показать / изменить настройки управления трафиком (show / manipulate traffic control settings)
Q-события (Qevents)
Qdiscs may invoke user-configured actions when certain
interesting events take place in the qdisc. Each qevent can
either be unused, or can have a block attached to it. To this
block are then attached filters using the "tc block BLOCK_IDX"
syntax. The block is executed when the qevent associated with the
attachment point takes place. For example, packet could be
dropped, or delayed, etc., depending on the qdisc and the qevent
in question.
For example:
tc qdisc add dev eth0 root handle 1: red limit 500K avpkt
1K \
qevent early_drop block 10
tc filter add block 10 matchall action mirred egress
mirror dev eth1
