Hi Everyone,

This is a simple question but I don't understand why the below tbf is not 
working as expected by throttling traffic to 5kbps

If I throttle a PC's traffic using the below when traffic exceeds 5kbps 
packets start getting dropped (as they should) but all traffic gets dropped. 
not just the bit over 5kbps.

TC="tc add dev ppp0"
$TC parent 8001:2 handle 2: tbf rate 5kbps latency 50ms burst 1540

I can see the "dropped" counter increasing, the overlimits counter stays the 
same and there is a "backlog" counter with 21p or similar each time which 
also stays the same. To get traffic working again I have to delete the qdisc 
and add it again.

What am I doing wrong ?

This is a Kubuntu machine running 2.6.14 kernel, the tbf is a leaf qdisc for a 
WRR class. 

Thanks in Advance
Lee

p.s. if anyone can explain what the backlog is, I can't find it in the docco.
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