3.2.5.1 Receiving a DHCPDISCOVER Message

Increment the DHCPv4ServerMibInfo.Discovers element, a shared ADM element (see [MS-DHCPM] section 3.1.1.1), as described in section 1.4, point 10.

Evaluate and apply administrative controls as described in section 1.4, point 6.<34>

If the DHCPDISCOVER message contains a Vendor Class Identifier Option (section 2.2.3) with a value defined in section 2.2.3, the DHCPv4 server SHOULD ignore the Vendor Class Identifier Option and process the message as if the option were not present. The server MAY<35> instead include any standard option or vendor-specific option defined in this specification in its response (if configured to do so by the administrator) in the DHCPOFFER message sent to the clients.

If the DHCPDISCOVER contains a Client Identifier Option (Option 61) with the field Client-Identifier containing the first four bytes as "RAS", the DHCPv4 server MUST ignore any FQDN Option (Option 81) in the DHCPv4 message and MUST NOT perform DNS registration of A and PTR records on behalf of the DHCPv4 client. For more information, see [RFC4702].

If processing the DHCPDISCOVER message results in the server sending a DHCPOFFER message to the client, then increment the DHCPv4ServerMibInfo.Offers element, a shared ADM element (see [MS-DHCPM] section 3.1.1.1), as described in section 1.4, point 10.