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Do you have any Internet-facing load balancers? IIUC, each AWS application load balancer gets a couple of public IPv4 addresses. So I guess if you have a single
by mwcampbell 5y ago
Do you have any Internet-facing load balancers? IIUC, each AWS application load balancer gets a couple of public IPv4 addresses. So I guess if you have a single ALB and a couple of NAT gateways (in two availability zones), you could still end up with a total of 5 public IPv4 addresses.
- olyjohn 5y agoLast time I set up an ALB, it required 8 IP addresses. I assume that is because it spins up extra instances on the backend as the load increases. Most of the time the hostname is only assigned to 2 IPs.
- bradknowles 5y agoTwo per AZ you operate in. If you want to be multi-AZ across four AZs, then 4*2 IP addresses.