When deploying VCF9 you can also run into an extended wait timeout when in phase of deploying Operations. If you then look into the domainmanager logfile you can see this error :
"Wait timeout, Cloud Proxy node didn't join the Operations cluster, retry after sometime.\"this happens to be already document by Broadcom in the following KB article :
https://knowledge.broadcom.com/external/article/409008/the-firstboot-of-the-vcf-operations-coll.html
Apparently the cloud collector HAproxy component tries to resolve some url’s which are on the web and since we are deploying in an air-gapped environment we cannot resolve these. In the article it states you have to disable “DNS Recursion” we did this on the Windows DNS servers as described and were able to continue with the deployment process.
Hope this helps!