diff --git a/config/v1/types_ingress.go b/config/v1/types_ingress.go
index 484a1af0bc2..d161eb8476c 100644
--- a/config/v1/types_ingress.go
+++ b/config/v1/types_ingress.go
@@ -6,8 +6,8 @@ import metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 // +genclient:nonNamespaced
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
-// Ingress holds cluster-wide information about Ingress.  The canonical name is `cluster`
-// TODO this object is an example of a possible grouping and is subject to change or removal
+// Ingress holds cluster-wide information about ingress, including the default ingress domain
+// used for routes. The canonical name is `cluster`.
 type Ingress struct {
 	metav1.TypeMeta `json:",inline"`
 	// Standard object's metadata.
@@ -24,8 +24,13 @@ type Ingress struct {
 
 type IngressSpec struct {
 	// domain is used to generate a default host name for a route when the
-	// route's host name is empty.  The generated host name will follow this
+	// route's host name is empty. The generated host name will follow this
 	// pattern: "<route-name>.<route-namespace>.<domain>".
+	//
+	// It is also used as the default wildcard domain suffix for ingress. The
+	// default ingresscontroller domain will follow this pattern: "*.<domain>".
+	//
+	// Once set, changing domain is not currently supported.
 	Domain string `json:"domain"`
 }
 
diff --git a/config/v1/zz_generated.swagger_doc_generated.go b/config/v1/zz_generated.swagger_doc_generated.go
index d93945fb9fd..8415bd5570c 100644
--- a/config/v1/zz_generated.swagger_doc_generated.go
+++ b/config/v1/zz_generated.swagger_doc_generated.go
@@ -828,7 +828,7 @@ func (PlatformStatus) SwaggerDoc() map[string]string {
 }
 
 var map_Ingress = map[string]string{
-	"":         "Ingress holds cluster-wide information about Ingress.  The canonical name is `cluster`",
+	"":         "Ingress holds cluster-wide information about ingress, including the default ingress domain used for routes. The canonical name is `cluster`.",
 	"metadata": "Standard object's metadata.",
 	"spec":     "spec holds user settable values for configuration",
 	"status":   "status holds observed values from the cluster. They may not be overridden.",
@@ -847,7 +847,7 @@ func (IngressList) SwaggerDoc() map[string]string {
 }
 
 var map_IngressSpec = map[string]string{
-	"domain": "domain is used to generate a default host name for a route when the route's host name is empty.  The generated host name will follow this pattern: \"<route-name>.<route-namespace>.<domain>\".",
+	"domain": "domain is used to generate a default host name for a route when the route's host name is empty. The generated host name will follow this pattern: \"<route-name>.<route-namespace>.<domain>\".\n\nIt is also used as the default wildcard domain suffix for ingress. The default ingresscontroller domain will follow this pattern: \"*.<domain>\".\n\nOnce set, changing domain is not currently supported.",
 }
 
 func (IngressSpec) SwaggerDoc() map[string]string {