Packet Dropped by HTB qdisc

Linux Advanced Routing and Traffic Control

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Hi,

	 "tc -s qdisc show dev eth0"     shows

 qdisc htb 1: r2q 10 default 256 direct_packets_stat 48
 Sent 687354936 bytes 4858561 pkts (dropped 8809, overlimits 4909679)
 backlog 142p

	 and  "tc -s qdisc show dev eth2"     shows
 qdisc htb 3: r2q 10 default 256 direct_packets_stat 37
 Sent 2697417450 bytes 5417551 pkts (dropped 58103, overlimits 5691061)
 backlog 1464p

It seems that the root qdisc is dropping packets. Can anyone please tell why 
the packets are being dropped? And how can I avoide them.  
I'm using 3com and intel pro 1000 lan cards connected to cisco 2900 switch at 
100 Full Duplex.

Are the packets being dropped at class/leaf level or at the main qdisc? 
And is there anyway to know which packets are being dropped by HTB? It will be 
really helpful to me if htb shows the detailed statistics of all the dropped 
packets.


with regards,
Bikrant






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