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: deployment errors, health events/logs, probes, connectivity/backend traffic, SNAT/timeouts, IMDS errors, and resource health/availability.
Best Practices	L45-L52	Guidance on deploying Azure Load Balancer with VM scale sets, configuring inbound NAT, and building custom HTTP/HTTPS health probes (Python) using recommended best practices.
Decision Making	L53-L60	Guidance on choosing the right Load Balancer SKU, upgrading Basic to Standard, migrating from AWS NLB, and moving from inbound NAT rules v1 to v2.
Architecture & Design Patterns	L61-L66	Design patterns for traffic distribution and session affinity, plus guidance for configuring outbound internet connectivity and SNAT behavior with Azure Load Balancer.
Limits & Quotas	L67-L73	Load Balancer connection limits, SNAT/port behaviors, TCP idle timeout configuration, and how/when TCP resets occur for troubleshooting connectivity issues.
Security	L74-L79	Securing Azure Load Balancer with NSGs and other controls, and enabling/configuring Azure DDoS Protection to defend against volumetric and protocol attacks.
Configuration	L80-L100	Configuring Azure Load Balancer behavior: backends/frontends (incl. cross-subscription, IP-based, outbound-only), rules, health probes, traffic distribution, monitoring, and SNAT outbound rules.
Integrations & Coding Patterns	L101-L108	Using IMDS, Azure Monitor CLI, and REST APIs to query load balancer/VM IPs, retrieve metadata, and collect/load metrics for integration and automation.
Deployment	L109-L113	Guides for deploying Load Balancers: replicating configurations across regions and automating upgrades from Basic to Standard using PowerShell.

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 LoadBalancerHealthEvent logs	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-monitor-alert-health-event-logs
Use metrics, alerts, and health to diagnose Azure Load Balancer	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
Configure inbound NAT rules for VM scale sets	https://learn.microsoft.com/en-us/azure/load-balancer/configure-inbound-nat-rules-vm-scale-set
Implement custom HTTP/HTTPS health probes with Python	https://learn.microsoft.com/en-us/azure/load-balancer/create-custom-http-health-probe-howto
Apply Azure Load Balancer deployment best practices	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-best-practices
Use Azure Standard Load Balancer with virtual machine scale sets	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
Decide and migrate from inbound NAT rules v1 to v2	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-nat-pool-migration
Migrate AWS Network Load Balancer workloads to Azure Load Balancer	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
Design outbound internet connectivity with Azure Load Balancer SNAT	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-outbound-connections

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 Azure Load Balancer TCP idle timeout and reset	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-tcp-idle-timeout
Understand Azure Load Balancer TCP reset behavior	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-tcp-reset

Security

Topic	URL
Apply security controls 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 Azure Load Balancer backend pools by IP	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
Attach cross-subscription frontend IPs to Azure Load Balancer	https://learn.microsoft.com/en-us/azure/load-balancer/cross-subscription-how-to-attach-frontend
Create global load balancer with cross-subscription backends	https://learn.microsoft.com/en-us/azure/load-balancer/cross-subscription-how-to-global-backend
Configure cross-subscription internal Azure load balancer	https://learn.microsoft.com/en-us/azure/load-balancer/cross-subscription-how-to-internal-load-balancer
Configure outbound-only Azure Load Balancer with Bastion	https://learn.microsoft.com/en-us/azure/load-balancer/egress-only
Configure Azure Load Balancer health probe settings	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
Understand Azure Load Balancer portal configuration options	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
Configure Azure Load Balancer health probes	https://learn.microsoft.com/en-us/azure/load-balancer/manage-probes-how-to
Configure Azure Load Balancer rule types and properties	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
Configure outbound rules for Azure Load Balancer SNAT	https://learn.microsoft.com/en-us/azure/load-balancer/outbound-rules

Integrations & Coding Patterns

Topic	URL
Use IMDS to retrieve Azure Load Balancer metadata	https://learn.microsoft.com/en-us/azure/load-balancer/howto-load-balancer-imds
Query load balancer and VM IPs via IMDS	https://learn.microsoft.com/en-us/azure/load-balancer/instance-metadata-service-load-balancer
Retrieve Azure Load Balancer metrics using Azure Monitor CLI	https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-monitor-metrics-cli
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
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

Files1

1 files · 18.2 KB

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Overall Score

82/100

Grade

B

Good

Safety

90

Quality

82

Clarity

86

Completeness

75

Summary

This skill provides reference documentation and decision guidance for Azure Load Balancer, covering troubleshooting, best practices, architecture, security, and deployment. It functions as a knowledge index that directs agents to fetch detailed documentation from Microsoft Learn via network APIs rather than storing content locally. No file writes, shell execution, or dangerous operations are performed.

Detected Capabilities

network access for documentation fetchingremote content retrieval (mcp_microsoftdocs or fetch_webpage)read-only reference indexingknowledge directory with line-based navigation

Trigger Keywords

Phrases that MCP clients use to match this skill to user intent.

load balancer configurationazure nlb troubleshootingsnat timeout diagnosiscross-subscription backendshealth probe setupazure load balancer securitybasic to standard upgrade

Referenced Domains

External domains referenced in skill content, detected by static analysis.

github.comlearn.microsoft.com

Use Cases

Configure Azure Load Balancer rules, health probes, and backends
Diagnose and troubleshoot Load Balancer connectivity and SNAT issues
Design load balancing architecture with cross-subscription backends and traffic distribution
Migrate workloads from AWS NLB or upgrade from Basic to Standard SKU
Secure Load Balancer with NSG controls and DDoS protection
Query Load Balancer metrics and metadata via IMDS or Azure Monitor API
Configure outbound rules and session affinity for production deployments

Quality Notes

Well-structured Category Index with precise line ranges (L37-L44, etc.) enables efficient content navigation
Explicit instructions for tool selection (mcp_microsoftdocs preferred, fetch_webpage fallback) with fallback guidance
Clear scope boundaries: explicitly excludes Application Gateway, Front Door, and Traffic Manager
Comprehensive URL coverage across 8 functional categories (Troubleshooting, Best Practices, Decision Making, Architecture, Limits, Security, Configuration, Integrations, Deployment)
Useful versioning guidance: recommends pulling latest if generated_at > 3 months old
Installation guidance for mcp_microsoftdocs tool when unavailable
Compatible with agentskills.io specification with proper frontmatter fields (name, description, compatibility, metadata)

Model: claude-haiku-4-5-20251001Analyzed: Jun 26, 2026

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