Here are ten things network engineers working with Azure cloud infrastructure should know:

1. Use Azure Network Watcher for advanced troubleshooting: Azure Network Watcher provides tools like packet capture, topology visualization, and VPN troubleshooting to help diagnose and resolve complex networking issues.

2. Leverage Azure Traffic Manager for global load balancing: Azure Traffic Manager allows you to distribute traffic across multiple regions and ensure high availability and optimal performance for your applications.

3. Implement Azure Virtual WAN for large-scale branch connectivity: Azure Virtual WAN simplifies the setup and management of large-scale branch-to-branch and branch-to-Azure connectivity using a hub-and-spoke architecture.

4. Optimize costs with Azure Reserved Instances for networking services: By purchasing Azure Reserved Instances for networking services like Virtual Network Gateways and ExpressRoute, you can significantly reduce your long-term costs.

5. Use Azure Accelerated Networking for improved network performance: Enabling Azure Accelerated Networking on supported virtual machine sizes can greatly enhance network throughput and reduce latency.

6. Implement Azure Firewall for centralized network security: Azure Firewall provides a fully managed, cloud-native firewall service that helps protect your Azure Virtual Network resources from potential threats.

7. Leverage Azure Private Link for secure access to Azure PaaS services: Azure Private Link allows you to access Azure PaaS services and Azure-hosted customer-owned services over a private endpoint in your virtual network, ensuring secure and private connectivity.

8. Use Azure Network Security Groups (NSGs) for granular traffic control: NSGs allow you to define inbound and outbound security rules at the subnet and virtual machine level, providing a fine-grained control over network traffic.

9. Monitor and analyze network traffic with Azure Network Insights: Azure Network Insights provides a centralized view of network health, usage patterns, and performance metrics, helping you make data-driven decisions for your network infrastructure.

10. Automate network deployments with Azure Resource Manager (ARM) templates and Azure PowerShell/CLI: By leveraging ARM templates and scripting tools like Azure PowerShell and Azure CLI, you can automate the deployment and management of your networking resources, ensuring consistency and reducing manual effort.

These tips and tricks can help experienced network engineers optimize their Azure networking deployments, improve performance, enhance security, and reduce costs while increasing maintainability and scalability.