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If a BIG-IP® VE becomes unavailable for any reason, it can fail over to another BIG-IP VE. In the AWS environment, if the active BIG-IP VE suddenly goes offline, any connections destined for that BIG-IP VE are dropped, but future connections will be processed by the other BIG-IP VE when it becomes active.
The following illustration shows an example of two BIG-IP VE instances in an Amazon VPC. The two BIG-IP VEs are members of a BIG-IP device group, which means that they trust each other, their configurations are synchronized, and the two BIG-IP VEs can fail over to one another.
Each BIG-IP VE has the default floating traffic group, traffic-group-1, that contains a floating virtual IP address. Application traffic is targeted for the virtual IP address on BIG-IP A. If BIG-IP A goes offline, the virtual IP address becomes active on BIG-IP B and the traffic is redirected to it.
Complete the tasks in this guide to create this deployment. Alternately, you can use CloudFormation templates to create this deployment. For more information about CloudFormation templates provided by F5®, go to https://github.com/F5Networks.