In many enterprise environments a common challenge is to how to handle the allocation of IP CIDR blocks be that to Data Centers, Offices, Subnets so as to ensure that resources don’t end up with IP addresses that have already been assigned to resources on the Network. Duplicate IP Addresses on the Network can cause numerous issues and AWS have previously written the following blog that discusses several solutions to this challenge such as the use of NAT Gateways and AWS PrivateLink or a couple of more manual approaches to workaround the issue.
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