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Thanks for the reply,

I double checked that the controller ip's were changed in mininet and they were. When I enter the above cURL command in both ODL 1 & 2 the only response is {"vtn-topology":{}}

I have pasted here the output from mininet. I notice there is no port number after my ODL ip addresses, as there is when using a single controller? mininet@mininet:~/mininet/mininet$ sudo python multitree.py * Creating remote controller: c1 (192.168.56.110) Creating remote controller: c2 (192.168.56.120) Creating network Adding hosts: h1 h2 h3 h4 h5 h6 h7 h8 Adding switches: s1 s2 s3 s4 s5 s6 Adding links: (s1, s2) (s1, s3) (s1, s4) (s2, h1) (s2, h2) (s3, h3) (s3, h4) (s4, s5) (s4, s6) (s5, h5) (s5, h6) (s6, h7) (s6, h8) Configuring hosts h1 h2 h3 h4 h5 h6 h7 h8 Starting network Starting controller: c1 + Starting switches ... s1 s2 s3 Starting controller: c2 + Starting switches ... s4 s5 s6 Running CLI * Starting CLI:

I'm fairly sure my problem is with mininet/OVS as the single controller tutorial worked fine for me on the same machines

Thanks for the reply,

I double checked that the controller ip's were changed in mininet and they were. When I enter the above cURL command in both ODL 1 & 2 the only response is {"vtn-topology":{}}

I have pasted here the output from mininet. I notice there is no port number after my ODL ip addresses, as there is when using a single controller? mininet@mininet:~/mininet/mininet$ sudo python multitree.py * Creating remote controller: c1 (192.168.56.110) Creating remote controller: c2 (192.168.56.120) Creating network Adding hosts: h1 h2 h3 h4 h5 h6 h7 h8 Adding switches: s1 s2 s3 s4 s5 s6 Adding links: (s1, s2) (s1, s3) (s1, s4) (s2, h1) (s2, h2) (s3, h3) (s3, h4) (s4, s5) (s4, s6) (s5, h5) (s5, h6) (s6, h7) (s6, h8) Configuring hosts h1 h2 h3 h4 h5 h6 h7 h8 Starting network Starting controller: c1 + Starting switches ... s1 s2 s3 Starting controller: c2 + Starting switches ... s4 s5 s6 Running CLI * Starting CLI:

I'm fairly sure my problem is with mininet/OVS as the single controller tutorial worked fine for me on the same machines