Im programming a Cisco ASA 5506. I need to add a primary (public) IP that is x.x.x.82/24 and a backup IP that is x.x.x.81/24. The ASA wont allow me to do this as it gives me an error: "the IP address cannot overlap with the subnet of interface outside" when i go to add the backup (public) IP. Is there a reason i cannot do this, and is there a workaround for that?
Im wondering if a possible workaround could be to make the subnet mask for the primary 255.255.255.254 since that contains the .82 - .83 IP's, and make the subnet for the backup 255.255.255.252 since that contains .80 - .83
My naivety may be overlooking something here though. any help is appreciated