Update Windows docs networking.md (#511)

Add documentation regarding potential IPv4 resource exhaustion scenario

content/windows/docs/networking.md

@@ -71,6 +71,12 @@ DSR enablement can be verified following the instructions in the [Microsoft Netw
 
 ![](./images/dsr.png)
 
+If preserving your available IPv4 addresses and minimizing wastage is crucial for your subnet, it is generally recommended to avoid using prefix delegation mode as mentioned in [Prefix Mode for Windows - When to avoid](../../networking/prefix-mode/index_windows.md#avoid-prefix-delegation-when). If using prefix delegation is still desired, you can take steps to optimize IPv4 address utilization in your subnet. See [Configuring Parameters for Prefix Delegation](../../networking/prefix-mode/index_windows.md#configure-parameters-for-prefix-delegation-to-conserve-ipv4-addresses) for detailed instructions on how to fine-tune the IPv4 address request and allocation process. Adjusting these configurations can help you strike a balance between conserving IPv4 addresses and pod density benefits of prefix delegation.
+
+When using the default setting of assigning secondary IPv4 addresses, there are currently no supported configurations to manipulate how the VPC Resource Controller requests and allocates IPv4 addresses. More specifically, `minimum-ip-target` and `warm-ip-target` are only supported for prefix delegation mode. Also take note that in secondary IP mode, depending on the available IP addresses on the interface, the VPC Resource Controller will typically allocate 3 unused IPv4 addresses on the node on your behalf to maintain warm IPs for faster pod startup times. If you would like to minimize IP wastage of unused warm IP addresses, you could aim to schedule more pods on a given Windows node such that you use as much IP address capacity of the ENI as possible. More explicitly, you could avoid having warm unused IPs if all IP addresses on the ENI are already in use by the node and running pods. Another workaround to help you resolve constraints with IP address availability in your subnet(s) could be to explore [increasing your subnet size](https://docs.aws.amazon.com/vpc/latest/userguide/modify-subnets.html) or separating your Windows nodes into their own dedicated subnets.
+
+Additionally, it's important to note that IPv6 is not supported on Windows nodes at the moment.
+
 ## Container Network Interface (CNI) options
 The AWSVPC CNI is the de facto CNI plugin for Windows and Linux worker nodes. While the AWSVPC CNI satisfies the needs of many customers, still there may be times when you need to consider alternatives like an overlay network to avoid IP exhaustion. In these cases, the Calico CNI can be used in place of the AWSVPC CNI. [Project Calico](https://www.projectcalico.org/) is open source software that was developed by [Tigera](https://www.tigera.io/). That software includes a CNI that works with EKS. Instructions for installing Calico CNI in EKS can be found on the [Project Calico EKS installation](https://docs.projectcalico.org/getting-started/kubernetes/managed-public-cloud/eks) page.