How to make the connection between the switch and the controller multi-hop？

[longmao121]

My current situation is：controllers defalut work in root namespace, and connect UserAPs which running into their own namespace by domian socket. So, I cannot I can't make the controllers multi-hop.

How to make the connection between the switch and the controller multi-hop？ Is it okay to put the controllers in their own namespace? How?

[ramonfontes]

Create a node (e.g. host) and run the controller in it.

[longmao121]

Create a node (e.g. host) and run the controller in it.

But the controller and switch cannot be connected, if run the controller in a host. h1 :10.0.0.1 、ap1 ：10.0.0.6, I can ping h1 in ap1 (xterm ap1) Is it because the controller(node c0, not ryu or nox) is still running in root namespce?

[ramonfontes]

But the controller and switch cannot be connected, if run the controller in a host.

Why not? We can help you if you provide further details.

Is it because the controller(node c0, not ryu or nox) is still running in root namespce?

Sorry, I don't know what do you mean.

[longmao121]

Sorry, I don't know what do you mean.

The controller is still in root namespace, but I run ryu in h1, is that ok？ Thank you~

[ramonfontes]

Do you need two controllers or only one??

[longmao121]

Do you need two controllers or only one??

Actuall, I have three controllers，I need a multi-hop connection between the switchs and the controllers

[ramonfontes]

Have you ever tried googling "how to configure inband controller in mininet"?

[longmao121]

Do you need two controllers or only one??

For exmaple, c1 in the range of ap1. If I run ryu in root namespce, and change ap3 loss 100% by TC, c1 will disconnect with ap3，but ap4 and ap5 have no effect

[ramonfontes]

For exmaple, c1 in the range of ap1. If I run ryu in root namespce, and change ap3 loss 100% by TC, c1 will disconnect with ap3，but ap4 and ap5 have no effect

Which effect do you expect in ap4 and ap5 other than have no effect?? Didn't you set loss only in ap3? I'm getting too confused.

[longmao121]

hahaha, unfortunately，my switch can't inband, I use CPqD/ofsoftswitch13

[longmao121]

Which effect do you expect in ap4 and ap5 other than have no effect?? Didn't you set loss only in ap3? I'm getting too confused. c1 only in the range of ap1, if ap3 loss all packects, ap4 ap5 should disconnect with c1, but not

[ramonfontes]

hahaha, unfortunately，my switch can't inband, I use CPqD/ofsoftswitch13

What? Do you mean that you cannot use inband?? Why not??

c1 only in the range of ap1, if ap3 loss all packects, ap4 ap5 should disconnect with c1, but not

I can see no links in the network topology above. So I don't know if ap4/ap5 are directly connected to the controller or not. Honestly, I see no issue here. Moreover, the problem pointed out by you is not well described.

[longmao121]

What? Do you mean that you cannot use inband?? Why not?? We tested it on hardware and confirmed that there were some problems with the in-band I can see no links in the network topology above. So I don't know if ap4/ap5 are directly connected to the controller or not. Honestly, I see no issue here. Moreover, the problem pointed out by you is not well described. All nodes are wirelessly connected, c1 is only in the range of ap1,all aps wired connection to a switch(ap1-h1 ap2-h2 ap3-h3 ap4-h4 ap5-h5). Now, c1 connect directly to all switches. However, in a real network, the connection between the c1 and ap5(for exmaple) requires ap2-ap3-ap4 forwarding. Sorry, I'm not clear about the description. I want to know how to run the controller in isolated namespce？ Or how to implement ap5 trunking with c1 through other switches. Thank you~

[ramonfontes]

I want to know how to run the controller in isolated namespce

You can try containernet https://github.com/ramonfontes/containernet

[longmao121]

You can try containernet https://github.com/ramonfontes/containernet Thanks for your response!