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.

• Azure Load Balancer
• Get started
  • What is Azure Load Balancer?
  • Gateway load balancer overview
  • Global load balancer overview
  • Cross-subscription load balancer overview
  • Choose a load balancing solution
  • Health probes
  • Administrative state
  • SKUs
  • Quickstarts
    • Create a public load balancer
    • Create an internal load balancer
  • FAQ
  • Load balancer best practices
  • What's new?
• Deploy
  • Portal settings
  • Components
  • Load balancing algorithm
  • Distribution modes
  • Public load balancer
    • Create a public load balancer
      • Portal
      • PowerShell
      • CLI
      • Bicep
      • ARM template
      • Terraform
      • Deploy public load balancer with DDoS protection
  • Internal load balancer
    • Create an internal load balancer
      • Portal
      • PowerShell
      • CLI
      • Bicep
      • ARM template
      • Terraform
  • Gateway load balancer
    • Partners
    • Create gateway load balancer
    • Deploy a dual-stack gateway load balancer
    • Configure outbound connectivity with a gateway load balancer
  • Global load balancer
    • Create a global load balancer
    • Deploy a global load balancer - ARM template
  • 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
  • NAT gateway integration
    • Integrate NAT gateway public load balancer
    • Integrate NAT gateway internal load balancer
  • Upgrade from a basic to standard load balancer
    • Upgrade options and guidance
    • Upgrade from Basic to Standard with PowerShell
  • Standard Load Balancer and Virtual Machine Scale Sets
  • IP-based backend
    • Create a public load balancer with an IP-based backend - Portal
• Connectivity
  • Inbound connectivity
    • Inbound NAT rule
      • Inbound NAT rules overview
      • Create a single VM inbound NAT rule
      • Create a multiple VMs inbound NAT rule
      • Manage inbound NAT rules
      • Migrate Inbound NAT Pools to NAT Rules
    • High Availability ports
    • Multiple frontends
    • TCP reset on idle timeout
    • Floating IP configuration
    • Manage load balancer rules
    • Configure TCP reset and idle timeout
    • Configure distribution mode for Load Balancer
  • Outbound connectivity
    • SNAT for outbound connections to internet
    • Configuring outbound rules
    • Migrate outbound access
    • Outbound only load balancer configuration
  • IPv6
    • Configure DHCPv6 for Linux VMs
    • Deploy a dual-stack Public load balancer
    • Deploy a dual-stack Internal load balancer
    • Add IPv6 to existing deployments
      • Add IPv6 to an IPv4 application- PowerShell
      • Add IPv6 to an IPv4 application - Azure CLI
• Manage and monitor
  • Backend Pool management
  • Retrieve metadata using the Azure IMDS
  • Manage admin state
  • Retrieve information using the Azure Instance Metadata Service
  • 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
  • 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
• 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
• Reliability and availability
  • Reliability
    • Availability zones and cross-region load balancer
    • Availability zone migration
  • Scaling and availability
    • Load balance a VM within a specific availability zone
    • Load balance VMs with multiple availability sets
  • 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
  • Using multiple IP configurations
  • Move a load balancer across regions
• Security and compliance
  • Deploy public load balancer with DDoS protection
  • Implement a secure hybrid networking
  • Security baseline
  • Azure Network security blog
• 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 Load Balancer feedback
  • Pricing
  • Pricing calculator
  • Product updates
  • Azure Network blog