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azure-load-balancer

Expert knowledge for Azure Load Balancer development including troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. Use when configuring backend pools/rules, SNAT/outbound, dual-stack IPv4/IPv6, health probes, or LB metrics/APIs, and other Azure Load Balancer related development tasks. Not for Azure Application Gateway (use azure-application-gateway), Azure Front Door (use azure-front-door), Azure Traffic Manager (use azure-traffic-manager), Azure Virtual Network (use azure-virtual-network).

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SKILL.md（原文）

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Azure Load Balancer Skill

This skill provides expert guidance for Azure Load Balancer. Covers troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, 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	L37-L44	Diagnosing and fixing Azure Load Balancer issues: health event logs, monitoring/alerts, connectivity problems, and testing public frontend reachability.
Best Practices	L45-L50	Designing and deploying Azure Load Balancer and VM scale set architectures for reliability, performance, scaling, health probes, and high availability best practices.
Decision Making	L51-L57	Guidance on choosing the right Load Balancer SKU, upgrading from Basic to Standard, and migrating workloads from AWS Network Load Balancer to Azure.
Architecture & Design Patterns	L58-L62	Design patterns for traffic distribution and session affinity, plus guidance for configuring outbound internet connectivity and SNAT behavior with Azure Load Balancer.
Limits & Quotas	L63-L70	Limits, behaviors, and configuration of Load Balancer TCP idle timeouts, TCP resets, and outbound SNAT connection quotas for inbound and outbound traffic.
Security	L71-L76	Security guidance for Azure Load Balancer: hardening, access controls, and using Azure DDoS Protection to defend against volumetric and network attacks.
Configuration	L77-L93	Configuring Azure Load Balancer behavior: backend pools (incl. cross-subscription), rules/NAT, health probes, SNAT outbound, IPv6 DHCPv6, portal settings, and monitoring/metrics/logs.
Integrations & Coding Patterns	L94-L100	Code samples and patterns for probing health, reading load balancer/VM metadata via IMDS, and retrieving Azure Load Balancer metrics using CLI and REST APIs
Deployment	L101-L108	Deploying and migrating Azure Load Balancers: dual-stack IPv4/IPv6 setups (internal/external), automating Basic→Standard upgrades, NAT rule v1→v2 migration, and cross-region config replication.

Troubleshooting

Topic	URL
Interpret Azure Load Balancer health event logs	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-health-event-logs
Monitor and alert on Azure Load Balancer health events	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-monitor-alert-health-event-logs
Diagnose and troubleshoot Azure Load Balancer connectivity	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-standard-diagnostics
Test Azure Public Load Balancer frontend reachability	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-test-frontend-reachability

Best Practices

Topic	URL
Apply Azure Load Balancer deployment best practices	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-best-practices
Use VM scale sets with Azure Standard Load Balancer effectively	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-standard-virtual-machine-scale-sets

Decision Making

Topic	URL
Plan and execute upgrade from Basic to Standard Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-basic-upgrade-guidance
Migrate AWS Network Load Balancer workloads to Azure	https://learn.microsoft.com/en-us/azure/load-balancer/network-load-balancing-aws-to-azure-how-to
Choose the right Azure Load Balancer SKU	https://learn.microsoft.com/en-us/azure/load-balancer/skus

Architecture & Design Patterns

Topic	URL
Choose Azure Load Balancer distribution modes	https://learn.microsoft.com/en-us/azure/load-balancer/distribution-mode-concepts

Limits & Quotas

Topic	URL
Azure Load Balancer FAQs with limits and behaviors	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-faqs
Configure TCP idle timeout and reset for Azure Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-tcp-idle-timeout
Understand TCP reset and idle timeout behavior in Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-tcp-reset
Configure outbound SNAT limits for Azure Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/outbound-rules

Security

Topic	URL
Apply security best practices to Azure Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/secure-load-balancer
Protect Azure Load Balancer with Azure DDoS Protection	https://learn.microsoft.com/en-us/azure/load-balancer/tutorial-protect-load-balancer-ddos

Configuration

Topic	URL
Configure backend pools for Azure Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/backend-pool-management
Configure cross-subscription backends for Azure Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/cross-subscription-how-to-attach-backend
Configure Azure Load Balancer health probes	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-custom-probe-overview
Configure Azure Load Balancer traffic distribution mode	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-distribution-mode
Configure DHCPv6 on Linux VMs for Azure IPv6	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-ipv6-for-linux
Configure SNAT-based outbound connectivity with Azure Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-outbound-connections
Configure Azure Load Balancer portal settings	https://learn.microsoft.com/en-us/azure/load-balancer/manage
Manage Azure Load Balancer backend admin state	https://learn.microsoft.com/en-us/azure/load-balancer/manage-admin-state-how-to
Configure and manage Azure Load Balancer inbound NAT rules	https://learn.microsoft.com/en-us/azure/load-balancer/manage-inbound-nat-rules
Manage Azure Load Balancer health probes in the portal	https://learn.microsoft.com/en-us/azure/load-balancer/manage-probes-how-to
Configure and manage Azure Load Balancer rules	https://learn.microsoft.com/en-us/azure/load-balancer/manage-rules-how-to
Configure monitoring for Azure Load Balancer with Azure Monitor	https://learn.microsoft.com/en-us/azure/load-balancer/monitor-load-balancer
Reference monitoring metrics and logs for Azure Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/monitor-load-balancer-reference

Integrations & Coding Patterns

Topic	URL
Implement custom HTTP/HTTPS health probes with Python for Azure Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/create-custom-http-health-probe-howto
Use IMDS to retrieve Azure Load Balancer metadata	https://learn.microsoft.com/en-us/azure/load-balancer/howto-load-balancer-imds
Query Azure Load Balancer metrics via REST API	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-query-metrics-rest-api

Deployment

Topic	URL
Deploy IPv4/IPv6 dual stack app with Standard Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/deploy-ipv4-ipv6-dual-stack-standard-load-balancer
Deploy IPv6 dual stack app with Standard Internal Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/ipv6-dual-stack-standard-internal-load-balancer-powershell
Migrate inbound NAT rules v1 to v2 in Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-nat-pool-migration
Replicate Azure Load Balancer configuration across regions	https://learn.microsoft.com/en-us/azure/load-balancer/move-across-regions-azure-load-balancer
Automate Basic-to-Standard Load Balancer upgrade with PowerShell	https://learn.microsoft.com/en-us/azure/load-balancer/upgrade-basic-standard-with-powershell

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