Hi Jose
Please check the following links for more specific information,
https://github.com/dariobanfi/multipath-sdn-controller/tree/master/controller
http://csie.nqu.edu.tw/smallko/sdn/ryu_multipath_13.htm
http://www.muzixing.com/pages/2014/11/07/load-balancemultipath-application-on-ryu.html
If you have any specific question, please feel free to ask.
Best of luck :)
-Tanvir
________________________________
From: Jose Carlos Ferreira de Melo Junior <jc...@cin.ufpe.br>
Sent: Tuesday, 9 January 2018 11:21 PM
To: Ryu-devel
Cc: Ul Huque, Tanvir (Data61, Eveleigh ATP); iwase.yusu...@gmail.com
Subject: Re: [Ryu-devel] splitting a flow into a number of flows
Hi guys, I couldn't help but notice that you two are discussing about spliting
flows into two sub-flows refering to the ring topology showed here.
I would like to ask to Tanvir, in this ring topology you should had experienced
some kind of loop how you managed to solve this problem?
I was trying to do the same thing with the same topology using Dijkstra
Algorithm but there were a lot of broadcast messages in loop such as ARP , LLDP
and ICMPv6 all the time
2018-01-08 21:12 GMT-03:00 Iwase Yusuke
<iwase.yusu...@gmail.com<mailto:iwase.yusu...@gmail.com>>:
Hi Tanvir,
> To do round-robin, what I have to change the above code?
The OpenFlow Spec says the selection algorithm of SELECT type is depending on
the switch's implementation.
So whether switch will do round-robin or other selection algorithm (e.g., hash
of source MAC) is the outside of the OpenFlow and not controllable from Ryu
side...
Please refer to the docs of your OpenFlow switch.
Thanks,
Iwase
On 2017年12月28日 03:11,
tanvir.ulhu...@data61.csiro.au<mailto:tanvir.ulhu...@data61.csiro.au> wrote:
"weight" should be determined only when "OFPGT_SELECT" type.
What does "split" exactly mean?
To do round-robin or load-balance on two path, you should use "OFPGT_SELECT".
Thanks for your reply :) My response is given below,
________________ switch 3_____________
|
|
|
|
h1------switch 1
switch 4-------- h2
|_________________ switch 5___________|
For the above topology, I used the following code in which a flow is supposed
to be split into two equal sub-flows in Switch 1 (a flow entering into switch 1
will be divided equally to pass through switch 3 and switch 5). However, I have
found that because of using "ofproto.OFPGT_SELECT", the controller sends the
flow in one of the links between two links (either through switch 3 or switch
5). How can I divide a flow into two sub-flows passing through two links?
group_id = 1
action01 = [parser.OFPActionOutput(2)]
action02 = [parser.OFPActionOutput(4)]
weight01 = 50
weight02 = 50
watch_port = ofproto_v1_3.OFPP_ANY
watch_group = ofproto_v1_3.OFPQ_ALL
bucket01 = parser.OFPBucket(weight01, watch_port, watch_group,
action01)
bucket02 = parser.OFPBucket(weight02, watch_port, watch_group,
action02)
req = parser.OFPGroupMod(datapath, ofproto.OFPFC_ADD,
ofproto.OFPGT_SELECT, group_id=1, buckets=[bucket01, bucket02])
datapath.send_msg(req)
To do round-robin, what I have to change the above code?
Thanks,
-Tanvir
________________________________________
From: Iwase Yusuke <iwase.yusu...@gmail.com<mailto:iwase.yusu...@gmail.com>>
Sent: Monday, 25 December 2017 6:08 PM
To: Ul Huque, Tanvir (Data61, Eveleigh ATP)
Cc: ryu-devel@lists.sourceforge.net<mailto:ryu-devel@lists.sourceforge.net>
Subject: Re: [Ryu-devel] splitting a flow into a number of flows
Hi Tanvir,
> (1) How can I split a flow into multiple sub-flows defining the percentage
of
> each sub-flows compared to the flow?
"weight" should be determined only when "OFPGT_SELECT" type.
What does "split" exactly mean?
To do round-robin or load-balance on two path, you should use "OFPGT_SELECT".
> (2) I want to know the use, and application of OFPGT_INDRIECT, and OFPGT_FF.
For the details of each OFPGT_* types, please refer to "5.6.1 Group Types" on
the OpenFlow Spec 1.3.5.
Thanks,
Iwase
On 2017年12月21日 17:54,
tanvir.ulhu...@data61.csiro.au<mailto:tanvir.ulhu...@data61.csiro.au> wrote:
Hi
Thanks for your help.
I have used ".OFPGT_ALL" in ".OFPGroupMod" message, and found that the flow is
splitting. But there is a serious problem: if I set any value in "weight"
field, except 0, then the flow does not split into multiple sub-flows. I have
also noticed that if I set 0 in "weight" field, then the flow sends an equal
number of packets in each sub-flows and the number of packets of a sub-flow is
equivalent to the number of packets of the flow. I used the following code,
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
group_id = 1
action01 = [parser.OFPActionOutput(2)]
action02 = [parser.OFPActionOutput(4)]
weight01 = 0
weight02 = 0
watch_port = ofproto_v1_3.OFPP_ANY
watch_group = ofproto_v1_3.OFPQ_ALL
bucket01 = parser.OFPBucket(weight01, watch_port, watch_group,
action01)
bucket02 = parser.OFPBucket(weight02, watch_port, watch_group,
action02)
req = parser.OFPGroupMod(datapath, ofproto.OFPFC_ADD,
ofproto.OFPGT_ALL, group_id=1, buckets=[bucket01, bucket02]) # (2)
ofproto.OFPGT_SELECT --> ofproto.OFPGT_ALL
datapath.send_msg(req)
(1) How can I split a flow into multiple sub-flows defining the percentage of
each sub-flows compared to the flow?
(2) I want to know the use, and application of OFPGT_INDRIECT, and OFPGT_FF.
Thanks,
-Tanvir
________________________________________
From: Iwase Yusuke <iwase.yusu...@gmail.com<mailto:iwase.yusu...@gmail.com>>
Sent: Thursday, 21 December 2017 10:50 AM
To: Ul Huque, Tanvir (Data61, Eveleigh ATP)
Cc: ryu-devel@lists.sourceforge.net<mailto:ryu-devel@lists.sourceforge.net>
Subject: Re: [Ryu-devel] splitting a flow into a number of flows
Hi,
> buckets = [parser.OFPBucket(weight01, watch_port, watch_group,
> action01), parser.OFPBucket(weight02, watch_port, watch_group, action02)]
> req = parser.OFPGroupMod(datapath, ofproto.OFPFC_ADD,
> ofproto.OFPGT_SELECT, group_id, buckets)
How about using ofproto.OFPGT_ALL instead of ofproto.OFPGT_SELECT?
Please refer to "5.6.1 Group Types" on OpenFlow Spec 1.3.5 for the difference
between the types of group action.
Thanks,
Iwase
On 2017年12月19日 18:58,
tanvir.ulhu...@data61.csiro.au<mailto:tanvir.ulhu...@data61.csiro.au> wrote:
Hi
I want to split a flow into two flows, e.g., a flow entering into switch 1 will
be splitted into two flows going to switch 3 and switch 5.
________________ switch 3_____________
|
|
h1------switch 1
switch 4-------- h2
|_________________ switch 5____________|
Now, to split the flow I have used the following code, however, I have found
that flow is not splitting and passing through only one link without sending any
packets in other link.
1. Could you please help me identifying the problem?
2. Could you please share necessary resources/links/guidelines of load sharing
in SDN using RYU so that I can have workable implementation?
#....................................................... send_group_mod
.....................................................
# applicable in Swicth-1 (shared switch/AP)
def group_mod01(self, datapath):
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
group_id = 1
action01 = [parser.OFPActionOutput(2)] # for switch 3
action02 = [parser.OFPActionOutput(4)] # for switch 5
weight01 = 50
weight02 = 50
watch_port = ofproto_v1_3.OFPP_ANY
watch_group = ofproto_v1_3.OFPQ_ALL
buckets = [parser.OFPBucket(weight01, watch_port, watch_group,
action01), parser.OFPBucket(weight02, watch_port, watch_group, action02)]
req = parser.OFPGroupMod(datapath, ofproto.OFPFC_ADD,
ofproto.OFPGT_SELECT, group_id, buckets)
datapath.send_msg(req)
#....................................................... switch_in_handler
...................................................
# pro-active rule in
Switch 1
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
def switch_features_handler(self, ev):
datapath = ev.msg.datapath
dpid = datapath.id<http://datapath.id>
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
if datapath.id<http://datapath.id> == 1:
self.group_mod01(datapath)
actions = [parser.OFPActionSetField(ip_dscp = 1),
parser.OFPActionGroup(group_id = 1)]
priority = 100
match = parser.OFPMatch(in_port= 1, eth_type=0x0800,
ipv4_src='10.0.0.1', ipv4_dst='10.0.0.2', ip_proto=17, udp_dst=5555 )
self.add_flow(datapath, priority , match, actions)
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--
Atenciosamente,
Jose Carlos Ferreira
Mestrando em Ciencia da Computacao
Analista de Redes e Sistemas PoP-PE/RNP
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