[LARTC] cascaded HTB urgent question

[Osama Abu Elsorour <osama@wayout.net>]

Hi there,
I have a question with regards to cascading multiple HTB qdiscs. Assume
that I want to build the following hierarchy:

(qdisc htb 1:0) -> (class htb 1:1) -> (qdisc htb 2:0) -> (class htb 2:1)
						      -> (class htb 2:2)

I want to attache aggregate u32 filters at 1:0 for supernets, then at
2:0 (and 3:0, 4:0, etc), I attach the more specific u32 filters for say
HTTP and SMPT shaping.

so I attach the following filters:
tc filter add dev eth0 parent 1:0 protocol ip u32 match ip dst
	172.16.1.0/24 classid 1:1
so that all the class c traffic is directed to 1:1
then for that c class web traffic
tc filter add dev eth0 parent 2:0 protocol ip u32 match ip sport 80
	0xffff classid 2:1
then for that c class smtp traffic
tc filter add dev eth0 parent 2:0 protocol ip u32 match ip sport 25
	0xffff classid 2:2
and so on and so forth

however, when I build that setup, the c class traffic gets directed to
1:1 alright, but nothing goes nay further in 2:1 and 2:2

my reasoning could be one of the following:
1) you cannot cascade HTB qdiscs, which to me is illogical, it defies
the concept and adventages of having a hierarchical setup.
2) there is something wrong with the way I attached the filters.
3) I totally misunderstood HTB!

Please advise.

Thanks a million.



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