When customers attempt to create multiple NSDs using the same peer IP address, they may encounter the following error: "Primary VPN Gateway address and Local Auth ID conflict with existing data center."
This error occurs because when the Local Auth ID is set to the default value, it uses the IP address. If multiple NSDs are created with the same peer IP and the default Local Auth ID, a conflict arises, as the peer side cannot differentiate between them.
To resolve this issue, ensure that each NSD uses a different FQDN (Fully Qualified Domain Name) as the Local Auth ID. By assigning a unique FQDN to each NSD, you ensure that each one has a distinct Local Auth ID, avoiding the conflict caused by using the same IP address as the Local Auth ID across multiple NSDs.