Error when adding a node from a different network after installation

[Kronk74]

Hi,

I'm using OKD version 4.14. My cluster was created in UPI via a custom script.

After adding new nodes from a different network, they appeared correctly inside OKD console and their status are READY.
The thing is that service monitor targets show us a warning which explain that they are not working well :

I checked firewall configs and no block, drop or reject packets were noticed. Every thing seems working fine.

I also tried to see if there's something wrong with OVNKubernetes with this command :

./ovnkube-trace -src-namespace openshift-monitoring -src prometheus-k8s-0 -dst-namespace openshift-dns -dst dns-default-2j4gt -tcp -dst-port 9154 -loglevel 0 -kubeconfig results/auth/kubeconfig

Result :

ovn-trace source pod to destination pod indicates success from prometheus-k8s-0 to dns-default-2j4gt
ovn-trace (remote) source pod to destination pod indicates success from prometheus-k8s-0 to dns-default-2j4gt
ovn-trace destination pod to source pod indicates success from dns-default-2j4gt to prometheus-k8s-0
ovn-trace (remote) destination pod to source pod indicates success from dns-default-2j4gt to prometheus-k8s-0
ovs-appctl ofproto/trace source pod to destination pod indicates success from prometheus-k8s-0 to dns-default-2j4gt
ovs-appctl ofproto/trace destination pod to source pod indicates success from dns-default-2j4gt to prometheus-k8s-0
ovn-detrace source pod to destination pod indicates success from prometheus-k8s-0 to dns-default-2j4gt
ovn-detrace destination pod to source pod indicates success from dns-default-2j4gt to prometheus-k8s-0

Do you know how can I figure it out ?

Best regards,

Thomas