NAME

       gact - generic action

SYNOPSIS

       tc ... action gact CONTROL [ RAND ] [ INDEX ]
       CONTROL := { reclassify | drop | continue | pass | pipe |
               goto chain CHAIN_INDEX |
               jump JUMP_COUNT }

       RAND := random RANDTYPE CONTROL VAL
       RANDTYPE := { netrand | determ }
       VAL := number not exceeding 10000
       JUMP_COUNT := absolute jump from start of action list
       INDEX := index value used

DESCRIPTION

       The gact action allows reclassify, dropping, passing, or accepting packets.  At the moment there are only
       two algorithms. One is deterministic and the other uses internal kernel netrand.

OPTIONS

       random RANDTYPE CONTROL VAL
              The probability of taking the action expressed in terms of 1 out of VAL packets.

       CONTROL
              Indicate  how  tc should proceed if the packet matches.  For a description of the possible CONTROL
              values, see tc-actions(8).

EXAMPLES

       Apply a rule on ingress to drop packets from a given source address.
              # tc filter add dev eth0 parent ffff: protocol ip prio 6 u32 match ip src 10.0.0.9/32 flowid 1:16 action drop

       Allow 1 out 10 packets from source randomly using the netrand generator
              # tc filter add dev eth0 parent ffff: protocol ip prio 6 u32 match ip src 10.0.0.9/32 flowid 1:16 action drop random netrand ok 10

       Deterministically accept every second packet
              # tc filter add dev eth0 parent ffff: protocol ip prio 6 u32 match ip src 10.0.0.9/32 flowid 1:16 action drop random determ ok 2

SEE ALSO

       tc(8), tc-actions(8), tc-u32(8)

iproute2                                           11 Jan 2023                          Generic actions in tc(8)