Hi Arslan,
As you said, you can create a new port (like "ovs-vsctl add-port" command) by
using the APIs
of OVSBridge, but your problem seems not be able to be solved with this APIs.
Your question is "How to create a new link between s1 and h2", right?
This is matter of usage of Mininet, I guess.
To create a new link between them, you need to create interfaces on both nodes
(OVS and Linux
Host), but creating a new interface (veth) on Linux is the out-side of OpenFlow
and Ryu (it
should be done on Mininet side).
If you want to create topology like;
h1---s1---s2---h2
| |
+---------+
Please try the following script.
(Mininet CLI (mn) command does not provide enough options for creating a
complex topology.)
====
#!/usr/bin/env python
from mininet.cli import CLI
from mininet.net import Mininet
from mininet.node import RemoteController
from mininet.log import setLogLevel
def main():
# h1 ---s1---s2---h2
# | |
# +---------+
net = Mininet(controller=RemoteController)
net.addController('c0')
s1 = net.addSwitch('s1')
s2 = net.addSwitch('s2')
h1 = net.addHost('h1')
h2 = net.addHost('h2')
net.addLink(s1, h1)
net.addLink(s2, h2)
net.addLink(s1, h2)
net.addLink(s1, s2)
net.start()
CLI(net)
net.stop()
if '__main__' == __name__:
setLogLevel('info')
main()
====
Thanks,
Iwase
On 2017年10月27日 21:48, Arslan wrote:
Dear All,
I am trying to add an interface in the mininet topology through Ryu controller however being a
beginner, I am not sure how can I do it.
Description of what I want to do: Consider this linear topology
h1----s1----s2----h2
In this topology, I would like to make a connection of h2 to s1 so that the traffic from h1 to h2
doesn't go through s2.
What I have found till now is I can use, /class OVSBridge(object) /which can be found here
https://github.com/osrg/ryu/blob/master/ryu/lib/ovs/bridge.py#L92
However, I don't know which function in this class are more appropriate to do this. A precise
example will be highly appreciated. Thank you all
Regards
Arslan
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