diff --git a/federation/cluster/common.sh b/federation/cluster/common.sh
index 87e00f16494..a326543cab1 100644
--- a/federation/cluster/common.sh
+++ b/federation/cluster/common.sh
@@ -94,7 +94,7 @@ function create-federation-api-objects {
     export FEDERATION_API_NODEPORT=32111
     export FEDERATION_NAMESPACE
     export FEDERATION_NAME="${FEDERATION_NAME:-federation}"
-    export DNS_ZONE_NAME="${DNS_ZONE_NAME:-example.com}"
+    export DNS_ZONE_NAME="${DNS_ZONE_NAME:-federation.example}"  # See https://tools.ietf.org/html/rfc2606
 
     template="go run ${KUBE_ROOT}/federation/cluster/template.go"