[LARTC] exploring HTB

["Sumit Pandya" <sumit@elitecore.com>]

Hi All,
	I have few queries in reference of HTB manuals on link
http://luxik.cdi.cz/~devik/qos/htb/htbman.htm.

1> Is "default" is must while attaching queue discipline HTB to device?
	My observation for above question is, when I do following 4 command then I’
m able to reach to all hosts on eth1. But if I remove "default 12" from
second command then I cannot reach to hosts on eth1, but I can reach to the
host on other device (eth0, eth2). This occurs after I create extra class to
serve as the root (i.e. creating class having parent 1:1, 4th command)
tc qdisc del dev eth1 root
tc qdisc add dev eth1 root handle 1: htb default 12
tc class add dev eth1 parent 1: classid 1:1 htb rate 100kbps ceil 100kbps
burst 2k
tc class add dev eth1 parent 1:1 classid 1:11 htb rate 10kbps ceil 100kbps
burst 2k
tc class add dev eth1 parent 1:1 classid 1:12 htb rate 60kbps ceil 100kbps
burst 2k

	Ya, this reachability can be restored only after delition of root class,
i.e. classid 1:1. I'm taking this as a feature but is it a bug?

2> Manual states that "... ... ... Now we can optionally attach queuing
disciplines to the leaf classes... ... ... tc qdisc add dev eth0 parent 1:10
handle 20: pfifo limit 5... ... ...". If I not going to do that still I'm
fine with my rule set, as written "optional". Then is there benefit or
payoff against this leaf-class?

3> A Small but nice document about Cross device sharing on link
http://luxik.cdi.cz/~devik/qos/htb/htbmeas1.htm. Can’t this limitation of
slot be increased?

4> It would be nice if someone help me by providing statistics over number
of queues and filter. What is maximum limit of these two for a PIII 700 with
256 MB RAM? How much maximum bandwidth can be shaped?

Thanks in Advance.
-- Sumit

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