Can p4runtime controller coexist with root namespace switch?

P4 Dev
1

Hi there, my problem is that the controller I use need to take information from a mininet host (say, H3) so that it can insert or delete corresponding entry to the p4switch.
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According to this post Connect mininet hosts to root namespace, in which it suggests that we can use the actual host as H3. So I followed his step, set H2 to be 10.0.3.3 and root-eth0 on my actual host to be 10.0.3.4. Now I can successfully ping between H2 and my actual host. However, if I try to run my p4runtime python code, the connection between H2 and the actual host seems broken.

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I don’t know what the cause may be, this problem seems wierd to me. Is it because the controller cannot work with the root namespace scenario?
Thanks!

2

Hi @gxpy

Did you tried to inspect the table/s of the switches, in other word are you sure that when you connect the controller to the switch the flow rules remain there/are correct

3

Thanks a lot for your advice! After checking the table I found that if using the p4runtime controller, the previous entry installed by runtime json will be gone. Sorry I didn’t know about that :smile:.

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