Comment 5 for bug 1938573

Ok, I've managed to reproduce this locally with by having to rack controllers, one that can access the BMC via layer2, and the other that has layer3 access only.

If I turn off the first rack controller, I get the same error. There's code that should try all rack controllers if it can't find any that has a direct connection, but for some reason that code doesn't work. Will have to look into that.

To work around it, I manually inserted a row in the maasserver_bmcroutablerackcontrollerrelationship:

  https://paste.ubuntu.com/p/TFR6VT8szh/

That's the table that MAAS should update if it doesn't find a rack controller that can currently connect to the BMC.