@Devesh_Aggrawal you may need to update the IP Binding info for your mongod. For example, starting a node with mongod --port 27017 ... will only bind to localhost and listen on port 27017.
Using mongod --port 27017 --bind_ip_all will bind to all IPv4/v6 addresses. For local testing this may be the easiest way to get this sorted out, but if you’re managing a production cluster I’d recommend configuring your IP bindings a bit more restrictively 