When using VCF Installer deployed on one of the hosts used in the to be created Management Domain we ran into an issue with DNS config.
OVA was deployed with all settings correct and DNS records created including PTR (reverse) records. After some testing we found the hosts file on the SDDC Manager/VCF Installer to be configured with the loopback address 127.0.0.1 and the FQDN we entered in the details. This made us fail on step 11 of deploying the Fleet:
Cannot determine host name for IP x.x.x.xhere it will ask you for the fqdn of the sddc manager vm but entering that and then continueing will not fix it because then it flags the sddc manager as not being on the host.
so we decided to try and change the loopback address in the hosts file to the actual IP address and that fixed our issue.
I also found this article about DNS on the VCF Installer to help me troubleshoot : https://knowledge.broadcom.com/external/article/405013/vcf-installer-validate-deploy-dns-erro.html
I hope this helps future deployments!
UPDATE : on a second attempt with a clean deploy of the Installer OVA the line was not present and that also works.