3.3.5.1 Receiving a DHCPACK Message
If a Validating Server receives a DHCPACK message containing a non-empty Rogue Detection Reply option (section 2.2.2.5), it MUST consider itself unauthorized and set the DHCPv4ServerAttributes.IsRogue element, a shared ADM element (see [MS-DHCPM] section 3.1.1.26), to TRUE.
If a Validating Server receives a DHCPACK message that either does not contain a Rogue Detection Reply option (section 2.2.2.5) or contains an empty one, it retries sending the DHCPINFORM message.
The maximum number of retries is implementation-specific.<53> When all attempts are exhausted, the Validating Server MAY<54> consider itself authorized and set the DHCPv4ServerAttributes.IsRogue element, a shared ADM element (see [MS-DHCPM] section 3.1.1.26), to FALSE or continue validation using the DHCPv6 Information-request message.