Traffic Manager

Traffic Manager is a DNS based traffic load balancing service

Overview

• Traffic manager is a global service. You do not select a region when you deploy it.
• Traffic Manager uses DNS to direct client requests to the most appropriate service endpoint based on a traffic-routing method and the health of the endpoints.
• Traffic Manager can improve the availability and responsiveness of your application.
• Traffic Manager can be used to:
  • Load balance incoming traffic across multiple Azure regions
  • Route traffic to a specific region based on the client’s geographic location
  • Route traffic to a specific region based on the endpoint’s health
  • Route traffic to a specific region based on the endpoint’s performance
• Traffic Manager supports multiple DNS routing methods, including:
  • Priority
  • Weighted
  • Performance
  • Geographic
  • Multi-value
• Traffic Manager can be used with Azure services, external services, and on-premises services. The endpoint must be public.
  • Traffic Manager does not support routing to private IP addresses.

Endpoint types:

• Azure Endpoint:
  • Cloud Service, Web App, Public IP
• External Endpoint
• Nested TM Profile

Traffic Routing Methods

• Priority Routing Method
  • Traffic Manager directs traffic to the primary endpoint. If the primary endpoint is unavailable, Traffic Manager fails over to the secondary endpoint.
• Performance Routing Method
  • Traffic Manager directs traffic to the endpoint with the lowest latency.
• Geographic Routing Method
  • Traffic Manager directs traffic to the endpoint based on the geographic location of the client (where the DNS query originates from).
• Subnet Routing Method
  • Traffic Manager directs traffic to the endpoint based on the IP address of the client.
• Weighted Routing Method
  • Traffic Manager distributes traffic across multiple endpoints based on a user-defined weight.
• Multi-value Routing Method
  • Traffic Manager returns multiple endpoints in the DNS response, and the client selects one.