Hi, I guess I'll answer my own question myself. I was on a wireless interface, so the difference seems to have been due to physical layer overhead. I switched to wire and did not notice any difference, regards David Blomberg > Hello, > > I use rrdtool to graph the traffic in the different classes on an > interface, eth1. Basically, I use the output from > > tc -s qdisc ls dev eth1 > > my tc script (which is only for testing the graphing) looks like this: > > /sbin/tc qdisc add dev eth1 root handle 1: htb default 20 r2q 1 > /sbin/tc class add dev eth1 parent 1: classid 1:1 htb rate 200kbit burst > 15k > > /sbin/tc class add dev eth1 parent 1:1 classid 1:10 htb rate 100kbit ceil > 200kbit burst 15k > /sbin/tc class add dev eth1 parent 1:1 classid 1:20 htb rate 50kbit ceil > 200kbit burst 15k > /sbin/tc class add dev eth1 parent 1:1 classid 1:30 htb rate 50kbit ceil > 200kbit burst 15k > > /sbin/tc qdisc add dev eth1 parent 1:10 handle 10: sfq perturb 10 > /sbin/tc qdisc add dev eth1 parent 1:20 handle 20: sfq perturb 10 > /sbin/tc qdisc add dev eth1 parent 1:30 handle 30: sfq perturb 10 > > /sbin/iptables -F > /sbin/iptables -A OUTPUT -t mangle -o eth1 -j MARK --set-mark 1 > > /sbin/tc filter add dev eth1 protocol ip parent 1:0 prio 1 handle 1 fw > flowid 1:10 > # Filter arp packets to class 1:30. > /sbin/tc filter add dev eth1 protocol arp u32 match u32 0 0 flowid 1:30 > > When I with the help of snmp, I also graph the rate of packets going out > on the interface. My problem is that the rate I get from snmp is not the > same as the rate I get from the root class of my queue. In both cases, the > rate is calculated by rrdtool, I submit the number of bytes that have been > transmitted. Shouldn't the rate of packets leaving the root class be the > same as the rate given by snmp? > > Thank you for the help, > > regards, > > David Blomberg _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
