ELB Cross-Zone Load Balancing Disabled

Tenacity Id

Risk Level




Last Updated:

April 21, 2022

Elastic Load Balancers (ELB) is not configured to balance traffic across availability zones. ELB distribute traffic to multiple targets hosting your application. Availability Zones (AZ) are multiple, isolated locations within each AWS Region, they are the first line of resiliency within AWS. If an application is configured to use only one AZ it is possible that the application would not be available in the event of an AZ outage. It is recomended that ELBs be configured to use multiple availability zones.