diff --git a/installing/installing_bare_metal/preparing-to-install-on-bare-metal.adoc b/installing/installing_bare_metal/preparing-to-install-on-bare-metal.adoc
index 3b65d9a71015..67dec0d7c8e3 100644
--- a/installing/installing_bare_metal/preparing-to-install-on-bare-metal.adoc
+++ b/installing/installing_bare_metal/preparing-to-install-on-bare-metal.adoc
@@ -11,6 +11,7 @@ toc::[]
 
 * You reviewed details about the xref:../../architecture/architecture-installation.adoc#architecture-installation[{product-title} installation and update] processes.
 * You have read the documentation on xref:../../installing/installing-preparing.adoc#installing-preparing[selecting a cluster installation method and preparing it for users].
+include::snippets/installing-subnet-requirements.adoc[]
 
 [id="choosing-a-method-to-install-ocp-on-bare-metal"]
 == Choosing a method to install {product-title} on bare metal
diff --git a/installing/installing_vsphere/preparing-to-install-on-vsphere.adoc b/installing/installing_vsphere/preparing-to-install-on-vsphere.adoc
index e2af3963aa4d..eeee087000f9 100644
--- a/installing/installing_vsphere/preparing-to-install-on-vsphere.adoc
+++ b/installing/installing_vsphere/preparing-to-install-on-vsphere.adoc
@@ -17,6 +17,7 @@ toc::[]
 * If you use a firewall and plan to use Telemetry, you
 xref:../../installing/install_config/configuring-firewall.adoc#configuring-firewall[configured the firewall to allow the sites] required by your cluster.
 
+include::snippets/installing-subnet-requirements.adoc[]
 
 [id="choosing-a-method-to-install-ocp-on-vsphere"]
 == Choosing a method to install {product-title} on vSphere
diff --git a/snippets/installing-subnet-requirements.adoc b/snippets/installing-subnet-requirements.adoc
new file mode 100644
index 000000000000..a1fc5b1a9862
--- /dev/null
+++ b/snippets/installing-subnet-requirements.adoc
@@ -0,0 +1,8 @@
+// Text snippet included in the following assemblies:
+//
+// * installing/installing_vsphere/installing-vsphere.adoc
+// * installing/installing_bare_metal/installing-bare_metal.adoc
+
+:_content-type: SNIPPET
+
+* If you are using network multicast, you ensured no other {product-title} cluster is already running on the L2 subnet assigned to this cluster. Installing clusters on separate subnets prevents broadcast storms and Virtual Router Identifier (VRID) conflicts.
\ No newline at end of file