can anyone tell me how to mark packet's DSCP value using tc?
Hi,
You can use the dsmark qdisc. Something like (example):
tc qdisc add dev $DEV handle 1:0 root dsmark indices 64 set_tc_index (...) tc class change $DEV parent 1:0 classid 1:1 dsmark 0x3 value 0xb8 # EF (...) tc filter add dev $DEV parent 1:0 prio 4 u32 ip dst y.y.y.y classid 1:1
This way, packets going to y.y.y.y get EF mark.
Iproute2 packages comes with some examples. The "Differentiated Services on Linux" draft by Almesberger, Jamal and Alexey Kuznetsov is another good source, including commented and easy to understand examples.
Regards, Joana Urbano
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