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Routing Policies

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  3. AWS Certified Solutions Architect Professional (SAP-C02)
  5. Routing Policies
  • Simple
    • Default routing policy when you create a new record set
    • Most commonly used when you have a single resource that performs a given function for domain
    • Example would be a single web server that serves content for a single domain name
  • Weighted
    • Use to route traffic to multiple resources in proportions that you specify
    • Split traffic based on different weights assigned within record set
    • Example would be sending 10% of user traffic to US-East-1 and other 90% to US-East-2
  • Latency
    • Use when you have resources in multiple locations and you want to route traffic to resource that provides least latency
    • Route traffic based on lowest network latency for end users, such as sending requests to region that will give user fasted response time
    • Create a resource record set for EC2 or ELB resources in each region that hosts content. When Route53 receives a request for content, it selects latency resource record for region that gives user lowest latency
  • Failover
    • Use when you want to configure active-passive failover
    • Example would be when you want primary site to be in US-East-1, and a DR site in US-West-1
    • Route53 will monitor health of our primary site using a health check
    • Health checks are not automatic and must be configured by user
  • GeoLocation
    • Use when you want to route traffic based on location of users
    • Example would be ensuring that EU customers get routed to servers residing in EU, and ensuring US customers get routed to servers residing in US
  • Geoproximity
    •  Use to route traffic based on location of resources
    • shift traffic from resources in one location to resources in another.
  • Multivalue answer
    • If Route 53 should respond to DNS queries with up to eight healthy records selected at random.
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