You have an SAP production landscape on-premises and an SAP development landscape on Azure. You deploy a network virtual appliance to act as a…

The goal is to ensure the network virtual appliance (NVA), which acts as a firewall, is not a single point of failure. Deploying an Azure Standard Load Balancer is a necessary component for an NVA high-availability (HA) architecture, but it is insufficient on its own. A complete solution requires deploying at least two NVA instances, placing them in the load balancer's backend pool, and configuring User-Defined Routes (UDRs) to direct traffic to the load balancer's frontend IP address. Since the proposed solution is incomplete and does not, by itself, provide high availability for the single NVA, it does not meet the goal.

A. Yes: This is incorrect because deploying only a load balancer without multiple NVAs in its backend pool and correctly configured routing does not create a highly available firewall solution.

1. Microsoft Azure Documentation

Reference Architectures

"Highly available network virtual appliances." This document explicitly details the required architecture for NVA high availability. It states

"To make the NVAs highly available

deploy them behind an Azure Load Balancer." The accompanying diagrams and text clarify that this involves multiple NVA virtual machines

an internal Standard Load Balancer

and User-Defined Routes pointing to the load balancer's frontend IP. The deployment of the load balancer is just one part of the overall solution.

Source: https://learn.microsoft.com/en-us/azure/architecture/reference-architectures/dmz/nva-ha

Section: "Architecture".

2. Microsoft Azure Documentation

"What is Azure Load Balancer?"

"High availability ports overview." This document explains the HA Ports feature of the Standard Load Balancer

which is specifically designed for scenarios like NVA high availability. It clarifies that the feature works by distributing flows to a pool of backend instances (i.e.

multiple NVAs)

which is essential for failover. A single NVA with a load balancer provides no HA.

Source: https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-ha-ports-overview

Section: "NVA high availability".

3. Microsoft Azure Documentation

"SAP workload on Azure: planning and deployment checklist." In the networking section

for ensuring resilient connectivity

the guidance points towards using highly available NVAs. The implementation links back to the standard architecture requiring multiple NVAs fronted by a load balancer.

Source: https://learn.microsoft.com/en-us/azure/sap/workloads/deployment-checklist

Section: "Networking".