that replaces the root qdisc on device
.BR eth1
where the second command attaches a matchall filters on it that mirrors the
packets to device eth2.

To sample one of every 100 packets flowing into interface eth0 to psample group
12:
.RS
.EX

tc qdisc add dev eth0 handle ffff: ingress
tc filter add dev eth0 parent ffff: matchall \\
     action sample rate 100 group 12
.EE
.RE

.EE
.SH SEE ALSO
.BR tc (8),