Merge pull request #291496 from b-ahibbard/udrs

update udr guidance

Author: prmerger-automator[bot]

articles/azure-netapp-files/azure-netapp-files-network-topologies.md

@@ -5,7 +5,7 @@ services: azure-netapp-files
 author: ram-kakani
 ms.service: azure-netapp-files
 ms.topic: conceptual
-ms.date: 05/10/2024
+ms.date: 12/05/2024
 ms.author: ramakk
 ms.custom: references_regions
 ---
@@ -111,7 +111,8 @@ Configuring UDRs on the source VM subnets with the address prefix of delegated s
 > To access an Azure NetApp Files volume from an on-premises network via a VNet gateway (ExpressRoute or VPN) and firewall, configure the route table assigned to the VNet gateway to include the `/32` IPv4 address of the Azure NetApp Files volume listed and point to the firewall as the next hop. Using an aggregate address space that includes the Azure NetApp Files volume IP address will not forward the Azure NetApp Files traffic to the firewall. 
 
 >[!NOTE]
->If you want to configure a UDR route in the VM VNet, to control the routing of packets destined for a regionally VNet-peered Azure NetApp Files standard volume, the UDR prefix must be more specific or equal to the delegated subnet size of the Azure NetApp Files volume. If the UDR prefix is of size greater than the delegated subnet size, it will not be effective. 
+> If you want to configure a route table (UDR route) to control the routing of packets through a network virtual alliance or firewall destined to an Azure NetApp Files standard volume from a source in the same VNet or a peered VNet, the UDR prefix must be more specific or equal to the delegated subnet size of the Azure NetApp Files volume. If the UDR prefix is less specific than the delegated subnet size, it isn't be effective. 
+> For example, if your delegated subnet is `x.x.x.x/24`, you must configured your UDR to `x.x.x.x/24` (equal) or `x.x.x.x/32` (more specific). If you configure the UDR route to be `x.x.x.x/16`, undefined behaviors such as asymmetric routing can cause a network drop at the firewall. 
 
 ## Azure native environments