Hi,All
I use HTB to control traffic.Here is my script:
/usr/sbin/tc qdisc del dev nas0 root
/usr/sbin/tc qdisc add dev nas0 root handle 1:0 htb default 60
/usr/sbin/tc class add dev nas0 parent 1:0 classid 1:1 htb ceil 896kbit rate
896kbit prio 0 burst 60k
/usr/sbin/tc class add dev nas0 parent 1:1 classid 1:10 htb ceil 896kbit rate
537kbit prio 1 burst 60k
/usr/sbin/tc class add dev nas0 parent 1:1 classid 1:20 htb ceil 361kbit rate
161kbit prio 2 burst 60k
/usr/sbin/tc class add dev nas0 parent 1:1 classid 1:30 htb ceil 298kbit rate
98kbit prio 3 burst 60k
/usr/sbin/tc class add dev nas0 parent 1:1 classid 1:40 htb ceil 271kbit rate
71kbit prio 4 burst 60k
/usr/sbin/tc class add dev nas0 parent 1:1 classid 1:50 htb ceil 117kbit rate
17kbit prio 5 burst 60k
/usr/sbin/tc class add dev nas0 parent 1:1 classid 1:60 htb ceil 212kbit rate
12kbit prio 6 burst 60k
#### Attach SFQ to each class #####
/usr/sbin/tc qdisc add dev nas0 parent 1:10 handle 10: sfq perturb 10
/usr/sbin/tc qdisc add dev nas0 parent 1:20 handle 20: sfq perturb 10
/usr/sbin/tc qdisc add dev nas0 parent 1:30 handle 30: sfq perturb 10
/usr/sbin/tc qdisc add dev nas0 parent 1:40 handle 40: sfq perturb 10
/usr/sbin/tc qdisc add dev nas0 parent 1:50 handle 50: sfq perturb 10
/usr/sbin/tc qdisc add dev nas0 parent 1:60 handle 60: sfq perturb 10
######Filters#########
/usr/sbin/tc filter add dev nas0 parent 1:0 protocol ip prio 1 u32 match ip
sport 20 0xffff flowid 1:10
/usr/sbin/tc filter add dev nas0 parent 1:0 protocol ip prio 1 u32 match ip
dport 20 0xffff flowid 1:10
/usr/sbin/tc filter add dev nas0 parent 1:0 protocol ip prio 3 u32 match ip
sport 8000 0xffff flowid 1:30
/usr/sbin/tc filter add dev nas0 parent 1:0 protocol ip prio 3 u32 match ip
dport 8000 0xffff flowid 1:30
Then,I use "ftp 21" and "ftp 8001" to test this
script,which according to class 1:10 and class 1:30.I found that the class 1:30
will get more bandwidth than class 1:10.I got confused!You know,class can borrow
more available bandwidth.But I don't know why the low priority (1:30) can borrow
more bandwidth than high priority(1:10)?
Would anyone like to tell me how HTB caculate borrowed bandwidth?
Any suggestion will be highly appreciated!
Best Regards
swcims
swcims@163.com
2004-07-30