Comment 3 for bug 1620478

I have only one VLAN: the default untagged VLAN. I don't think I've done anything particularly weird with my configuration. I now have a region+rack controller and a rack controller. Each is on a NUC, with one network interface per NUC, on an isolated network on which there's one other NUC and my laptop. When I go to that VLAN page, put the focus in the MTU field and tab out, I get two errors:

    primary_rack: Select a valid choice. 1 is not one of the available choices.
    secondary_rack: Select a valid choice. 15 is not one of the available choices.

Sometimes I get four errors: the same as above, but repeated.