Hi
1)
You can use rx_bytes and tx_bytes to calculate average traffic load
for example : *(current rx - previous rx) / delta time*
2)
Just send OFPT_ROLE_REQUEST to switch and let switch know which controller
is slave, master or equal.
For example :
https://github.com/TakeshiTseng/SDN-Work/blob/master/MultiControl/ModStatusApp.py
The other example is let two connect each other by using socket, while
master controller dead, slave controller will send role request and change
to master.
https://github.com/TakeshiTseng/SDN-Work/tree/master/MultiControl/ms
Yi
2015-05-09 6:46 GMT+08:00 mehran shetabi <[email protected]>:
> 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?
>
> Hi
>
> 1. If "load" you mentioned is "traffic load", you can send
> ofp_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
>
> 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
>
>
> Yi
>
>
> 2015-05-08 10:30 GMT+08:00 FUJITA Tomonori <
> [email protected]>:
>
>> Please don't drop the mailing list,
>>
>> On Thu, 07 May 2015 22:46:20 +0430
>> "mehran shetabi" < [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
>>
>> 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
> -----
>
>
--
-----
Yi Tseng (a.k.a Takeshi)
Taiwan National Chiao Tung University
Department of Computer Science
W2CNLab
-----
------------------------------------------------------------------------------
One dashboard for servers and applications across Physical-Virtual-Cloud
Widest out-of-the-box monitoring support with 50+ applications
Performance metrics, stats and reports that give you Actionable Insights
Deep dive visibility with transaction tracing using APM Insight.
http://ad.doubleclick.net/ddm/clk/290420510;117567292;y
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