Re: [LARTC] IMQ & HTB problem

[Patrick McHardy <kaber@trash.net>]

Hi !

Alin Nastac wrote:
> Hi everybody,
> 
> I have a strange problem. I recently found IMQ dummy device and I was 
> anxious to test this on my router. I have the following configuration:
> 
> iptables -t mangle -A PREROUTING -i eth0 -m mark --mark 0 -d $MY_NET -j 
> IMQ --todev 0
> iptables -t mangle -A POSTROUTING -o eth0 -m mark --mark 0 -s $MY_NET -j 
> IMQ --todev 1
> 
> insmod imq
> 
> tc qdisc add dev imq0 root handle 1: htb default fff
> tc qdisc add dev imq1 root handle 1: htb default fff
> 
> tc class add dev imq0 parent 1:0 classid 1:1 htb rate 192Kbit
> ...
> 
> tc filter add dev imq0 parent 1:0 protocol ip prio 100 u32 match ip src...
> bla bla bla
> 
> ip link set imq0 up; ip link set imq1 up
> 
> The problem is that when I run this script, those packets that are 
> routed via imq* (0 for in and 1 for out) are slowed down to ridiculous 
> speeds (1kbit or less for a 64kbit class for eg.)

In fact, packets aren't routed via imq but only enqueued/dequeued to the 
attached qdiscs. Please post your entire script because the error is 
most probably in there..

> I read about some bugs that lies in IMQ code but I also read about 
> crashes related to this bugs and this is not my case.

Glad to here that, although the bug is still present .. i haven't found 
the time to debug it but i'll probably get to it this week.

Bye,
Patrick




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