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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