Azure Virtual Network Skill

This skill provides expert guidance for Azure Virtual Network. Covers troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, and deployment. It combines local quick-reference content with remote documentation fetching capabilities.

How to Use This Skill

> IMPORTANT for Agent: Use the Category Index below to locate relevant sections. For categories with line ranges (e.g., L35-L120), use read_file with the specified lines. For categories with file links (e.g., [security.md](security.md)), use read_file on the linked reference file

> IMPORTANT for Agent: If metadata.generated_at is more than 3 months old, suggest the user pull the latest version from the repository. If mcp_microsoftdocs tools are not available, suggest the user install it: Installation Guide

This skill requires network access to fetch documentation content:

• Preferred: Use mcp_microsoftdocs:microsoft_docs_fetch with query string from=learn-agent-skill. Returns Markdown.
• Fallback: Use fetch_webpage with query string from=learn-agent-skill&accept=text/markdown. Returns Markdown.

Category Index

| Category | Lines | Description | |----------|-------|-------------| | Troubleshooting | L36-L40 | Configuring, validating, and debugging Azure routing appliances (NVA/virtual routers), including routing setup, traffic flow issues, and common misconfiguration fixes. | | Best Practices | L41-L50 | Designing secure, high-performance VNets: outbound VM access control, NSG rules/flows, VM throughput tuning, TCP/IP optimization, and secure use of VNet service endpoints. | | Decision Making | L51-L60 | Guidance on performance and cost trade-offs: MANA support, Accelerated Networking, routing preference, public IP upgrades, VNet cost optimization, and VNet integration for service isolation. | | Architecture & Design Patterns | L61-L67 | Designing VNet architectures: subnet extension for migrations, VNet peering, hybrid two-tier apps, traffic mirroring with TAP, topology planning, and custom routing options. | | Limits & Quotas | L68-L75 | Network resource limits and behaviors for Azure VMs/VNets: accelerated networking support, public IP quotas, VM throughput caps, and Virtual Network scale/performance constraints. | | Security | L76-L84 | Securing virtual networks: Kubernetes network policies, NSG/policy-based controls, VNet encryption, and restricting storage egress with service endpoint policies. | | Configuration | L85-L119 | Configuring Azure virtual networks: IPs (public/private/custom), gateways, MTU, DNS, DHCP, monitoring, subnet delegation/peering, encryption, and Azure CNI/network adapters. | | Deployment | L120-L123 | Guidance for upgrading Azure Basic public IP addresses to Standard SKU, including requirements, steps, and considerations for network resources and downtime. |

Troubleshooting

| Topic | URL | |-------|-----| | Configure and troubleshoot Azure routing appliances | https://learn.microsoft.com/en-us/azure/virtual-network/how-to-create-virtual-network-routing-appliance |

Best Practices

| Topic | URL | |-------|-----| | Apply Azure Virtual Network design best practices | https://learn.microsoft.com/en-us/azure/virtual-network/concepts-and-best-practices | | Understand and control default outbound access for Azure VMs | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/default-outbound-access | | Configure Azure NSG rules and traffic processing | https://learn.microsoft.com/en-us/azure/virtual-network/network-security-group-how-it-works | | Optimize Azure VM network throughput settings | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-optimize-network-bandwidth | | Implement Azure virtual network service endpoints securely | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-service-endpoints-overview | | Apply TCP/IP performance tuning on Azure VMs | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-tcpip-performance-tuning |

Decision Making

| Topic | URL | |-------|-----| | Decide MANA support for existing Azure VM sizes | https://learn.microsoft.com/en-us/azure/virtual-network/accelerated-networking-mana-existing-sizes | | Plan and execute upgrade from Basic to Standard public IPs | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/public-ip-basic-upgrade-guidance | | Choose Azure routing preference via Microsoft or ISP network | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/routing-preference-overview | | Use routing preference unmetered for Azure-to-CDN traffic | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/routing-preference-unmetered | | Optimize Azure Virtual Network costs and trade-offs | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-cost-optimization | | Choose Azure VNet integration options for service isolation | https://learn.microsoft.com/en-us/azure/virtual-network/vnet-integration-for-azure-services |

Architecture & Design Patterns

| Topic | URL | |-------|-----| | Design subnet extension strategies for Azure migrations | https://learn.microsoft.com/en-us/azure/virtual-network/subnet-extension | | Implement hybrid two-tier application with Azure VNets | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-scenario-udr-gw-nva | | Plan Azure virtual network topology and connectivity | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-vnet-plan-design-arm |

Limits & Quotas

| Topic | URL | |-------|-----| | Understand limits and support for Azure Accelerated Networking | https://learn.microsoft.com/en-us/azure/virtual-network/accelerated-networking-overview | | Create Azure VM with static public IP and understand IP limits | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/virtual-network-static-public-ip | | Understand Azure VM network throughput limits | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-machine-network-throughput | | Understand Azure Virtual Network limits and behaviors | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-faq |

Security

| Topic | URL | |-------|-----| | Configure Kubernetes network policies on Azure | https://learn.microsoft.com/en-us/azure/virtual-network/kubernetes-network-policies | | Apply security controls to Azure Virtual Network deployments | https://learn.microsoft.com/en-us/azure/virtual-network/secure-virtual-network | | Apply Azure Policy compliance controls to Virtual Network | https://learn.microsoft.com/en-us/azure/virtual-network/security-controls-policy | | Configure and manage Azure Virtual Network encryption | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-encryption-faq | | Secure Azure Storage egress with service endpoint policies | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-service-endpoint-policies-overview |

Configuration

| Topic | URL | |-------|-----| | Enable Microsoft Azure Network Adapter on Linux VMs | https://learn.microsoft.com/en-us/azure/virtual-network/accelerated-networking-mana-linux | | Configure MANA behavior for NVAs on existing VM sizes | https://learn.microsoft.com/en-us/azure/virtual-network/accelerated-networking-mana-network-virtual-appliance-opt-out | | Configure Azure CNI for Kubernetes virtual networks | https://learn.microsoft.com/en-us/azure/virtual-network/deploy-container-networking | | Install and configure Azure CNI on Linux Docker hosts | https://learn.microsoft.com/en-us/azure/virtual-network/deploy-container-networking-docker-linux | | Configure advertised gateway prefixes for hub VNets | https://learn.microsoft.com/en-us/azure/virtual-network/how-to-advertised-gateway-prefixes | | Configure subnet peering in Azure virtual networks | https://learn.microsoft.com/en-us/azure/virtual-network/how-to-configure-subnet-peering | | Create and configure an encrypted Azure virtual network | https://learn.microsoft.com/en-us/azure/virtual-network/how-to-create-encryption | | Deploy a DHCP server VM for on-premises clients | https://learn.microsoft.com/en-us/azure/virtual-network/how-to-dhcp-azure | | Configure MTU settings for Azure virtual machines | https://learn.microsoft.com/en-us/azure/virtual-network/how-to-virtual-machine-mtu | | Configure public IP addresses for Azure Application Gateway frontends | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/configure-public-ip-application-gateway | | Configure public IP addresses for Azure Firewall deployments | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/configure-public-ip-firewall | | Configure public IP usage with Azure Load Balancer | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/configure-public-ip-load-balancer | | Configure public IPs with Azure NAT Gateway for outbound SNAT | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/configure-public-ip-nat-gateway | | Manage public IP addresses for Azure Virtual Machines | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/configure-public-ip-vm | | Configure public IP addresses for Azure VPN gateways | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/configure-public-ip-vpn-gateway | | Onboard and configure custom IPv6 address prefixes in Azure | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/create-custom-ip-address-prefix-ipv6-portal | | Onboard and configure custom IPv4 address prefixes in Azure | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/create-custom-ip-address-prefix-portal | | Manage Azure custom IP address prefixes and migrations | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/manage-custom-ip-address-prefix | | Create and manage Azure public IP address prefixes | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/manage-public-ip-address-prefix | | Configure monitoring and alerts for Azure Public IP addresses | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/monitor-public-ip | | Use Azure Monitor metrics for Public IP addresses | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/monitor-public-ip-reference | | Configure Azure public IP address prefixes and zones | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/public-ip-address-prefix | | Configure private and public IPs on Azure network interfaces | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/virtual-network-network-interface-addresses | | Create and manage Azure public IP address resources | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/virtual-network-public-ip-address | | Configure monitoring for Azure Virtual Network with Azure Monitor | https://learn.microsoft.com/en-us/azure/virtual-network/monitor-virtual-network | | Reference for Azure Virtual Network monitoring data | https://learn.microsoft.com/en-us/azure/virtual-network/monitor-virtual-network-reference | | Use built-in Azure Policy definitions for Virtual Network | https://learn.microsoft.com/en-us/azure/virtual-network/policy-reference | | Configure subnet delegation for Azure PaaS services | https://learn.microsoft.com/en-us/azure/virtual-network/subnet-delegation-overview | | Set up dynamic DNS registration for Azure VMs | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-name-resolution-ddns | | Configure DNS name resolution for Azure virtual networks | https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-name-resolution-for-vms-and-role-instances | | Understand and configure Azure IP 168.63.129.16 usage | https://learn.microsoft.com/en-us/azure/virtual-network/what-is-ip-address-168-63-129-16 |

Deployment

| Topic | URL | |-------|-----| | Upgrade Azure Basic public IPs to Standard SKU | https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/public-ip-upgrade |