Every CIDR should be unique to properly route network traffic between each Active-Active database instance and your consumer VPCs. The CIDR block regions should not overlap between the Redis server and your app consumer VPCs. In addition, CIDR blocks should not overlap between cluster instances.

When all Deployment CIDR regions display a green checkmark, you're ready to continue.

Green checkmarks indicate valid CIDR address values.

Red exclamation marks indicate error conditions; the tooltip provides additional details.

Red exclamation points indicate CIDR address problems.