Re: [LARTC] why the bandwidth is not follow my config??????

[Stef Coene <stafke@iname.com>]

I just did the tests and these are my results : (I use ttcp to test)
for class 20:1 = 71.90 KB/sec (575.2Kbit/sec)
for class 20:2 = 134.05 KB/sec (1072.4Kbit/s)

The numbers are not correct, but I think it's just CBQ that's not very
accurate when you use the bounded paramter.  I got the same results when
I use everywhere prio8 and put class 20:2 on qdisc 20:0.  So it's a CBQ
accuracy problem.


-- 

Staf

More QOS info : http://users.belgacom.net/staf/


> Juergen wrote:
> 
> I try to use iproute to control my bandwidth less than 3MB, but
> something happen.
> list below is my config
> ----------------------------------------------------------------------
> tc qdisc add dev eth1 root handle 20: cbq bandwidth 10Mbit avpkt 1000
> 
> tc class add dev eth1 parent 20:0 classid 20:1 cbq bandwidth 10Mbit
> rate \
> 1Mbit allot 1514 weight 100Kbit prio 8 maxburst 20 avpkt 1000 bounded
> 
> tc class add dev eth1 parent 20:1 classid 20:2 cbq bandwidth 10Mbit
> rate \
> 3Mbit allot 1514 weight 200Kbit prio 5 maxburst 20 avpkt 1000 bounded
> 
> tc filter add dev eth1 parent 20:0 protocol ip prio 100 u32 match ip
> src \
> 192.168.0.1 flowid 20:1
> 
> tc filter add dev eth1 parent 20:0 protocol ip prio 25 u32 match ip
> src \
> 192.168.0.2 flowid 20:2
> ----------------------------------------------------------------------
> I use download file to test this function.
> But the really situation about the bandwidth is ...
> 1MB(20:1) is 1.5Mbit
> 3MB(20:2)is 4.6Mbit
> Have anyone met this kind of problem before?????
> And how to solve this problem?????

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