[LARTC] What are the proper values for rate/ceil in tc ?

[LARTC] What are the proper values for rate/ceil in tc ?

[Gheorghe Marinca]

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Hello!
I am using shapping whith htb. My question is what are the propper values I can use in rate/ceil. I use htb.init for quick building of my classes/rules and have 2 groups of clients with 2 different bandwidth assignemet :
  A. 16--->48kbps
  B. 16---->128Kbps
It seems to work everything OK, but can I use lower values for rate like 8Kbps ? What about using 32-->96Kbps? I let htb to compute quantum, I just set R2Q. 

I also get the following error:
itr kernel: HTB: quantum of class 10002 is big. Consider r2q change.<4>HTB: quantum of class 10010 is big. Consider r2q change
Bellow is an exerpt from my coniguration(as produced by htb.init script):

tc qdisc del dev eth1 root
tc qdisc add dev eth1 root handle 1 htb default 99 r2q 1
tc qdisc del dev eth2 root
tc qdisc add dev eth2 root handle 1 htb default 99 r2q 1

tc class add dev eth1 parent 1: classid 1:2 htb rate 10Mbit
tc class add dev eth1 parent 1:2 classid 1:20 htb rate 768kbit ceil 796kbit
tc class add dev eth1 parent 1:20 classid 1:30 htb rate 612kbit ceil 712kbit
.....
tc class add dev eth1 parent 1:20 classid 1:40 htb rate 156kbit ceil 224kbit


.....
tc class add dev eth2 parent 1:30 classid 1:1099 htb rate 16Kbit ceil 128Kbit
tc qdisc add dev eth2 parent 1:1099 handle 1099 sfq perturb 10
tc filter add dev eth2 parent 1:0 protocol ip prio 100 u32 match ip src xx.xx.xx.xx classid 1:1099

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