On Tuesday 11 February 2003 17:57, Nelson Guedes Paulo Junior wrote:
> Hi all,
>
> I couldn't figure, in the following command, whats the meaning of the
> flowid.
>
> tc filter add dev eth0 parent ffff: protocol ip prio 50 u32 match ip /
> src 0.0.0.0/0 police rate 38kbit burst 38kbit drop flowid :1
>
> :1 means what??
It means that's going to redirect all traffic to class ffff:1 (flowid =
classid). But ingress is classless. So the there is no real class ffff:1.
But you have to redirect the traffic to something. Actually, the ingress
qdisc is a dummy qdisc. The only thing you can do with it is add filters.
> There's some way to create other classes like the egress has?
No.
> For example, I coulde use this:
>
> tc qdisc add dev eth0 root handle 1: prio
> tc qdisc add dev eth0 parent 1:1 handle 10: sfq perturb 10
> tc qdisc add dev eth0 parent 1:2 handle 20: sfq perturb 10
> tc qdisc add dev eth0 parent 1:3 handle 30: sfq perturb 10
>
> And create a prio qdisc with 3 qdiscs inside.
>
> There's some way to do that with a ingress filter???
No.
Long answer : yes. You can use the imq device. If you patch the kernel and
iptables, you can make a virutal imq device and redirect all incoming traffic
to it. You can add egress qdisc to the imq device.
Stef
--
stef.coene@docum.org
"Using Linux as bandwidth manager"
http://www.docum.org/
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