Merge pull request #113069 from jluk/master

fix system pool & outboundtype clarification

Author: PRMerger9

articles/aks/egress-outboundtype.md

@@ -71,7 +71,7 @@ Below is a network topology deployed in AKS clusters by default, which use an `o
 
 If `userDefinedRouting` is set, AKS will not automatically configure egress paths. The following is expected to be done by **the user**.
 
-Cluster must be deployed into an existing virtual network with a subnet that has been configured. A valid user-defined route (UDR) must exist on the subnet with outbound connectivity.
+The AKS cluster must be deployed into an existing virtual network with a subnet that has been configured. When using standard load balancer (SLB) architecture you must establish explicit egress. This requires sending egress requests to an appliance such as a firewall, gateway, on-prem or to allow the egress to be done by a public IP assigned to the standard load balancer or a given node.
 
 The AKS resource provider will deploy a standard load balancer (SLB). The load balancer is not configured with any rules and [does not incur a charge until a rule is placed](https://azure.microsoft.com/pricing/details/load-balancer/). AKS will **not** automatically provision a public IP address for the SLB frontend. AKS will **not** automatically configure the load balancer backend pool.
 

articles/aks/use-system-pools.md

@@ -3,7 +3,7 @@ title: Use system node pools in Azure Kubernetes Service (AKS)
 description: Learn how to create and manage system node pools in Azure Kubernetes Service (AKS)
 services: container-service
 ms.topic: article
-ms.date: 04/06/2020
+ms.date: 04/28/2020
 
 ---
 
@@ -25,6 +25,8 @@ The following limitations apply when you create and manage AKS clusters that sup
 * See [Quotas, virtual machine size restrictions, and region availability in Azure Kubernetes Service (AKS)][quotas-skus-regions].
 * The AKS cluster must be built with virtual machine scale sets as the VM type.
 * The name of a node pool may only contain lowercase alphanumeric characters and must begin with a lowercase letter. For Linux node pools, the length must be between 1 and 12 characters. For Windows node pools, the length must be between 1 and 6 characters.
+* An API version of 2020-03-01 or greater must be used to set a node pool mode.
+* The mode of a node pool is a required property and must be explicitly set when using ARM templates or direct API calls.
 
 ## System and user node pools