Merge pull request #53330 from jboxman-rh/gh-49198

GH#49198: Add note about AWS and LibVirt

Author: jab-rh

modules/nw-network-config.adoc

@@ -31,6 +31,11 @@ For more information on these fields, refer to _Installation configuration param
 ====
 Set the `networking.machineNetwork` to match the CIDR that the preferred NIC resides in.
 ====
++
+[IMPORTANT]
+====
+The CIDR range `172.17.0.0/16` is reserved by libVirt. You cannot use this range or any range that overlaps with this range for any networks in your cluster.
+====
 
 Phase 2:: After creating the manifest files by running `openshift-install create manifests`, you can define a customized Cluster Network Operator manifest with only the fields you want to modify. You can use the manifest to specify advanced network configuration.