Hi Carlos,
Of course, Yes. But it is depending on your application implementation.
To retrieve the port statistics related to the bandwidth, you can use the
OFPPortStats
request/reply messages in your Ryu app.
http://ryu.readthedocs.io/en/latest/ofproto_v1_3_ref.html#ryu.ofproto.ofproto_v1_3_parser.OFPPortStatsRequest
The following page on Ryu-Book show an example to monitor the port statistics
using these
messages, so you can implement your own reactions (e.g., if the congestion
occur, then
install another flow entry) on your application.
http://osrg.github.io/ryu-book/en/html/traffic_monitor.html
Thanks,
Iwase
On 2017年11月24日 23:06, Jose Carlos Ferreira de Melo Junior wrote:
Hi thank you for the answer,
But suposely, could I retrieve the switch or port features that has the rate of bandwidth and apply
some rules regarding this bandwidth ???
does it work like that?
thanks in advance
2017-11-24 3:41 GMT-03:00 Iwase Yusuke <iwase.yusu...@gmail.com
<mailto:iwase.yusu...@gmail.com>>:
Hi Carlos,
The OpenFlow Spec does not directly provide the mechanism for the
multi-path load balancing and
also Ryu does not provide it.
I guess it is depending on your application design...
But for the beginning, how about using the Group action(the "select" type)?
The selection algorithm is depending on your switch though, it provides an
easy way to do load
balancing.
Please refer to the section "5.6.1 Group Types" in the OpenFlow Spec 1.3.5
for the details:
https://www.opennetworking.org/wp-content/uploads/2014/10/openflow-switch-v1.3.5.pdf
<https://www.opennetworking.org/wp-content/uploads/2014/10/openflow-switch-v1.3.5.pdf>
Thanks,
Iwase
On 2017年11月22日 06:13, Jose Carlos Ferreira de Melo Junior wrote:
Hi guys
I'm new here so I'm not quite sure how this mailing list works...but
it' ok
jumping right on the problem
I'm doing an experiment where I have a simple ring topology on mininet
Imagem inline 1
and What I'm trying to do is just a load balancer using openflow on Ryu.
As i'm using a ring topology I'm working over a simple_switch_stp_13.py
to prevent from any
loop.
The situation that I'm trying to do is if the link between h2 and h1 is
overloaded h2 send
the traffic to another way going through s3 to reach h1
So first I would like to know if it is possible to make a load balancer
like I described
without using a rest_qos.py? And how could I start?
--
Best Regards,
José Carlos Ferreira
Msc student Computer Science
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Atenciosamente,
José Carlos Ferreira
Mestrando em Ciência da Computação
Analista de Redes e Sistemas PoP-PE/RNP
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