You should avoid using xfr: unless there’s a specific reason, because with xfr: the nameservers you set at your domain registrar will be inconsistent with the nameservers published by your box. That’s probably OK but might confuse DNS servers or might result in your secondary DNS server not actually being used if the DNS results from your box are cached by users’ upstream DNS servers (maybe).
Thaks for all this useful knowlage about namservers, now I can try them… on a different TLD domain.
It turned out, that my glue record creation problems are related to my choice of TLD. As gandi support finally figured out:
“After a check with our technical department, it appears that for .FASHION and .TOP Tlds, it is not possible to declare a Glue record for a “sub-sub” domain.
In clear you are asking on:
And this will only works for example, for:
Our technical team will fix this, but unfortunately, I have no ETA to provide for now.”
If they notify me about the fix, I will post it here! Until that, these TLDs are not really fit or MiaB I guess.