Re: [Ryu-devel] All the links of the topology not getting discovered.

[Taha Khan]

Thanks for the reply.
But do you have any rough idea, how many links should a topology have to
not hit performance limit?
This is my systems specs.
I need EventLinkAdd and  EventLinkDelete to work properly as I am planning
to introduce multiple link failures from mininet.

I started with 62 nodes, 107 links and trimmed my topology to 30 Nodes and
43 Links(86 bi-directional) and found, I was able to discover the full
topology but EventLinkDelete wasn't triggering when I tried
with mininet (link down command).
Now I have 30 Nodes, 32 Links and still EventLinkDelte is not getting
triggered though I see the full topology information in my structures
storing their information in RYU controller.








Thanks!
Taha

On Fri, Mar 23, 2018 at 3:45 AM, Iwase Yusuke 
wrote:

> Hi Taha,
>
> IIRC, the similar problems had reported before on this mailing list.
> I think you hit the performance limit of "single" controller in order to
> use
> topology discovery feature against such many switches.
>
> For handling such large topology, how about splitting your topology into
> some
> sub-topology and having multiple controllers?
>
> Thanks,
> Iwase
>
>
>
> On 2018年03月23日 16:07, Taha Khan wrote:
>
>> Hi
>>
>> I am using RYU-4.23 and Mininet OVS.
>> I have a 62 Node topology. When I run my RYU application I noticed that
>> RYU is not able to discover all the datapaths and links everytime I run my
>> code. And also when I run (link down command ) in mininet CLI,
>> EventLinkDelete is not getting triggered everytime I did it. Few times I
>> was actually able to discover the full topology and EventLinkDelete was
>> also getting triggered.
>> Can you please suggest why is this so. I have attached codes below.
>>
>>
>> Thanks!
>> Taha
>>
>>
>> 
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[Ryu-devel] Disable/Enable switch port with ryu

[Valson Pereira]

Hi everyone;

How i can disable/enable a specific swicth port with ryu?

Thanks.
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[Ryu-devel] ryu-devel：如何培养整个公司的质量意识？ 65487

[cohjnk]

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[Ryu-devel] 转发：新任管理者如何自我提升

[鞠�u光]

ryu-devel@lists.sourceforge.net

73571 ¸½.¼þ.ÄÚ.ÈÝ.Çë.²é.ÔÄ
<>
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[Ryu-devel] 信誉开票

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Re: [Ryu-devel] Spliting flows through two ports

[Jose Carlos Ferreira de Melo Junior]

Hey Iwase,


Split means really divide the flow I dont know if would be like a load
balancing (I think it is)

For example the image below




But I dont know if this would be possible using the group table.

2018-03-23 4:04 GMT-03:00 Iwase Yusuke :

> Hi Carlos,
>
> What does "split flows" exactly mean?
>
> > req = parser.OFPGroupMod(datapath, ofp.OFPFC_ADD, ofp.OFPGT_SELECT,
> >  group_id, buckets)
>
> If you specify OFPGT_SELECT, switch will execute "one" bucket in the group
> and
> not copied like the port mirroring. If you intend to do port mirroring,
> you need
> to specify OFPGT_ALL. For other available group types, please refer to the
> OpenFlow spec and your switch's specification.
>
> Thanks,
> Iwase
>
>
> On 2018年03月21日 04:02, Jose Carlos Ferreira de Melo Junior wrote:
>
>> Hi there,
>>
>> I know this topic was discussed before but I would like just a simple
>> explanation about it.
>>
>> Because I am using the group table with openflow 1.3 with no sucess.
>>
>>
>> My purpose is to split one flow in two flows and forward on port 3 and 4
>> using the group table.
>>
>> My code is as follows:
>>
>>
>> *def group_mod(self, datapath):*
>> *global ofp, _parser_, dp*
>> *port_1 = 4*
>> *queue_1 = _parser_.OFPActionSetQueue(0)*
>> *actions_1 = [queue_1, _parser_.OFPActionOutput(port_1)]*
>> *
>> *
>> *
>> *
>> *port_2 = 3*
>> *queue_2 = _parser_.OFPActionSetQueue(0)*
>> *actions_2 = [queue_2, _parser_.OFPActionOutput(port_2)]*
>> *
>> *
>> *weight_1 = 50*
>> *weight_2 = 50*
>> *
>> *
>> *watch_port = ofproto_v1_3.OFPP_ANY*
>> *watch_group = ofproto_v1_3.OFPQ_ALL*
>> *
>> *
>> *buckets = [*
>> *_parser_.OFPBucket(weight_1, watch_port, watch_group,
>> actions_1),*
>> *_parser_.OFPBucket(weight_2, watch_port, watch_group,
>> actions_2)]*
>> *
>> *
>> *group_id = 50*
>> *
>> *
>> *req = _parser_.OFPGroupMod(datapath, ofp.OFPFC_ADD,
>> ofp.OFPGT_SELECT,*
>> *group_id, buckets)*
>> *
>> *
>> *datapath.send_msg(req)*
>> *
>> *
>> *
>> *
>> *
>> *
>> Hope this is right.
>>
>> Could anyone help me with this issue?
>>
>>
>>
>>
>> --
>> Best regards,
>> José Carlos Ferreira
>> Msc student in Computer Science
>> System and Network Analyst at PoP-PE/RNP
>>
>>
>> 
>> --
>> Check out the vibrant tech community on one of the world's most
>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>>
>>
>>
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>> https://lists.sourceforge.net/lists/listinfo/ryu-devel
>>
>>


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José Carlos Ferreira
Msc student in Computer Science
System and Network Analyst at PoP-PE/RNP
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[Ryu-devel] Create or Upgrade Website To Drive More Traffic (NX3)

[Gina Smith via Ryu-devel]

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Re: [Ryu-devel] BGP Usecase

[knet solutions]

Hi PA,

Thanks for the response.

Regarding use case1   (1.- Have an SDN domain look like a BGP router, for
example, a central office that grooms end-users and interacts with the
ISP's infrastructure),

SDN controller(app) is act  as a  BGP router, establishes the  neighbor
relation ships with one more ISPs for exchange routes.

Is that correct?  Still i need to visualize in eagles view, to see how data
path establishes between the ISP and SDN domain.


Regarding use case2)

you mean, exchanging the Routes between different SDN Controllers?

thanks
Suresh


On Fri, Mar 23, 2018 at 2:45 PM, Pedro Andres Aranda Gutierrez <
paag...@gmail.com> wrote:

> Hi Suresh,
>
> I see two use cases:
>
> 1.- Have an SDN domain look like a BGP router, for example, a central
> office that grooms end-users and interacts with the ISP's infrastructure
> 2.- Researchy kind of things like using BGP-4 for a possible East-West
> interface between SDN domains,
>
> /PA
>
> On 23 March 2018 at 03:17, knet solutions 
> wrote:
>
>> Hi,
>>
>> I see couple of mail threads related to BGP stuff.I couldn't understand
>> the  use case of the BGP with SDN.  Can some one point that reference links
>> / use case details for BGP in SDN Controllers.
>>
>>
>> Thanks
>> Suresh
>> --
>>
>> *Regards, *
>> *Knet solutions.*
>>
>> https://github.com/knetsolutions/KNet
>> http://knet-topology-builder.readthedocs.io/
>> http://knetsolutions.in/
>>
>>
>> 
>> --
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>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
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>>
>>
>
>
> --
> Fragen sind nicht da um beantwortet zu werden,
> Fragen sind da um gestellet zu werden
> Georg Kreisler
>



-- 

*Regards, *
*Knet solutions.*

https://github.com/knetsolutions/KNet
http://knet-topology-builder.readthedocs.io/
http://knetsolutions.in/
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Re: [Ryu-devel] BGP Usecase

[Pedro Andres Aranda Gutierrez]

Hi Suresh,

I see two use cases:

1.- Have an SDN domain look like a BGP router, for example, a central
office that grooms end-users and interacts with the ISP's infrastructure
2.- Researchy kind of things like using BGP-4 for a possible East-West
interface between SDN domains,

/PA

On 23 March 2018 at 03:17, knet solutions  wrote:

> Hi,
>
> I see couple of mail threads related to BGP stuff.I couldn't understand
> the  use case of the BGP with SDN.  Can some one point that reference links
> / use case details for BGP in SDN Controllers.
>
>
> Thanks
> Suresh
> --
>
> *Regards, *
> *Knet solutions.*
>
> https://github.com/knetsolutions/KNet
> http://knet-topology-builder.readthedocs.io/
> http://knetsolutions.in/
>
>
> 
> --
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> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
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>
>


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Re: [Ryu-devel] Simulation for flow-table attack using ryu

[Fujimoto Satoshi]

Hi,

Thank you for the information!

In my environment, the simulation completed successfully.
I think your problem is lack of resource, especially CPU performance.
While Monitoring resource, CPU usage eventually reached 100%, but Memory 
usage has hardly changed.


My CPU is : Intel(R) Core(TM) i5-2320 CPU @ 3.00GHz

Thanks,
Fujimoto

On 2018年03月20日 17:21, ‏Eman ‏ Bany salameh via Ryu-devel wrote:

For the topology code just run this command
$sudo python slow-TCAM-topolgy.py
But keep the SYN-ACk.py script in the same directory with the topology 
code.


You can run the controller as any ryu application code, but keep in 
mind to start the controller before you run the topology code

$ ./bin/ryu-manager  app/slow-tcam-attack.py

Thanks,
Eman Bany Salameh


On Mar 20, 2018, at 7:41 AM, Fujimoto Satoshi 
> wrote:



Hi,

I'd like to run your application in my environment.
Could you tell me how to use these three scripts?

Thanks,
Fujimoto

On 2018年03月20日 02:05, ‫Eman Bany salameh‬ ‫ via Ryu-devel wrote:

Hello All,

I need to simulate slow SYN attack in mininet with Ryu. I need to 
fill the switch flow table with 1500 flow entries. However, when I 
run the code the maximum number of flows I saw was 67, and after  a 
while of running the code, my laptop holds.
My Laptop has Intel Core i5 cpu with 8GB RAM. I need to know if the 
problem from limited resources or from bug in the code.
The attached is my topology code with the controller code and the 
shell the host needs to run to generate SYN packets.


Any help will be appreciated.

Regards,


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Re: [Ryu-devel] All the links of the topology not getting discovered.

[Iwase Yusuke]

Hi Taha,

IIRC, the similar problems had reported before on this mailing list.
I think you hit the performance limit of "single" controller in order to use
topology discovery feature against such many switches.

For handling such large topology, how about splitting your topology into some
sub-topology and having multiple controllers?

Thanks,
Iwase


On 2018年03月23日 16:07, Taha Khan wrote:

Hi

I am using RYU-4.23 and Mininet OVS.
I have a 62 Node topology. When I run my RYU application I noticed that RYU is 
not able to discover all the datapaths and links everytime I run my code. And 
also when I run (link down command ) in mininet CLI, EventLinkDelete is not 
getting triggered everytime I did it. Few times I was actually able to discover 
the full topology and EventLinkDelete was also getting triggered.

Can you please suggest why is this so. I have attached codes below.


Thanks!
Taha


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Re: [Ryu-devel] Informing the controller about the first switch Datapath and port number which connected to the host.

[Iwase Yusuke]

Hi Soliman,

"ryu.topology" provides such feature, I guess.
How about the following APIs and events?
https://github.com/osrg/ryu/blob/master/ryu/topology/api.py#L38-L44
https://github.com/osrg/ryu/blob/e6773539b546576c13f7397769d2001c46bbfdaa/ryu/topology/event.py#L169-L186

If you want to implement your own host detection logic, the following app might
be helpful for you.
https://github.com/osrg/ryu/blob/master/ryu/topology/switches.py

Thanks,
Iwase


On 2018年03月22日 03:45, Soliman Awad Alshra´a Abdullah TU Ilmenau wrote:

Hello Dears,

In my topology, I should send packets from the host to a Ryu controller through 
many switches. I need to inform the controller about the first switch Datapath 
and port number which connected to the host.




Any idea or advice ?

Thanks in advance



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[Ryu-devel] All the links of the topology not getting discovered.

[Taha Khan]

Hi

I am using RYU-4.23 and Mininet OVS.
I have a 62 Node topology. When I run my RYU application I noticed that RYU
is not able to discover all the datapaths and links everytime I run my
code. And also when I run (link down command ) in mininet CLI,
EventLinkDelete is not getting triggered everytime I did it. Few times I
was actually able to discover the full topology and EventLinkDelete was
also getting triggered.
Can you please suggest why is this so. I have attached codes below.


Thanks!
Taha
from mininet.net import Mininet
from mininet.node import Controller, RemoteController
from mininet.cli import CLI
from mininet.log import setLogLevel, info
from time import sleep

Nodes=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
   17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
   30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44,
   45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62]

Links=[[1, 2], [1, 3], [3, 4], [3, 5], [6, 7], [6, 8], [4, 9], [10, 9], [10, 11],
   [5, 12], [5, 7], [5, 11], [5, 9], [5, 13], [9, 14], [9, 15],
   [9, 16], [9, 17], [15, 18], [19, 20], [19, 21], [19, 22],
   [23, 24], [23, 25], [25, 26], [25, 20], [25, 27], [28, 29],
   [28, 30], [29, 31], [29, 32], [29, 33], [29, 30], [29, 34],
   [35, 36], [35, 37], [37, 38], [37, 30], [38, 39], [39, 25],
   [25, 30], [30, 40], [30, 26], [30, 33], [30, 41], [30, 42],
   [30, 43], [30, 44], [45, 46], [45, 47], [45, 41], [45, 44],
   [27, 40], [27, 20], [27, 48], [27, 21], [48, 49], [48, 50],
   [32, 26], [41, 47], [16, 33], [16, 51], [16, 52], [16, 21],
   [49, 40], [22, 20], [53, 24], [53, 54], [24, 26], [43, 40],
   [31, 54], [42, 40], [40, 46], [40, 33], [40, 50], [55, 56],
   [55, 21], [34, 33], [51, 57], [51, 21], [56, 33], [21, 57],
   [21, 26], [21, 33], [21, 20], [54, 26], [36, 46], [7, 33],
   [7, 58], [12, 52], [12, 8], [13, 17], [46, 33], [46, 59],
   [46, 58], [59, 58], [58, 33], [33, 60], [33, 8], [8, 61],
   [8, 2], [52, 14], [52, 18], [52, 62], [62, 14], [14, 18], [60, 61]]



def emptyNet():
"Create an empty network and add nodes to it."

net = Mininet(controller=RemoteController)

info('*** Adding controller\n')
net.addController('c0', controller=RemoteController, ip='127.0.0.1', port=6633)


info('*** Adding hosts\n')
h = []
for i in Nodes:
host = 'h' + str(i)
h.append(net.addHost(host))

info('*** Adding switch\n')
s = []
for j in Nodes:
switch = 's' + str(j)
s.append(net.addSwitch(switch))
"""print(s)"""

info('*** Creating links\n')
## One host at each switch
for index in range(0,len(Nodes)):
net.addLink(s[index], h[index])

i=0;

for link_pair in Links:
i=i+1;
net.addLink('s'+str(link_pair[0]), 's'+str(link_pair[1]))
print('s'+str(link_pair[0]), 's'+str(link_pair[1]), i)


info('*** Starting network\n')
net.start()

for i in s:
	i.cmd('ovs-vsctl set bridge', i ,'protocols=OpenFlow13')

info('*** Running CLI\n')
CLI(net)
#sleep(2)
#net.pingAll()

info('*** Stopping network')
net.stop()


if __name__ == '__main__':
setLogLevel('info')
emptyNet()



# Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from ryu.base import app_manager
from ryu.controller import ofp_event
from ryu.controller.handler import set_ev_cls
from ryu.ofproto import ofproto_v1_3
from ryu.lib.packet import packet
from ryu.lib.packet import ethernet
from ryu.lib.packet import ether_types
import logging
import struct
from ryu.controller.handler import MAIN_DISPATCHER, DEAD_DISPATCHER, CONFIG_DISPATCHER
from ryu.lib.packet import ipv4
from ryu.lib import mac
from ryu.lib.packet import arp
from ryu.topology import event, switches
from ryu.topology.api import get_switch, get_link
from ryu.controller import dpset
from ryu.lib import dpid
from ryu.controller import handler
from threading import Timer


class SimpleSwitch14(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
_CONTEXTS = {'dpset': dpset.DPSet}

def __init__(self, *args, **kwargs):
super(SimpleSwitch14, self).__init__(*args, **kwargs)
self.topology_api_app = self
self.mac_to_port = {}
self.switch_port_table = {}
self.link_to_port = {}
self.interior_ports = {}

Re: [Ryu-devel] Spliting flows through two ports

[Iwase Yusuke]

Hi Carlos,

What does "split flows" exactly mean?

> req = parser.OFPGroupMod(datapath, ofp.OFPFC_ADD, ofp.OFPGT_SELECT,
>  group_id, buckets)

If you specify OFPGT_SELECT, switch will execute "one" bucket in the group and
not copied like the port mirroring. If you intend to do port mirroring, you need
to specify OFPGT_ALL. For other available group types, please refer to the
OpenFlow spec and your switch's specification.

Thanks,
Iwase


On 2018年03月21日 04:02, Jose Carlos Ferreira de Melo Junior wrote:

Hi there,

I know this topic was discussed before but I would like just a simple 
explanation about it.


Because I am using the group table with openflow 1.3 with no sucess.


My purpose is to split one flow in two flows and forward on port 3 and 4 using 
the group table.


My code is as follows:


*def group_mod(self, datapath):*
*        global ofp, _parser_, dp*
*        port_1 = 4*
*        queue_1 = _parser_.OFPActionSetQueue(0)*
*        actions_1 = [queue_1, _parser_.OFPActionOutput(port_1)]*
*
*
*
*
*        port_2 = 3*
*        queue_2 = _parser_.OFPActionSetQueue(0)*
*        actions_2 = [queue_2, _parser_.OFPActionOutput(port_2)]*
*
*
*        weight_1 = 50*
*        weight_2 = 50*
*
*
*        watch_port = ofproto_v1_3.OFPP_ANY*
*        watch_group = ofproto_v1_3.OFPQ_ALL*
*
*
*        buckets = [*
*                _parser_.OFPBucket(weight_1, watch_port, watch_group, 
actions_1),*
*                _parser_.OFPBucket(weight_2, watch_port, watch_group, 
actions_2)]*
*
*
*        group_id = 50*
*
*
*        req = _parser_.OFPGroupMod(datapath, ofp.OFPFC_ADD, ofp.OFPGT_SELECT,*
*                group_id, buckets)*
*
*
*        datapath.send_msg(req)*
*
*
*
*
*
*
Hope this is right.

Could anyone help me with this issue?




--
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José Carlos Ferreira
Msc student in Computer Science
System and Network Analyst at PoP-PE/RNP


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Re: [Ryu-devel] Running multiple controllers

[Iwase Yusuke]

Hi,

I think this issue is a problem of Mininet not Ryu. I found the similar script
on Mininet's GitHub, but I don't know further.
https://github.com/mininet/mininet/blob/master/examples/controllers2.py

Thanks,
Iwase


On 2018年03月21日 00:05, Soliman Awad Alshra´a Abdullah TU Ilmenau wrote:

Hello all,

I am setting up a topology consists of 5 switches and 2 controllers, three 
switches connect to the first controller and the other connect to the second one.


    C1    C2

   /    |    \     / \

s1-- s2 - s3--s4--s5

c1 = net.addController('c1', controller=RemoteController, ip="127.0.0.1", 
port=6634)

c2 = net.addController('c2', controller=RemoteController, ip="127.0.0.2", 
port=6633)

and I use :

c1.start()

c2.start()

s1.start([c1])

s2.start([c1])

s3.start([c1])

s4.start([c2])

s5.start([c2])

unfortunately, All switches connect to both of controllers.

1 - how to force s1, s2 and s3 to  get instructions from C1 only ?

2 - how to install some entry to a certain switch ?



I look forward to hearing you

Thanks in advance
A.Soliman

*


*



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