DNS pods did not resolve

[nikolatsio]

Dear all,

our setup:
ACI - 4.2(7t);
VMware - 7 u3;
in the vars file is set to not provision DNS on the LB machine;

We tried several times to install the OCP without success(ocp 4.13, ocp 4.12, ocp4.11). Almost all the Cluster Operators are OK, but some of them are receiving errors with the communication. Based on that we troubleshooted it and we figured out that they have a problem with the DNS pods. There is a problem with the DNS pods in openshift-dns namespace.

The DNS pods are in a RUNNING state.
When trying to execute on them "dig dig oauth-openshift.apps." it is timeout. But if we execute the same command from the nodes it is OK.

Are we missing something from your docs(https://www.cisco.com/c/en/us/td/docs/dcn/aci/containers/installation/openshift-on-vsphere/installing-openshift-4-13-on-vmware-vsphere.html)?