[ovs-discuss] QoS problems with ovs , max-rate scale not correct

[楊青樺]

Hi all,

I'm trying to get speed limit for specific port in the mininet using ovs
and ryu controller.

but I got some problems:

ovs-vsctl -- set Port s1-eth1 qos=@newqos -- \
--id=@newqos create QoS type=linux-htb other-config:max-rate=1000000

1. while setting max-rate=1000000(1000K), it should be 1Mb/s, but I got
1Gb/s

2. decrease the max-rate from 1000K to 200K the proportion are
strange(1000K->1Gb/s, 600K-> 600Mb/s , 200K-> 16Mb/s).

3. if initial creating topo with bw setting , the ovs-vsctl set port
doesn't change anything in tc.


Here are some experiment details in this doc:
https://docs.google.com/presentation/d/1iSCmkKWkMFwiDDhzQhM_6cMyQ5NV30vVIRphlU76iKs/edit?usp=sharing


--- orders I have run ----

*mininet *:sudo mn --controller remote --link tc

*s1*:  ovs-vsctl set Bridge s1 protocols=OpenFlow13

ovs-vsctl -- set Port s1-eth1 qos=@newqos -- \
--id=@newqos create QoS type=linux-htb other-config:max-rate=1000000

*c0*:  ryu-manager ryu.app.simple_switch_13

test bandwidth:
iperf h1 h2


==here is my enviorment==

VM ubuntu 14.04 LTS


$ovs-vsctl -V

ovs-vsctl (Open vSwitch) 2.5.1

Compiled Nov  3 2016 16:01:32

DB Schema 7.12.1

mn --version

2.2.1

ryu-manager --version
ryu-manager 4.7
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