What i am planning to do is implement a research paper by Ricardo Bennesby, Paulo Fonseca, Edjard Mota and Alexandre Passito which talks about a development of a inter AS routing component for Software Defined Networks(SDN).
For that they have used mininet for implementation. I am planning to do the same. So i need to create the initial topology with 2 or more autonomous systems which are unable to communicate with one another. I thought having the above example with 2 controllers in different subnets will mean 2 AS. But they are able to communicate with one another.. On Tue, Nov 6, 2012 at 4:33 PM, yashwanth kp <[email protected]>wrote: > What i am planning to do is implement a research paper by Ricardo > Bennesby, Paulo Fonseca, Edjard Mota and Alexandre Passito which talks > about a development of a inter AS routing component for Software Defined > Networks(SDN). > > For that they have used mininet for implementation. > > I am planning to do the same. > > So i need to create the initial topology with 2 or more autonomous systems > which are unable to communicate with one another. > > I thought having the above example with 2 controllers in different subnets > will mean 2 AS. > But they are able to communicate with one another.. > > (I have attached the research paper with this mail) > > > On Tue, Nov 6, 2012 at 4:16 PM, Murphy McCauley <[email protected] > > wrote: > >> On Nov 6, 2012, at 2:07 AM, yashwanth kp wrote: >> > But now since the hosts (h0,h1) and hosts(h2,h3) are in different >> subnets, can they still communicate? >> > I tried and they are able to ping each other.. >> > But i thought since they are in different subnets they will not be able >> to communicate.. >> > So how do i simulate different AS interconnected by switches? >> > can different SDN based AS interconnect by switches communicate with >> one another without the need for an additional component? >> >> >> Subnets are an aspect of traditional L3 routing. But you have an >> all-OpenFlow network -- it has no traditional L3 routers in it, so there >> aren't really any subnets unless you write code to make them. >> >> Using the simple learning switch components (e.g., l2_learning), you can >> stick one OpenFlow island with a controller next to another OpenFlow island >> with a different controller, and things will just work. This even works >> with l3_learning. But these work by learning where every individual >> destination is. To oversimplify things, this doesn't scale that well, so >> large networks (like the internet) don't work that way and instead work by >> by aggregating addresses at several levels (e.g., subnets). You can >> implement similar things in OpenFlow, but you have to write the code for it. >> >> I'm not clear on exactly what you mean by an "SDN based AS". Are you >> trying to reinvent interdomain routing using OpenFlow? Implement an AS in >> OpenFlow? Link an OpenFlow network in one AS with an OpenFlow network in >> another AS via a tunnel? Something else? SDN is flexible; you can make >> networks do all sorts of things if you're willing to write the code... >> >> Good luck. >> >> -- Murphy > > > > > -- > Regards, > > Yashwanth K P > Final Year , B.Tech > NITK, Surathkal > Contact: +91-9538403606 > > -- Regards, Yashwanth K P Final Year , B.Tech NITK, Surathkal Contact: +91-9538403606
