Manpages - tc-matchall.8

matchall - traffic control filter that matches every packet

tc filter … matchall [ skip_sw | skip_hw ] [ action ACTION_SPEC ] [ classid CLASSID ]

The matchall filter allows to classify every packet that flows on the port and run a action on it.

*action*/ ACTION_SPEC/

Apply an action from the generic actions framework on matching packets.

*classid*/ CLASSID/

Push matching packets into the class identified by CLASSID.

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.

skip_hw

Do not process filter by hardware.

To create ingress mirroring from port eth1 to port eth2:

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

The first command creates an ingress qdisc with handle ffff: on device 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:

    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

The first command creates an egress qdisc with handle 1: that replaces the root qdisc on device 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:

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

*tc*(8),