Linux cli command tc-route

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NAME 🖥️ tc-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 verbose name defined in /etc/iproute2/rt_realms may be given instead.

SEE ALSO

tc(8), ip-route(8)

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