[LARTC] qdisc unbounding question

["Andy Pyles" <apyles@telverse.com>]

Hello,

I'm trying to setup a linux box as follows:



  <---- 170kbs                        170kbs ------------>
	  if Dest. = 10.10.20.97        if Dest. = 10.10.30.3
	  (classid=170)                 (classid=171)

			|------|     |------
			| eth0 |     |eth1  |
			|      |-----|      |
			--------     -------
  <------30kbs                       30kbs --------------->
	  if Dest. = 10.10.20.95        if Dest. = 10.10.30.2 
        (classid=30)			  (classid=31)

Brief synopsis:

basically what I have outlined above works fine. The problem that I'm
having is
when I'm NOT experiencing any traffic on #170, then #30 is NOT able to
inherit any excess bandwidth.
Any ideas where to start?

Also, what I'm trying to do here, is intentionally throttle down the the
total bandwidth to 200kbs. 

Anyone have any pointers here?



Here is what I have below:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

tc qdisc add dev eth0 root handle 1:0 cbq bandwidth 200Kbit avpkt 1000
cell 8
tc class add dev eth0 parent 1:0 classid 1:1 cbq bandwidth 200Kbit rate
200Kbit weight 20Kbit prio 8 allot 1514 cell 8 maxburst 20 avpkt 1000

tc qdisc add dev eth1 root handle 1:0 cbq bandwidth 200Kbit avpkt 1000
cell 8
tc class add dev eth1 parent 1:0 classid 1:1 cbq bandwidth 200Kbit rate
200Kbit weight 20Kbit prio 8 allot 1514 cell 8 maxburst 20 avpkt 1000

tc class add dev eth0 parent 1:1 classid 1:170 cbq bandwidth 200Kbit
rate 170Kbit weight 17Kbit prio 5 allot 1514 cell 8 maxburst 20 avpkt
1000
tc qdisc add dev eth0 parent 1:170 tbf rate 170Kbit buffer 10Kb/8 limit
15Kb mtu 1500
tc filter add dev eth0 parent 1:0 protocol ip prio 100 u32 match ip dst
10.10.20.97 flowid 1:170

tc class add dev eth1 parent 1:1 classid 1:171 cbq bandwidth 200Kbit
rate 170Kbit weight 17Kbit prio 5 allot 1514 cell 8 maxburst 20 avpkt
1000
tc qdisc add dev eth1 parent 1:171 tbf rate 170Kbit buffer 10Kb/8 limit
15Kb mtu 1500
tc filter add dev eth1 parent 1:0 protocol ip prio 100 u32 match ip dst
10.10.30.3 flowid 1:171

tc class add dev eth0 parent 1:170 classid 1:30 cbq bandwidth 200Kbit
rate 30Kbit weight 3Kbit prio 6 allot 1514 cell 8 maxburst 20 avpkt 1000
tc qdisc add dev eth0 parent 1:30 tbf rate 30Kbit buffer 10Kb/8 limit
15Kb mtu 1500
tc filter add dev eth0 parent 1:0 protocol ip prio 100 u32 match ip dst
10.10.20.95 flowid 1:30

tc class add dev eth1 parent 1:171 classid 1:31 cbq bandwidth 200Kbit
rate 30Kbit weight 3Kbit prio 6 allot 1514 cell 8 maxburst 20 avpkt 1000
tc qdisc add dev eth1 parent 1:31 tbf rate 30Kbit buffer 10Kb/8 limit
15Kb mtu 1500
tc filter add dev eth1 parent 1:0 protocol ip prio 100 u32 match ip dst
10.10.30.2 flowid 1:31



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