Update

Author: sethmanheim

AKS-Hybrid/aks-hci-ip-address-planning.md

@@ -9,7 +9,7 @@ ms.reviewer: abha
 ms.lastreviewed: 10/08/2024
 ---
 
-# AKS enabled by Azure Arc IP address planning requirements
+# IP address planning requirements
 
 [!INCLUDE [hci-applies-to-23h2](includes/hci-applies-to-23h2.md)]
 
@@ -91,6 +91,8 @@ Sharing a logical network between AKS and Arc VMs on Azure Local offers the bene
 
 ## IP address range allocation for pod CIDR and service CIDR
 
+This section describes the IP address ranges used by Kubernetes for pod and service communication within a cluster. These IP address ranges are defined during the AKS cluster creation process and are used to assign unique IP addresses to pods and services within the cluster.
+
 ### Pod network CIDR
 
 Pod network CIDR is a range of IP addresses used by Kubernetes to assign unique IP addresses to the individual pods running within a Kubernetes cluster. Each pod gets its own IP address within this range, allowing pods to communicate with each other and with services within the cluster. In AKS, pod IP addresses are assigned via *Calico CNI in VXLAN mode*. Calico VXLAN helps create *Overlay networks*, where the IP addresses of pods (from the pod network CIDR) are virtualized and tunneled through the physical network. In this mode, each pod is assigned an IP address from the pod network CIDR, but this IP address is not directly routable on the physical network. Instead, it is encapsulated within the network packets and sent through the underlying physical network to reach its destination pod on another node.