diff --git a/p2p/enode/node.go b/p2p/enode/node.go
index 1b8f7bc14c..a7d0f7b91a 100644
--- a/p2p/enode/node.go
+++ b/p2p/enode/node.go
@@ -149,6 +149,7 @@ func Parse(validSchemes enr.IdentityScheme, input string) (*Node, error) {
 	return New(validSchemes, &r)
 }
 
+// Portal network not filter multicast address, any other way to support this?
 func ParseForAddEnr(validSchemes enr.IdentityScheme, input string) (*Node, error) {
 	if strings.HasPrefix(input, "enode://") {
 		return ParseV4(input)