"Route classifier in tc" 8 "21 Oct 2015" "iproute2" "Linux"
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" .TQ 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:
.EX
ip route add 192.168.2.0/24 dev eth0 realm 2
The following
route filter will then match packets from that subnet:
.EX
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 verbose
name defined in /etc/iproute2/rt_realms may be given instead.
SEE ALSO
tc (8), ip-route (8)
