"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 <[email protected]>
Sent: Monday, 25 December 2017 6:08 PM
To: Ul Huque, Tanvir (Data61, Eveleigh ATP)
Cc: [email protected]
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, [email protected] 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 <[email protected]>
> Sent: Thursday, 21 December 2017 10:50 AM
> To: Ul Huque, Tanvir (Data61, Eveleigh ATP)
> Cc: [email protected]
> 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, [email protected] 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
>> ofproto = datapath.ofproto
>> parser = datapath.ofproto_parser
>>
>> if 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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>>
>>
>>
>> _______________________________________________
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>> https://lists.sourceforge.net/lists/listinfo/ryu-devel
>>
>
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