Load Balancer documentation

Learn how to use Azure Load Balancer to efficiently distribute traffic and improve application scalability. Explore quickstarts, tutorials, and how-to guides for deploying load balancers in virtual machines, cloud resources, and cross-premises networks.

• Load Balancer documentation
• Overview
  • What is Azure Load Balancer?
• Quickstarts
  • Create a public load balancer
    • Portal
    • PowerShell
    • CLI
    • Bicep
    • ARM template
    • Terraform
  • Create an internal load balancer
    • Portal
    • PowerShell
    • CLI
    • Bicep
    • ARM template
    • Terraform
• Tutorials
  • Inbound NAT rule
    • Create a single VM inbound NAT rule
    • Create a multiple VMs inbound NAT rule
    • Migrate Inbound NAT Pools to NAT Rules
  • Scaling and availability
    • Load balance a VM within a specific availability zone
    • Load balance VMs with multiple availability sets
  • Cross-region load balancer
    • Create cross-region load balancer - Portal
    • Deploy cross-region load balancer - ARM template
  • Gateway load balancer
    • Create gateway load balancer - Portal
    • Create gateway load balancer - PowerShell
    • Create gateway load balancer - Azure CLI
    • Deploy a dual-stack gateway load balancer
    • Configure outbound connectivity with a gateway load balancer
  • NAT gateway
    • Integrate NAT gateway public load balancer
    • Integrate NAT gateway internal load balancer
  • IP-based backend
    • Create a public load balancer with an IP-based backend - Portal
  • Deploy public load balancer with DDoS protection
• Concepts
  • What's new?
  • Portal settings
  • Components
  • Load balancing algorithm
  • Distribution modes
  • Health probes
  • Cross-subscription load balancer
  • Cross-region load balancer
  • Administrative state
  • Reliability
    • Availability zones and cross-region load balancer
    • Availability zone migration
  • Gateway load balancer
    • Overview
    • Partners
  • SKUs
  • Standard Load Balancer and Virtual Machine Scale Sets
  • Retrieve information using the Azure Instance Metadata Service
  • Health monitoring
    • Monitor Load Balancer
    • Monitoring data reference
    • Azure Monitor Insights for Load Balancer
    • Standard Load Balancer metrics and diagnostics
    • Load Balancer Health Event Logs
    • Manage Load Balancer health status
  • Inbound connectivity
    • Inbound NAT rules
    • High Availability ports
    • Multiple frontends
    • TCP reset on idle timeout
  • Outbound connectivity
    • SNAT for outbound connections to internet
    • Configuring outbound rules
  • Security
    • Security baseline
• How-to
  • Backend Pool management
  • Retrieve metadata using the Azure IMDS
  • Manage admin state
  • Health probes
    • Manage health probes
    • Create a custom HTTP/HTTPS health probe
  • Load Balancer metrics and logs
    • Get Load Balancer metrics with Azure Monitor CLI
    • Get Load Balancer metrics with REST
    • Monitor and alert with LoadBalancerHealthEvent logs
  • Inbound connectivity
    • Floating IP configuration
    • Manage load balancer rules
    • Manage inbound NAT rules
    • Configure TCP reset and idle timeout
    • Configure distribution mode for Load Balancer
  • Outbound connectivity
    • Migrate outbound access
    • Outbound only load balancer configuration
  • Virtual machine scale sets
    • Configure inbound NAT rules for Virtual Machine Scale Sets
    • Add multiple Virtual Machine Scale Set instances behind one Azure Load Balancer
    • Use Virtual Machine Scale Set instance with an existing Azure Load Balancer
  • Upgrade from a basic to standard load balancer
    • Upgrade options and guidance
    • Upgrade from Basic to Standard with PowerShell
  • Using multiple IP configurations
    • Azure portal
    • Azure CLI
    • Azure PowerShell
  • Move a load balancer across regions
  • Cross-subscription load balancing
    • Attach a cross-subscription backend to an Azure Load Balancer
    • Attach a cross-subscription frontend to an Azure Load Balancer
    • Create a global load balancer with cross-subscription backends
    • Create a cross-subscription internal load balancer
  • IPv6
    • Configure DHCPv6 for Linux VMs
    • Public Load Balancer
      • Standard Public Load Balancer with IPv6 - PowerShell
      • Standard Public Load Balancer with IPv6 - Azure CLI
      • Standard Public Load Balancer with IPv6 - ARM template
    • Internal Load Balancer
      • Standard Internal Load Balancer with IPv6 - PowerShell
    • Add IPv6 to existing deployments
      • Add IPv6 to an IPv4 application- PowerShell
      • Add IPv6 to an IPv4 application - Azure CLI
  • Troubleshoot
    • Troubleshoot Azure Load Balancer
    • Testing inbound frontend IP address reachability
    • Health Probe status
    • Backend pool VM traffic
    • Troubleshoot SNAT exhaustion and connection timeouts
    • Resource health and inbound availability issues
    • Common error codes for Azure Instance Metadata Service IMDS
    • Common deployment errors
    • Troubleshoot load balancer health event logs
• Reference
  • Code samples
  • Azure PowerShell
  • Azure CLI
  • .NET
  • Java
  • Node.js
  • Ruby
  • Python
  • REST
  • Resource Manager template
• Resources
  • Build your skills with Microsoft Learn training
  • Azure Roadmap
  • Azure Load Balancer feedback
  • Pricing
  • Pricing calculator
  • Product updates
  • FAQ