Andy Furniss wrote:
Oliver Hookins wrote:
Hi,
I'm trying to perform some (what I consider) basic traffic shaping on
our network utilising HTB. I have mostly reused the example on the
lartc.org site:
tc qdisc add dev eth0 root handle 1: htb default 10
tc class add dev eth0 parent 1: classid 1:1 htb rate 100mbit burst 24k
tc class add dev eth0 parent 1:1 classid 1:10 htb rate 50mbit ceil
80mbit burst 19k
burst 19k will limit you unless your HZ=1000
Our HZ is 512.
tc class add dev eth0 parent 1:1 classid 1:20 htb rate 1mbit ceil
1mbit
tc qdisc add dev eth0 parent 1:10 handle 10: sfq perturb 10
tc qdisc add dev eth0 parent 1:20 handle 20: sfq perturb 10
tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip src
X.X.X.X flowid 1:20
So we have a total of 100mbit to be used, the default class 1:10 gets
50mbit and a ceiling of 80mbit whereas my test host X.X.X.X gets only
1mbit in any situation. Some rate limiting is definitely happening,
but I am finding the outbound traffic is limited to 2mbit instead of
1mbit. If I change the rate (to say 10mbit) the outbound traffic gets
up to again twice the rate (in this case 20mbit).
Not sure can you show output of tc -s -d class ls dev eth0 while it's
running at 2x speed.
class htb 1:1 root rate 100Mbit ceil 100Mbit burst 24Kb/8 mpu 0b cburst
132644b/8 mpu 0b level 7
Sent 741267447736 bytes 735629628 pkts (dropped 0, overlimits 0)
rate 4316188bps 22688pps
lended: 489885589 borrowed: 0 giants: 0
tokens: -78 ctokens: 6677
class htb 1:10 parent 1:1 leaf 10: prio 0 quantum 200000 rate 50Mbit
ceil 80Mbit burst 19Kb/8 mpu 0b cburst 106440b/8 mpu 0b level 0
Sent 740240463634 bytes 734522966 pkts (dropped 429910165, overlimits 0)
rate 4233957bps 22358pps
lended: 244988819 borrowed: 489885528 giants: 0
tokens: -293 ctokens: 6636
class htb 1:20 parent 1:1 leaf 20: prio 0 quantum 13107 rate 1Mbit ceil
1Mbit burst 2Kb/8 mpu 0b cburst 2Kb/8 mpu 0b level 0
Sent 755354078 bytes 755048 pkts (dropped 0, overlimits 0)
rate 84198bps 321pps backlog 4p
lended: 755220 borrowed: 61 giants: 0
tokens: -21517 ctokens: -21517
--
Regards,
Oliver Hookins
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