DOCS-9655: tweaks to ec2 recommendations

Author: schmalliso

source/administration/production-notes.txt

@@ -399,10 +399,9 @@ WiredTiger may store data in swap space.
 RAID
 ````
 
-Most MongoDB deployments should use disks backed by RAID-10.
-
-RAID-5 and RAID-6 do not typically provide sufficient performance to
-support a MongoDB deployment.
+For optimal performance in terms of the storage layer, use disks
+backed by RAID-10. RAID-5 and RAID-6 do not typically provide
+sufficient performance to support a MongoDB deployment.
 
 Avoid RAID-0 with MongoDB deployments. While RAID-0 provides good write
 performance, it also provides limited availability and can lead to
@@ -743,6 +742,13 @@ integration with Amazon Web Services (AWS) and lets you deploy new EC2
 instances directly from |MMS|. See :mms-docs:`Configure AWS Integration
 </tutorial/configure-aws-settings/>` for more details.
 
+When available, enable AWS's `Enhanced Networking
+<http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html#enabling_enhanced_networking>`_ 
+for your instance. Not all instance types support Enhanced Networking.
+Refer to the `AWS documentation
+<http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html#enabling_enhanced_networking>`_
+for more information. 
+
 .. _windows-azure-production-notes:
 
 Azure