Hi,
I mean that how can i measure the instant traffic load of any host that
connected to OVS?
I know that there is ofp_event.EventOFPPortStatsReply in Ryu documentation,
but it measures the cumulative load of a port (rx_packets, rx_bytes,
tx_packets, tx_bytes, …) in a switch that connected to the host. How can i
use these information to calculate the instant traffic load of a host?
Also, how can I implement master, slave, and equal controllers for a switch
in Mininet and program them with the Ryu which they control the switch to
act (for example) like a simple_switch_13?
Thank you,
...................................................
mehran shetabi
PhD student
Computer Engineering Department
IUST
-----Original Message-----
From: Yi Tseng <[email protected]>
To: FUJITA Tomonori <[email protected]>
Cc: mehran shetabi <[email protected]>, ryu-devel
<[email protected]>
Date: Fri, 8 May 2015 16:31:11 +0800
Subject: Re: [Ryu-devel] Would you please answer these questions?
Hi1. If "load" you mentioned is "traffic load", you can
sendofp_port_stats_request (openflow 1.3.4 spec, page 94) and calculate port
loading by port stats information.
2. If you mean "controller loading", just use other library like psutil
https://github.com/giampaolo/psutil [https://github.com/giampaolo/psutil]3.
You need to implement your communication protocol between controllers, for
example: use tcp socket connection.
BTW, mininet supports multiple controller, just assign two remote
controller, for example:
https://github.com/TakeshiTseng/SDN-Work/blob/master/mininet/single/two_controller.py
[https://github.com/TakeshiTseng/SDN-Work/blob/master/mininet/single/two_controller.py]
Yi
2015-05-08 10:30 GMT+08:00 FUJITA Tomonori <[email protected]
[mailto:[email protected]]>:
Please don't drop the mailing list,
On Thu, 07 May 2015 22:46:20 +0430
"mehran shetabi" <[email protected] [mailto:[email protected]]> wrote:
> I mean that is there any class, method, command, library, or event
manager
> in Ryu documentation for measuring instant load of any host that
connected
> to OVS, and instant load of a controller?
There isn't.
> I know that there is ofp_event.EventOFPPortStatsReply in Ryu
documentation,
> but it measures the cumulative load of a port (rx_packets, rx_bytes,
> tx_packets, tx_bytes, …) in a switch that connected to the host, but
not
> to the controller.
>
> Also, how can I implement master, slave, and equal controllers for a
switch
> in Mininet and program them with the Ryu which they control the switch
for
> acting like a simple_switch_13, for example?
Try OFPRoleRequests:
http://ryu.readthedocs.org/en/latest/ofproto_v1_3_ref.html#role-request-message
[http://ryu.readthedocs.org/en/latest/ofproto_v1_3_ref.html#role-request-message]
I don't know if mininet supports multiple controllers though.
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--
-----Yi Tseng (a.k.a Takeshi)
Taiwan National Chiao Tung University
Department of Computer Science
W2CNLab
-----
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