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>
Sent: Thursday, 21 December 2017 10:50 AM
To: Ul Huque, Tanvir (Data61, Eveleigh ATP)
Cc: 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 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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