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Route classifier in tc(8)                               Linux                               Route classifier in tc(8)



NAME
       route - route traffic control filter

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

DESCRIPTION
       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.

OPTIONS
       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.

       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.

EXAMPLES
       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.

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

SEE ALSO
       tc(8), ip-route(8)



iproute2                                             21 Oct 2015                            Route classifier in tc(8)