Manpages - tc-route.8

route - route traffic control filter

tc filter … route [ from REALM | fromif TAG ] [ to REALM ] [ classid CLASSID ] [ action ACTION_SPEC ]

Match packets based on routing table entries. This filter centers around the possibility to assign a realm to routing table entries. For any packet to be classified by this filter, a routing table lookup is performed and the returned realm is used to decide on whether the packet is a match or not.

*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.

(no term)

*from*/ REALM/
fromif*/ TAG/ :: Perform source route lookups. TAG is the name of an interface which must be present on the system at the time of *tc invocation.

*to*/ REALM/

Match if normal (i.e., destination) routing returns the given REALM.

Consider the subnet 192.168.2.0/24 being attached to eth0:

    ip route add 192.168.2.0/24 dev eth0 realm 2

The following route filter will then match packets from that subnet:

    tc filter add ... route from 2 classid 1:2

and pass packets on to class 1:2.

Due to implementation details, realm values must be in a range from 0 to 255, inclusive. Alternatively, a verbose name defined in /etc/iproute2/rt_realms may be given instead.

*tc*(8), *ip-route*(8)