Hi all, Its a while we are trying to use "tc" for bandwidth control. But each time we apply tc rules to the network, we experience a lot of service degradation. The usage we are mostly concerned about, is bandwidth control of a group of IP addresses. We mark that subnet with IPChains and then apply the tc rules. These are the rules applied to eth5 in order to limit the uplink of packets marked "7" by ipchains: # /sbin/tc class sh dev eth5 class cbq 40: root rate 100Mbit (bounded,isolated) prio no-transmit class cbq 40:1 parent 40: rate 100Mbit prio no-transmit class cbq 40:300 parent 40:1 leaf 8025: rate 200Kbit (bounded) prio 5 # /sbin/tc qdisc sh dev eth5 qdisc tbf 8025: rate 200Kbit burst 25Kb lat 1us qdisc cbq 40: rate 100Mbit (bounded,isolated) prio no-transmit [root@xxxxx naimi]# /sbin/tc filter sh dev eth5 filter parent 40: protocol ip pref 1 fw filter parent 40: protocol ip pref 1 fw handle 0x7 classid 40:300 filter parent 40: protocol ip pref 80 u32 filter parent 40: protocol ip pref 80 u32 fh 800: ht divisor 1 filter parent 40: protocol ip pref 80 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid 40:100 As I mentioned, the service degraded severely: pig time of internet sites increased about 300-500 ms!! Does anybody know what is wrong with my configuration? Best Regards Hoomaan Naimi Afranet Network Administrator
