Hi @magr90900,
Have you configured the consul.hashicorp.com/connect-inject: 'true' annotation on both the downstream and upstream pods? You will need a proxy on the downstream host in order to connect to the upstream once it is in the service mesh.
Also, are ACLs enabled in your cluster? If so, have you created an Intention to allow access between these two services?
BTW, I see you’re debugging a similar issue in the thread How to access the services registered in the consul catalog. I’d be happy to continue this discussion there if you would prefer to consolidate the conversations.