diff --git a/modules/nw-metallb-layer2.adoc b/modules/nw-metallb-layer2.adoc
index a8f89e1cb0..6d1a93f68e 100644
--- a/modules/nw-metallb-layer2.adoc
+++ b/modules/nw-metallb-layer2.adoc
@@ -7,8 +7,12 @@
 [id="nw-metallb-layer2_{context}"]
 = MetalLB concepts for layer 2 mode
 
-In layer 2 mode, the `speaker` pod on one node announces the external IP address for a service to the host network.
-From a network perspective, the node appears to have multiple IP addresses assigned to a network interface.
+In layer 2 mode, the `speaker` pod on one node announces the external IP address for a service to the host network. 
+From a network perspective, the node appears to have multiple IP addresses assigned to a network interface. 
+[NOTE]
+====
+Since layer 2 mode relies on ARP and NDP, the client must be on the same subnet of the nodes announcing the service in order for MetalLB to work. Additionally, the IP address assigned to the service must be on the same subnet of the network used by the client to reach the service. 
+====
 
 The `speaker` pod responds to ARP requests for IPv4 services and NDP requests for IPv6.