diff --git a/modules/nw-ingress-gateway-api-enable.adoc b/modules/nw-ingress-gateway-api-enable.adoc
index eb339fb91d53..1c69083624cc 100644
--- a/modules/nw-ingress-gateway-api-enable.adoc
+++ b/modules/nw-ingress-gateway-api-enable.adoc
@@ -145,6 +145,12 @@ $ oc get deployment -n openshift-ingress example-gateway-openshift-default
 NAME                                 READY   UP-TO-DATE   AVAILABLE   AGE
 example-gateway-openshift-default    1/1     1            1           25s
 ----
++
+[NOTE]
+====
+The difference between highly available and non-highly-available topologies is the minimum number of replicas: at least two on highly available clusters, and one on clusters that do not use a highly available topology. Either topology can scale a gateway deployment out to ten replicas.
+====
+
 *** To verify the service, run the following command:
 +
 [source,terminal]