Ipmininet, mininet, and frr were successfully installed, but when creating a router, the configuration check reported an error!!!

[Zzz7757]

I am a beginner in Ubuntu. When I install ipmininet on Ubuntu 18.04 and start a router correctly, I encounter an error message. The OSPF6D daemon configurations checks for errors and I don't know how to troubleshoot. Could you please help me!

[jadinm]

I would check the version of FRR that you are using and check in the documentation that this line should be accepted in that particular version.

You can find the configuration file somewhere in /temp folder if you add the right line to your topology file.
See https://ipmininet.readthedocs.io/en/latest/getting_started.html?highlight=files#network-run for that line.

This should also help you to see if that's the line printed in the error message that is an issue or the context above.

Also, I'd disable FRR service because these daemons run in the root namespace and they are not used nor created by ipmininet. Ipmininet starts the processes by running each daemon command in other network namespaces. That said, the service shouldn't impact the run of ipmininet to have the FRR service running in parallel but it will simplify what you might see.