Removes "optional" and places the last sentence into an Important admonishment block.

Signed-off-by: John Wilkins <[email protected]>

Author: johnwilkins

modules/ipi-install-configure-network-components-to-run-on-the-control-plane.adoc

@@ -4,9 +4,14 @@
 
 :_content-type: PROCEDURE
 [id='configure-network-components-to-run-on-the-control-plane_{context}']
-= Optional: Configuring network components to run on the control plane
+= Configuring network components to run on the control plane
 
-You can configure networking components to run exclusively on the control plane nodes. By default, {product-title} allows any node in the machine config pool to host the `ingressVIP` virtual IP address. However, some environments deploy worker nodes in separate subnets from the control plane nodes. When deploying remote workers in separate subnets, you must place the `ingressVIP` virtual IP address exclusively with the control plane nodes.
+You can configure networking components to run exclusively on the control plane nodes. By default, {product-title} allows any node in the machine config pool to host the `ingressVIP` virtual IP address. However, some environments deploy worker nodes in separate subnets from the control plane nodes, which requires configuring the `ingressVIP` virtual IP address to run on the control plane nodes. 
+
+[IMPORTANT]
+====
+When deploying remote workers in separate subnets, you must place the `ingressVIP` virtual IP address exclusively with the control plane nodes.
+====
 
 image::161_OpenShift_Baremetal_IPI_Deployment_updates_0521.svg[Installer-provisioned networking]