# Limitations For technical reasons this feature can only be used subject to the following limitations: * In public LANs that do not contain load balancers. * With reserved public IP addresses only; DHCP-generated IP addresses cannot be used. * Virtual MAC addresses are not supported. * IP failover must be configured for all HA setups. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ionos.com/cloud/network-services/vdc-networking/ip-failover/overview/limitations.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.